Cylindropuntia imbricata |
Cylindropuntia ×kelvinensis |
|||||
---|---|---|---|---|---|---|
coyonostyle, tree cholla |
kelvin pricklypear |
|||||
Habit | Trees, with short trunks, or large shrubs, widely branching, (1–)1.5–2.5(–5) m. Stem segments firmly attached, whorled or subwhorled, gray-green, cylindric to weakly clavate, 10–40 × 1.5–4 cm; tubercles very prominent, widely spaced, (1.5–)2–5 cm; areoles elliptic, 5–8× 3–4 mm; wool yellow to tan, aging gray to black. | Trees 1.5–2 m; trunk commonly branched; crown open to compact usually bearing whorled branches. | ||||
Stem | segments often easily dislodged, if terminal, green or purple, 5–13 × 1.8–3 cm; tubercles prominent, broadly oval, 0.7–1.2(–1.5) cm; areoles obdeltate to rhombic, 4.5–6 × 3–5 mm; wool yellow, aging gray to black. |
|||||
Spines | (5–)8–15(–30) per areole or spineless to nearly spineless, usually at most areoles, not obscuring stems, spreading, straight or slightly curved, silver to yellow to usually ± red or tan to brown, stout, terete or sometimes flattened basally, 8–30(–40) mm subequal; sheaths silver to yellow to usually tan to dirty white, yellow tipped. |
0–8(–13) per areole, sometimes with 1–3 bristlelike spines along areole margins at most areoles, usually slightly interlacing with spines of adjacent areoles, yellowish to tan, sometimes with pinkish hue, to red-brown and partially gray coated, aging brown-gray to gray; major abaxial spines angular-flattened, usually reflexed, the longest to 30 mm; major adaxial spines subterete, erect-divergent, the longest to 18 mm; sheaths uniformly whitish or tipped yellow to gold, slightly baggy. |
||||
Glochids | in dense adaxial tuft, pale yellow, 0.5–3 mm. |
in inconspicuous adaxial crescent, yellow, to 1 mm. |
||||
Flowers | inner tepals dark pink to magenta to red-magenta, obovate, apiculate, 15–35 mm; filaments green basally to pink to magenta distally; anthers yellow; style light green basally or pink to red-magenta apically; stigma lobes green or cream. |
inner tepals rose to magenta, spatulate, 18–25(–30) mm, emarginate-apiculate; filaments deep rose; anthers yellow; style white, tinged red-purple distally; stigma lobes white with hint of green. |
||||
Fruits | not proliferating, yellow, obovoid, 24–45 × 20–40 mm, fleshy, tuberculate, spineless; areoles 18–30; tubercles nearly equal in length or longer in proximal portion of fruit, prominent (occasionally smooth at maturity); umbilicus 7–14 mm deep. |
usually sterile, sometimes forming short chains, yellow-green to yellow, sometimes purplish, 25–45 × 15–22 mm, fleshy, tuberculate, spineless; tubercles progressively longer toward fruit apex; umbilicus 4–7 mm deep; areoles 32–44. |
||||
Seeds | yellow-tan, subcircular to angled, warped, 2.5–4 mm diam., sides smooth to slightly lumpy; girdle usually narrow, not protruding. |
pale yellow, orbicular to angular or squarish in outline, flattened to warped, 3.5–4 × 3–4 mm, sides with 0–2 large depressions; hilum sometimes pointed; girdle smooth. |
||||
2n | = 22, 33. |
|||||
Cylindropuntia imbricata |
Cylindropuntia ×kelvinensis |
|||||
Phenology | Flowering spring (Apr–Jun). | |||||
Habitat | Sonoran desert scrub, edges of grasslands, rocky flats and slopes, rolling hills | |||||
Elevation | 500-1000 m (1600-3300 ft) | |||||
Distribution |
AZ; CO; KS; NM; OK; TX; n Mexico
|
AZ |
||||
Discussion | Varieties 2+ (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|||||
Key |
|
|||||
Source | FNA vol. 4, p. 112. | FNA vol. 4, p. 108. | ||||
Parent taxa | Cactaceae > subfam. Opuntioideae > Cylindropuntia | Cactaceae > subfam. Opuntioideae > Cylindropuntia | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | family cactaceae Cereus imbricatusH, Opuntia imbricata | Opuntia kelvinensis | ||||
Name authority | (Haworth) F. M. Knuth: in C. Backeberg and F. M. Knuth, Kaktus-ABC, 125. (1935) | (V. E. Grant & K. A. Grant) P. V. Heath: Calyx 4: 142. (1994) | ||||
Web links |