Cylindropuntia bigelovii |
Cylindropuntia davisii |
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teddy-bear cholla |
Davis cholla, thistle cholla |
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Habit | Shrubs, densely branched, 0.2–0.6 m; roots with elongate, tuberlike swellings. | |
Stem | segments easily detached, whorled, obscuring trunks, light green, 4–6 × 0.8–1.2 cm; tubercles prominent, 1–2 cm; areoles subcircular, 2–3.5 mm in diam.; wool tan. |
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Spines | 7–13(–21) per areole, at most areoles, spreading, obscuring stems, yellow- to red-brown to nearly black, tipped yellow, subterete to angularly flattened, the longest 1.5–5 cm; sheaths loose fitting, ± yellow to tan, 1.5–2 mm diam. |
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Glochids | in adaxial tuft, yellow, 2–4 mm. |
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Flowers | inner tepals yellow-green, tinged purple-red, aging reddish brown or bronze, spatulate, 15 mm, apiculate; filaments pale green basally to purplish distally; anthers orange-yellow; style cream to pale green, sometimes faint purple-pink distally; stigma lobes very pale green. |
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Fruits | usually sterile, often in chains of 2, yellow, top-shaped, 20–30 × 10–20 mm, pulpy, tuberculate, spineless (rarely few-spined); tubercles subequal; umbilicus 5–8 mm deep; areoles 20–35. |
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Seeds | , when present, yellow-tan, subcircular, flattened, 3 mm diam., sides smooth; girdle narrow, not protruding. |
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2n | = 22, 44 (one count). |
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Cylindropuntia bigelovii |
Cylindropuntia davisii |
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Phenology | Flowering late spring (May–Jun). | |
Habitat | Grasslands, oak-juniper-mesquite woodlands, plains or slopes, sandy to loamy soils | |
Elevation | 600-1500 m (2000-4900 ft) | |
Distribution |
AZ; CA; NV; nw Mexico
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NM; OK; TX |
Discussion | Varieties 2 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 4, p. 109. | FNA vol. 4, p. 111. |
Parent taxa | Cactaceae > subfam. Opuntioideae > Cylindropuntia | Cactaceae > subfam. Opuntioideae > Cylindropuntia |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Opuntia bigelovii | Opuntia davisii, Opuntia tunicata var. davisii |
Name authority | (Engelmann) F. M. Knuth: in C. Backeberg and F. M. Knuth, Kaktus-ABC, 125. (1935) | (Engelmann & J. M. Bigelow) F. M. Knuth: in C. Backeberg and F. M. Knuth, Kaktus-ABC, 124. (1935) |
Web links |