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Prickly-pears12/15/2021 Below are lists of diagnostic features of several forms of Opuntia in southern California. There is a photo comparison with each Opuntia form below the text. This webpage is a work in progress. Common Opuntia by area: San Bernardino Forms aY, aS, O. vaseyi LA Forms aY, bL, O. occidentalis (form O), O. vaseyi (form P) Orange County Forms K, aF, G, aH, O. semispinosa (form C), O. vaseyi (form P) Coastal San Diego County O. demissa (form B), O. semispinosa (form C), forms i, aL, G, L Ventura County Forms aL, aX, ai, O. semispinosa (form C), O. littoralis Descriptions: Cladodes rhomboid, glochids yellow, long, major spines straight, deflexed, leaf apex narrowly acute, style white, stigma lobes pale green, chunky, overlapping, fruit pyriform … form A, pages 1-2 of photo comparison Here is a map of iNaturalist observations of this form: https://www.inaturalist.org/projects/opuntia-form-a Areoles on cladode usually elliptic, major spines usually 2-3, somewhat curved, pointing downwards, bristles on equator of budding receptacle often shorter than subtending leaves, lower half of areole overgrown by leaf, leaves breaking off easily from base, trichomes by margin of receptacle areoles tawny, style bulb 1.3 cm long, 8 mm wide, style neck 7 mm long, stigma lobes lighter green, usually not touching apart from where they fuse, fruit lost by December, new dark brown cladodes common December-March, plants have lots of flower buds in March … O. demissa (form B), p. 3-6 https://www.inaturalist.org/projects/o-demissa Areoles on cladode circular, most spines nearly straight, angled, trichomes by margin of receptacle areoles white, receptacle narrowly turbinate-pyriform, several bristles on equator of budding receptacle far exceeding subtending leaves, stigma lobes often clenched, style rarely yellow, 2 fruits often fused … O. semispinosa (form C), p. 7-10 https://www.inaturalist.org/observations/78930014 https://www.inaturalist.org/observations/92864061 https://www.inaturalist.org/observations/25488895 Areoles elliptic, spines red, pointing in all directions … Form D, p. 11 https://www.gbif.org/occurrence/3125117521 https://www.inaturalist.org/observations/10080750 https://www.inaturalist.org/observations/9036974 Major spines on cladode are longer, receptacle oblong-obconic, areoles on receptacle smaller, budding tepals turning purple, style yellow on Catalina Island, pink elsewhere, stigma oblong, fruits often stemming from upper middle of cladode instead of cladode margin, trichomes by margin of receptacle areoles white, fruit pyriform … form E, p. 12-13 https://www.inaturalist.org/observations/6122177 https://www.inaturalist.org/observations/1944237 https://www.inaturalist.org/observations/122683841 Upright, areoles circular, spines on cladodes golden proximally, straight, pointing outward and in all directions, receptacle square, leaves on budding receptacle often erect, bristles on receptacle golden, fanned out, some budding tepals semicircular, flower bud shorter/depressed, stigma lobes light green, clenched, stigma wide, fruit often wider below middle, … form F, p. 14-16 https://www.inaturalist.org/projects/opuntia-form-f Cladodes rhomboid or elliptic, new cladodes green, leaves on new cladodes long, apices red, areoles sometimes 6 per parastichy (this character was used to describe O. clarkiorum), sometimes narrowly elliptic, spines often +-5 per areole, golden and shiny, sometimes brown at base, flower buds initially shiny brown, apices becoming acute with midrib raised, stigma lobes medium green, sides often touching but tips free, fruit stipitate, periderm on top of fruit slopes downward immediately at the edge, seed pulp staining paper orange … Form G, p. 17-20 https://www.inaturalist.org/projects/opuntia-form-g Cladodes rhomboid, areoles elliptic, spines golden at base, white distally, glochids tan, receptacle slender, trichomes by margin of receptacle areoles white, budding tepals green below apex, style white, stigma not so ovoid, inner tepals spatulate, fruit turbinate, flat-topped, growing near Penasquitos Creek and at Four Corners south of Ramona … form H, p. 21-22 https://www.inaturalist.org/observations/91153011 https://www.inaturalist.org/observations/121631531 https://www.inaturalist.org/observations/48702004 https://www.inaturalist.org/observations/16071850 https://www.inaturalist.org/observations/12469655 Cladodes gray, large, kite-shaped or rhomboid, margins of pad purple and areoles encircled by purple, spines deflexed at bottom of areole on margin of cladode, stigma lobes chunky, medium-dark green, inner tepals not really spatulate, pale yellow fading eventually to pink, budding tepals purple, fruit sometimes has a neck, periderm wrinkled, seed embryo comma-shaped, fruit retained through December, new pads uncommon in December … form I, p. 23-26 https://www.inaturalist.org/observations/99064763 https://www.inaturalist.org/observations/78892688 https://www.inaturalist.org/projects/opuntia-form-i Some cladodes orbicular, spines porrect in bottom of areoles, glochids rust-colored, tubercules on receptacle not prominent, seed embryo C-shaped … form J, p. 27-29 https://www.inaturalist.org/observations/104085163 https://www.inaturalist.org/observations/23258843 https://www.inaturalist.org/observations/92862623 https://www.inaturalist.org/observations/97083360 https://www.inaturalist.org/observations/88703142 https://www.inaturalist.org/observations/104085176 https://www.inaturalist.org/observations/104085174 https://www.inaturalist.org/observations/104085164 https://www.inaturalist.org/observations/7057936 https://www.inaturalist.org/observations/3264482 Cladodes pale green, areoles elliptic-subcircular, 1 spine in lower middle of areole often perpendicular to areole or ascending, spines in upper areoles straight, receptacle turbinate, bristles dark brown, exceeding subtending leaves, stigma lobes clenched … form K, p. 30-31 https://www.inaturalist.org/projects/opuntia-form-k Habit low, cladodes glaucous, often suborbicular and larger than a dinner plate, areoles on newer cladodes or cladode margin narrowly oblong, areoles often surrounded by dead cuticle, glochids rusty brown, elongate receptacles nearly linear, tepals in bud still green when fairly big, tepals narrowly spatulate, style white … form L, p. 32-34 https://www.inaturalist.org/projects/opuntia-form-l Cuticle darker around areoles, areoles on cladode circular, receptacle in flower short, globose, leaves on budding receptacle turning red, style yellow … form M, p. 35-36 https://www.inaturalist.org/projects/opuntia-form-m Spines in upper part of areole linear, not wider at base, spines mostly straight, some twisted or curved just before apex, spines not all pointing downwards, flower buds pale purple-brown, margin white … form N, p. 37-38 This form may be more common in Baja near Punta Banda or southward. https://www.inaturalist.org/observations/126756570 https://www.inaturalist.org/observations/99470363 https://www.inaturalist.org/observations/126756576 https://www.inaturalist.org/observations/126756552 https://www.inaturalist.org/observations/126756571 Upright, cladodes glaucous, about 30 x 20 cm, areoles narrowly elliptic, leaves on receptacle long, tepals in bud developing caudate apices, inner tepals 9-10, yellow with orange blush along middle, style white, stigma lobes leaning, twisted, several extending higher than others, hilum big … form O, p. 39-41 https://www.inaturalist.org/observations/66795032 https://www.inaturalist.org/observations/47910215 https://www.inaturalist.org/observations/104441879 https://www.inaturalist.org/observations/102730028 https://www.inaturalist.org/observations/102729749 Spines red-orange or brown at base, tepals pink, filaments whitish or red, receptacle short, style white, stigma light-medium green … Opuntia vaseyi (form P), p. 42-43 https://www.inaturalist.org/observations/78768902 https://www.inaturalist.org/observations/32855080 https://www.inaturalist.org/observations/12615423 https://www.inaturalist.org/observations/126576048 https://www.inaturalist.org/observations/126576054 https://www.inaturalist.org/observations/126576051 Cladodes dull green, areoles elliptic, spines orange at base, flattened, 1 major and 1 minor spine point straight down, close to pad surface, other major spine porrect, areoles all the way at bottom of receptacle, budding tepals dark pink, margins of budding tepals erose, style red, sometimes wide at base, fruit barrel-shaped, umbilicus small, periderm all around flush with top of fruit, growing in Florida Canyon next to Balboa Park … form Q, p. 44-45 https://www.inaturalist.org/observations/96235143 https://www.inaturalist.org/observations/11622745 https://www.inaturalist.org/observations/11619186 https://www.inaturalist.org/observations/24229427 https://www.inaturalist.org/observations/25917006 Cladodes plump, cladode surface elevated below areoles, major spines curved, sometimes on newer cladodes 1 major spine brown, porrect, second major spine gray and weathered, deflexed, 1 minor spine, leaves wide, spicules few, brown, receptacle 5 x 2 cm, leaves and budding tepals turning a glossy purple-brown color, tepals pale yellow, style white, 2.2 cm long, bulb 5.5 mm wide, stigma 6 mm long, 6 mm wide, ovary 1.5 cm long, 5 mm wide on flower with pollen, fruit umbilicus shallow … Form R, p. 46-47 https://www.inaturalist.org/projects/opuntia-form-r Areoles 6 per parastichy, spines porrect and slightly deflexed, 1 major, 1 minor, glochids long, receptacle obconic with narrow tubercules, spicules not exceeding subtending leaves towards middle of receptacle … Form S, p. 48 https://www.inaturalist.org/projects/opuntia-form-s Spines sometimes blackish-brown, receptacle slender, leaves few on neck, style white, stigma light green, flat-topped, growing in river washes in Ventura and San Diego ... Form T, p. 49 https://www.inaturalist.org/observations/153534363 https://www.inaturalist.org/projects/opuntia-form-t Cladodes subcircular, spines similar in length, reddish at base, receptacle dark green, flower buds turning maroon, stigma closed … Form U, p. 50 https://www.inaturalist.org/projects/opuntia-form-u Cladodes dull gray-green, surfaces uneven, leaves and budding tepals thick, green turning pale pink, receptacle wider around middle, grayer, without narrow tubercules, stigma lobes often not touching except where they fuse at the base, plant often in fruit and flower simultaneously … Form V, p. 51 https://www.inaturalist.org/projects/opuntia-form-v Cladodes elliptic, major spines 1-2, yellow distally, brown at base, long, twisted and slightly curved, fruit pyriform, spicules yellow … Form W, p. 52 https://www.inaturalist.org/observations/6599982 https://www.inaturalist.org/observations/6692214 https://www.inaturalist.org/observations/6692206 https://www.inaturalist.org/observations/129585234 Some plants have dark brown new cladodes, mature cladodes regularly glaucous, often narrowly obovate, budding tepals light pink, younger ones with broad apices … Form X, p. 53 https://www.inaturalist.org/projects/opuntia-form-x Plant low, parastichies with up to 6 areoles, areoles narrowly oblong, major spine usually 1 per areole, long, deflexed and positioned close to cladode surface, orange-brown fading to white distally, 1 longer minor spine underneath the major spine, 2 shorter minor spines diverging on either side of major spine, spicules conspicuous on budding receptacle, budding tepals appressed by apex of flower bud, budding tepals and leaves initially pale green, yellow tepals rounded towards apex … Form Y, p. 54-55 https://www.inaturalist.org/projects/opuntia-form-y Cladodes gray, droplet-shaped, with wrinkles often running the width of the cladode, 1 major spine in areoles in upper half of mature cladodes, areoles spineless in lower half of cladode, receptacle obconic, budding tepals turning pale brown, apices acute, stigma light green, Warner Springs and east of Morena Village … Form Z, p. 56-57 https://www.inaturalist.org/projects/opuntia-form-z Cladodes dull, grayish, areoles sunken, spines and spicules pink, budding tepals and leaves on receptacle pink, style pink-red, stigma deltoid, south of Lake Morena and at El Salto east of San Quintín … Form aA, p. 58-59 https://www.inaturalist.org/observations/12720890 https://www.inaturalist.org/observations/6281194 https://www.inaturalist.org/observations/101831410 Plant short, new cladodes with purple rings around areoles, mature cladodes circular, spines pointing in all directions, style whitish, stigma light green, Chula Vista … Form aB, p. 60 https://www.inaturalist.org/projects/opuntia-form-ab Cladodes obovate, cladode tissue coming up the sides of the areoles, 1 major spine twisted and deflexed, the other major spine directly opposite it often ascends, leaves on receptacle becoming long, linear, maroon, tepals yellow distally, orange at base, style white, +-11 stigmas balled up, fruit sometimes has a neck … Form aC, p. 61-62 https://www.inaturalist.org/observations/39658532 https://www.inaturalist.org/observations/35102735 https://www.inaturalist.org/observations/7388280 https://www.inaturalist.org/observations/11421465 Cladodes subcircular, glaucous, areoles sunken in cladode surface, glochids brown, leaves red distally, orange proximally, the area around areoles on receptacle is sometimes purple, receptacle with tubercles, midrib of budding tepals dark pink, apical margin light pink, stigma lobes linear, with gaps between lobes … Form aD, p. 63-64 https://www.inaturalist.org/projects/opuntia-form-ad Spines curved, brown proximally, tubercules on receptacle prominent, glochids and spicules rust-colored, leaves purplish, spicules extending halfway up flower bud, margins of budding tepals not as white as in O. occidentalis, bases not as green, style white … Form aE, p. 65 https://www.inaturalist.org/projects/opuntia-form-ae Arborescent, cladodes obovate, areoles on cladode narrowly oblong, spines 1-3, very short, glochids in apical tuft, trichomes by margin of areoles on receptacle white, glochids and spicules yellow, flower bud depressed, style white, stigma dark green, fruit pyriform, Orange County … Form aF, p. 66 https://www.inaturalist.org/projects/opuntia-form-af Cladodes glaucous, rhomboid, plump, areoles mostly circular, purple below areole, major spines 1-3, red proximally and yellow distally, one sometimes protrudes straight out/perpendicular to areole, budding tepals turning maroon, inner tepals widely obovate, with orange blush down middle, maybe 2x length of outer filaments, plant growing in Cuyamacas or close to desert transition area … Form aG, p. 67 https://www.inaturalist.org/projects/opuntia-form-ag Epidermis coming up the sides of areoles, often 1 major spine per areole, spines proximally yellow, long, glochids and spicules yellow, tepals initially narrow in bud, receptacle more elongate, tepals pink, sometimes obcordate, style magenta, stigma medium green/less pale than in O. vaseyi … Form aH, p. 68 https://www.inaturalist.org/projects/opuntia-form-ah Style yellow/white, tepals dark yellow, some tepals abaxially brown at apex, receptacle oblong, with tubercules, cladodes mostly circular, cladodes with leaves are brown at the tip, leaves brown or green, areoles elliptic, glochids brown, major spines often 2 per areole, the upper one being brown, Ventura … Form ai, p. 69 https://www.inaturalist.org/projects/opuntia-form-ai Cladodes subcircular, 1 major and 1 minor spine prominent, both deflexed, spines on cladode margin brown at base, outer tepals and buds green, apices darkened, receptacle pale green, without tubercles … Form aJ https://www.inaturalist.org/observations/27362579 https://www.inaturalist.org/observations/155706101 Stigma dark green, outer tepals have caudate apices, style white/yellow, style bulb looks wide, receptacle slender, with long tubercules, leaves and flower buds turn pale pink, then red, flower bud wider than receptacle, cladode obovate, spines long, 1 is deflexed in each areole, new cladodes with leaves are brown and glossy, leaves are long, top of fruit shrivels in between areoles … Form aK, p. 71 https://www.inaturalist.org/projects/opuntia-form-ak Cladodes often spatulate, spines short, thin, seemingly round, glochids rust-colored in April and May, spicules far exceeding subtending leaves, stigma light green, style pink or yellow?, fruit stipitate … Form aL, p. 72-73 https://www.inaturalist.org/observations/16784941 https://www.inaturalist.org/observations/116917391 https://www.inaturalist.org/observations/119359256 https://www.inaturalist.org/observations/121830143 https://www.inaturalist.org/observations/119175935 https://www.inaturalist.org/observations/16784941 https://www.inaturalist.org/observations/78634523 https://www.inaturalist.org/observations/132082285 https://www.inaturalist.org/observations/77913694 https://www.inaturalist.org/observations/20983159 https://www.inaturalist.org/observations/11565736 https://www.inaturalist.org/observations/39813031 https://www.inaturalist.org/projects/opuntia-form-al Spines brown, pointing in all directions, receptacle semicircular, flower buds initially shiny green with brown midstripe, Chula Vista … Form aM, p. https://www.inaturalist.org/observations/135767731 https://www.inaturalist.org/observations/49998197 https://www.inaturalist.org/observations/27071373 Plant low, small, cladodes circular-rhomboid, gray, purple at margins of pad and around areoles, glochids in cylindrical tuft, stigma lobes 5+, light green, not pressed up against each other (can see in between lobes), fruit barrel-shaped, apex crowned with golden spicules diverging in opposite directions … Form aN, p. https://www.inaturalist.org/projects/opuntia-form-an Leaves turning red, cuticle around areoles darker green, receptacle also darker green, major spines 2, bent just before apex, yellowish at base, bristles on receptacle long, projecting horizontally, stigma white-red, stigma lobes chunky, fruit bright red, widest around middle of bulb atop stipe ... Form aO, p. Note: receptacles, flower buds, and fruit shape are similar to form aF https://www.inaturalist.org/observations/121038467 https://www.inaturalist.org/observations/142560260 https://www.inaturalist.org/projects/opuntia-form-ao Cladodes rhomboid, glochids brown, in a u-shape, leaves brown at apex and paler proximally, long, narrow, tepals dark yellow fading to dark orange-pink, inner tepals orange at base, outer petals with orange midstripe on upper face, stigma light green, open at top, Lake Mathews ... Form aP https://www.inaturalist.org/observations/164367366 https://www.inaturalist.org/observations/26523823 Cladodes rhomboid, old spines turn black, receptacle widest just below apex, tepals pale yellow ... Form aQ, p. https://www.inaturalist.org/observations/12402377 https://www.inaturalist.org/observations/116382559 Cladodes obovate, glaucous, 1 spine towards middle of areole ascending, brown, 1-3 major spines deflexed, receptacle obconic, spicules at apex of receptacle long, flower buds dull pink, flower pale yellow, stigma light green ... Form aR, p. https://www.inaturalist.org/observations/76882079 https://www.inaturalist.org/observations/76993927 https://www.inaturalist.org/observations/46173449 Plant low, cladodes glaucous, spines white (dirty white or brown at base), apices of budding tepals red, acute, leaves on receptacle hooked, inner tepals yellow, outermost tepals dark red, style white, stigma light green, though not as pale/bright as in O. vaseyi … Form aS, p. https://www.inaturalist.org/observations/46809301 https://www.inaturalist.org/observations/25537584 https://www.inaturalist.org/observations/73684878 https://www.inaturalist.org/observations/77628641 https://www.inaturalist.org/observations/75356456 https://www.inaturalist.org/observations/76629573 https://www.inaturalist.org/observations/76840187 https://www.inaturalist.org/observations/102336037 https://www.inaturalist.org/observations/91330811 Style pink, tepals peach-colored or yellow with orange midstripe, stigma lime green, stigma lobe apices swollen and 3-parted, cladodes with leaves are green, leaves red, lowest areoles on mature cladodes are spineless, areoles circular, cladodes elliptic, spines long, 1 major spine is deflexed … Form aT, p. https://www.inaturalist.org/projects/ventura-opuntia-with-long-spines-and-pink-styles Cladodes obovate, gray-green, glochids yellow, spines white, 2 spines spreading laterally away from areole, 1 major spine deflexed with a minor spine underneath it, fruit pyriform, inland of Ensenada … Form aU, p. https://www.inaturalist.org/observations/37054858 https://www.inaturalist.org/observations/52635034 2 spines spreading laterally away from areole, 1 major spine deflexed with 1-2 minor spines underneath it, spines red-brown at base, spicules yellow, long, radiating outward from areole, tepals pale yellow, fruit globose (not stipitate), areoles mostly on upper half … Form aV, p. https://www.inaturalist.org/projects/opuntia-form-av Upper half of new cladode with leaves is brown, areoles encircled by purple, spines brown at base, 1-2 spines at middle of areole are porrect, San Vincente - Vincente Guerrero … Form aW, p. https://www.inaturalist.org/projects/opuntia-form-aw Style red, brown bristles extend at least halfway up flower bud, glochids long, prominent at spineless gap on apex of cladodes, spines brown, pointing in every direction, lowest areoles are spineless, fruit stipitate ... Form aX https://www.inaturalist.org/projects/opuntia-form-ax Leaves brown, triangular, receptacle with long tubercules, the more immature flower buds are golden on the sides and dull pink towards the top, stigma light green, LA - Rancho Bernardo ... Form aY https://www.inaturalist.org/observations/12652125 https://www.inaturalist.org/observations/75130531 https://www.inaturalist.org/observations/77217630 https://www.inaturalist.org/observations/76768367 https://www.inaturalist.org/observations/12396539 https://www.inaturalist.org/observations/48169301 https://www.inaturalist.org/observations/76338139 https://www.inaturalist.org/observations/77379891 https://www.inaturalist.org/observations/47196286 https://www.inaturalist.org/observations/80214549 https://www.inaturalist.org/observations/12217828 https://www.inaturalist.org/observations/116370575 https://www.inaturalist.org/observations/111883589 https://www.inaturalist.org/observations/115249576 https://www.inaturalist.org/observations/110613785 https://www.inaturalist.org/observations/118850158 https://www.inaturalist.org/observations/111489353 https://www.inaturalist.org/observations/46794174 https://www.inaturalist.org/observations/12647661 https://www.inaturalist.org/observations/167581837 Cladodes rhomboid, areoles elliptic to subcircular, 1-2 spines porrect in an areole, major spines 1-2 per areole on some cladodes, new mottled spines yellow (not brown or red), style white ... Form aZ https://www.inaturalist.org/observations/11573659 https://www.inaturalist.org/observations/144577309 https://www.inaturalist.org/observations/11586694 Spines twisted, apex lower or higher than basal half of spine sometimes, 1+ spines porrect in each areole, brown or reddish at base and faded white distally, downward-facing spines recurved, leaves on receptacle hamate, spotted red abaxially, green adaxially, bristles exceeding leaves on receptacle, receptacle widest before apex, tepals on early buds with sides gently sloping away from apex, tepals red at apex, tan otherwise as flower opens, style white, stigma lobes upright, not obscuring center, apex of style visible from above, stigma medium green ... Form bA https://www.inaturalist.org/observations/159242963 https://www.inaturalist.org/observations/82484527 https://www.inaturalist.org/observations/39866721 https://www.inaturalist.org/observations/39858920 https://www.inaturalist.org/observations/11507420 https://www.inaturalist.org/observations/70224659 https://www.inaturalist.org/observations/5642287 https://www.inaturalist.org/observations/5548191 https://www.inaturalist.org/observations/77339681 Unweathered spines yellow, longest spine in each areole about 3 cm long, ascending, stemming from bottom of areole above deflexed spine, leaves on receptacle up to 1 cm long, receptacle bright green, oblong or widest just below apex, 5.2 x 2.45 cm, areoles narrowly elliptic, 6 x 2 mm, 5 x 2.5 mm, 6.5 x 3 mm, ovary 2.2 cm long, 5 mm wide, style white, 2.5 cm long, bulb 5 mm wide, stigma 8 x 7 mm, plants have lots of flower buds in March, some flowers, Poway to San Pasqual ... Form bB Note measurements tentative, taken from 1 cladode https://www.inaturalist.org/projects/opuntia-form-bb ... Form bC https://www.inaturalist.org/observations/26641791 https://www.inaturalist.org/observations/120258700 https://www.inaturalist.org/observations/84946976 https://www.inaturalist.org/observations/80972851 Cladodes obovate, thin, center of areoles grayish, areoles elliptic, spines triangular in cross-section, spines red-orange towards base, 1 major spine arching downwards in each areole, a minor spine deflexed, others porrect, receptacles and new cladodes chartreuse, flowers yellow, style white, stigma lobes sometimes upright, spread apart from center, lighter green, periderm immediately sloping downward at edge of fruit, Aguanga-Glenoak Hills … Form bD https://www.inaturalist.org/projects/opuntia-form-bd Trichomes at margin of areoles on receptacle are cream/orangish-white, tepals pale yellow, orange in middle, style white, stigma light green, Pala ... bE https://www.inaturalist.org/observations/77218848 https://www.inaturalist.org/observations/77159846 Long leaves with long spines on new cladodes, cladodes rhomboid, 2 curved major spines spreading laterally, 1 straight and projecting downwards, spines pink-red at base, glochids showy, leaves on receptacle turning pink, budding tepal apices attenuate, style seems wide, stigma lobes sometimes straight ... Form bF https://www.inaturalist.org/observations/27295878 https://www.inaturalist.org/observations/87380689 https://www.inaturalist.org/observations/104241009 https://www.inaturalist.org/observations/117180190 Form bG https://www.inaturalist.org/observations/58849626 https://www.inaturalist.org/observations/58983145 https://www.inaturalist.org/observations/74605030 Form bH https://www.inaturalist.org/observations/71435424 Form bi https://www.inaturalist.org/observations/106280638 https://www.inaturalist.org/observations/20749687 Tepals pale yellow, stigma light green, minor spines numerous, Clairemont ... Form bJ https://www.inaturalist.org/observations/45591991 Spines brown, limestone outcrop, Orange County ... Form bK https://www.inaturalist.org/observations/4645875 https://www.inaturalist.org/observations/5100171 https://www.inaturalist.org/observations/40668029 Leaves often curved, deep red, Eaton Canyon - Monrovia ... Form bL https://www.inaturalist.org/observations/77690584 https://www.inaturalist.org/observations/48886385 https://www.inaturalist.org/observations/1634049 https://www.inaturalist.org/observations/1432599 https://www.inaturalist.org/observations/111696519 https://www.inaturalist.org/observations/12864528 – flwr https://www.inaturalist.org/observations/12645662 https://www.inaturalist.org/observations/12301775 https://www.inaturalist.org/observations/82979 Spines on leafy cladodes divergent, 1 in each areole ascending, another deflexed, receptacle oblong, swollen, tepals orange, pink at base, form bM https://www.inaturalist.org/observations/26358237 https://www.inaturalist.org/observations/112632844 https://www.inaturalist.org/observations/121544287 https://www.inaturalist.org/observations/48986681 Periderm with a divot at center, sides flush with top of fruit, stipe inconspicuous … Form bN, Opuntia phaeacantha var. piercei Fosberg https://www.inaturalist.org/observations/95482353 Buds/leaves https://www.inaturalist.org/observations/46412964 https://www.inaturalist.org/observations/29001664 https://www.inaturalist.org/observations/115224493 https://www.inaturalist.org/observations/119691580 https://www.inaturalist.org/observations/118538988 Leaves hooked upward/twisted, spines brown, curved, sometimes stemming from upper areole, receptacle dark green, style white … Form bO https://www.inaturalist.org/observations/116201816 New cladodes with red leaves, prominent spines, mature cladodes rhomboid, spines brown or reddish at base, receptacle obconic, budding tepals narrow ... Form bP https://www.inaturalist.org/observations/45089627 https://www.inaturalist.org/observations/114329619 https://www.inaturalist.org/observations/114257894 Spicules golden, stigma sometimes deltoid, margin of budding tepals white, midrib the same color as the rest of the budding tepal ... Form bQ Note: Similar to plants around Tucson https://www.inaturalist.org/observations/117688441 https://www.inaturalist.org/observations/117688577 Tepals orange proximally ... Form bR https://www.inaturalist.org/projects/opuntia-form-br Cladodes rotund, obovate, gray, leaves long, spines brown at base, minor spines 3+, bent close to pad surface, 1 major spine deflexed, bent at base, other major spines porrect, receptacle dark green ... Form bC (O. megacarpa) https://www.inaturalist.org/projects/opuntia-form-bs Stigma lobes spiraled ... Form bT https://www.inaturalist.org/observations/36378625 https://www.inaturalist.org/observations/98253680 Photo comparison:
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