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coyonostyle, tree cholla

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.
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.

Glochids

in dense adaxial tuft, pale yellow, 0.5–3 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.

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.

Seeds

yellow-tan, subcircular to angled, warped, 2.5–4 mm diam., sides smooth to slightly lumpy;

girdle usually narrow, not protruding.

Cylindropuntia imbricata

Distribution
from FNA
AZ; CO; KS; NM; OK; TX; n Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2+ (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Plants trees 3-5 m; stem segments 12-40 cm; tubercles widely spaced; spines, and sheaths when present, usually tan to dirty white or ± yellow
var. imbricata
1. Plants erect shrubs to 1.2 m; stem segments 10-20 cm; tubercles narrowly spaced; spines and sheaths silvery
var. argentea
Source FNA vol. 4, p. 112.
Parent taxa Cactaceae > subfam. Opuntioideae > Cylindropuntia
Sibling taxa
C. abyssi, C. acanthocarpa, C. arbuscula, C. bigelovii, C. californica, C. davisii, C. echinocarpa, C. fulgida, C. ganderi, C. kleiniae, C. leptocaulis, C. munzii, C. prolifera, C. ramosissima, C. spinosior, C. tunicata, C. versicolor, C. whipplei, C. wolfii, C. ×kelvinensis, C. ×tetracantha
Subordinate taxa
C. imbricata var. argentea, C. imbricata var. imbricata
Synonyms family cactaceae Cereus imbricatusH, Opuntia imbricata
Name authority (Haworth) F. M. Knuth: in C. Backeberg and F. M. Knuth, Kaktus-ABC, 125. (1935)
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