Opuntia chlorotica Engelm. & Bigelow  
Family: Cactaceae
dollarjoint pricklypear,  more...
Opuntia chlorotica image
Max Licher  
Trees or shrubs, erect, 2-2.5 m, with spiny, well-defined trunk to 30 cm diam. Stem segments not disarticulating, blue-green, flattened, obovate to circular, 13-21 × 11.5-19 cm, nearly smooth, glabrous; areoles 7-10 per diagonal row across midstem segment, subcircular to elliptic, with basal ridge, 3-6 × 2.5-4 mm; wool tan, aging grayish white. Spines absent or usually in distal areoles to evenly distributed over entire stem segment, yellow, aging red-brown to blackish, straight or weakly curved, ± acicular, deflexed, or some erect in marginal areoles; larger spines 0-7 per areole, terete or basally flattened, 25-45 mm, usually accompanied by few straight to wavy bristle-spines. Glochids crowded in narrow crescent along adaxial margins, longer toward base of areole margins, subapical tuft absent or poorly developed, yellow, aging reddish brown, to 14 mm. Flowers: inner tepals yellow (sometimes with reddish blush near base), abaxially reddish streaked along midveins, broadly spatulate-apiculate, 18-30 mm; filaments white to yellow; anthers; style and stigma lobes white, yellowish, or pale green. Fruits red, barrel-shaped, 30-60 × 18-40 mm, fleshy (often mummifying), glabrous, spineless; umbilicus 6-9 mm deep; areoles 40-68. Seeds yellowish, 3.5-4 × 3-3.5 mm, 1.5-1.8 mm thick, reniform to subcircular, flattened, often warped; girdle protruding 0.1-0.5 mm. 2n = 22. Flowering spring-summer (Apr-Jul). Desert grasslands, woodlands, chaparral, desert flats, rocky ledges, hills, canyons; 600-2400 m; Ariz., Calif., Nev., N.Mex., Utah; Mexico (Baja California, Baja California Sur, Sonora). Opuntia chlorotica hybridizes with O. santa-rita in southeastern Arizona and with the hexaploid O. phaeacantha forming the tetraploid O. ×curvispina in areas of Arizona, California, and Nevada.

Plant: tree or shrub 2-2.5 m tall, with spiny trunks to 30 cm long. PADS blue-green, obovate to circular, glabrous, 13-21 cm long, 11.5-19 cm broad. AREOLES 7-10 in a row diagonal across midpad, subcircular to elliptic with a basal ridge, 3-6 mm long, 2.5-4 mm wide; wool tan, aging grayish white Leaves: SPINES absent or mostly in distal areoles to well distributed over entire pad, yellow, aging red-brown to blackish, straight or weakly curved, acicular, deflexed except some erect in pads' marginal areoles; larger spines (0-)1-8+ per areole, terete or basally flattened, 2.5-4.5 cm long, usually accompanied by few straight to wavy bristle-spines. GLOCHIDS crowded in narrow marginal apical crescent, increasing in length toward base of areole, the subapical tuft absent or poorly developed, yellow, aging reddish brown, to 14 mm long Flowers: inner tepals yellow (sometimes with reddish blush at base), broadly spatulate-apiculate, 1.8-3 cm; filaments white to yellow; style and fresh stigmas white to yellowish or very pale green Fruit: FRUITS red, barrel-shaped, fleshy (often mummifying), glabrous, spineless, 3-5 cm long, 2-4 cm in diameter, the umbilicus 6-9 mm deep; areoles 40-68. SEEDS yellowish, reniform to subcircular, flattened but often warped, 3.5-4 mm long, 3-3.5 mm wide, 1.5-1.8 mm thick; girdle protruding 0.1-0.5 mm. Misc: Rocky ledges, hills, canyons, or uncommonly desert flats, desert grasslands, woodlands and chaparral; 600-2400 m (1900-7900 ft); Apr-Jul REFERENCES: Pinkava, Donald J. Cactaceae. 2003. J. Ariz. – Nev. Acad. Sci. Volume 35(2). REFERENCES: Pinkava, Donald J. Cactaceae. 2003. J. Ariz. – Nev. Acad. Sci. Volume 35(2).
Opuntia chlorotica image
Leslie Landrum  
Opuntia chlorotica image
Leslie Landrum  
Opuntia chlorotica image
Max Licher  
Opuntia chlorotica image
Max Licher  
More Images        Web Links       View Parent Taxon       Close window