Cylindropuntia davisii

(Engelmann & J. M. Bigelow) F. M. Knuth in C. Backeberg and F. M. Knuth

in C. Backeberg and F. M. Knuth, Kaktus-ABC, 124. 1935.

Common names: Davis cholla
IllustratedEndemic
Basionym: Opuntia davisii Engelmann & J. M. Bigelow Proc. Amer. Acad. Arts 3: 305. 1856
Synonyms: Opuntia tunicata var. davisii (Engelmann & J. M. Bigelow) L. D. Benson
Treatment appears in FNA Volume 4. Treatment on page 111. Mentioned on page 104, 105, 110.

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. Spines 7–13 (–21) per areole, at most areoles, spreading, obscuring stems, yellow to redbrown 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. Glochids in adaxial tuft, yellow, 2–4 mm. 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. 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. Seeds, when present, yellow-tan, subcircular, flattened, 3 mm diam., sides smooth; girdle narrow, not protruding. 2n = 22, 44 (one count).


Phenology: Flowering late spring (May–Jun).
Habitat: Grasslands, oak-juniper-mesquite woodlands, plains or slopes, sandy to loamy soils
Elevation: 600-1500 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Cylindropuntia davisii"
subterete +  and angularly flattened +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
orange-yellow +
cushionlike +
gray +  and tan +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
deciduous +  and persistent +
20 +  and 35 +
subcircular +
Donald J. Pinkava +
(Engelmann & J. M. Bigelow) F. M. Knuth in C. Backeberg and F. M. Knuth +
Opuntia davisii +
proliferating +
flattened +  and cylindric +
Davis cholla +
N.Mex. +, Okla. +  and Tex. +
600-1500 m +
purplish +  and pale green +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (15 cm150 mm <br />0.15 m <br />) +
indehiscent +
persistent +, long +  and deciduous +
20mm;30mm +
tuberculate +
top--shaped +
dry +  and fleshy +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
with low marginal ridge +  and smooth +
not protruding +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Grasslands, oak-juniper-mesquite woodlands, plains or slopes, sandy to loamy soils +
15 cm150 mm <br />0.15 m <br /> (?) +
deciduous +
flattened +  and conic +
0 cm0 mm <br />0 m <br /> (3 cm30 mm <br />0.03 m <br />) +
succulent +
tuberculate +
fluted;spheric;depressed-spheric or club-shaped +
tinged color +
sometimes covered by outgrowths of proximal portion of style base or of flower tube wall +  and open +
persistent +  and deciduous +
Flowering late spring (May–Jun). +
ridgelike +  and nipple--shaped +
in C. Backeberg and F. M. Knuth, Kaktus-ABC, +
3;2;2;30 +
tuberlike +
3 cm30 mm <br />0.03 m <br /> (?) +
flattened;subcircular +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
fitting +
Illustrated +  and Endemic +
deciduous +  and persistent +
conspicuous +
7 (?) +  and 13 (?) +
flattened +
hard +  and rigid +
decurrent +
winged +  and unsegmented +
tuberculate +  and smooth +
40 cm400 mm <br />0.4 m <br /> (50 cm500 mm <br />0.5 m <br />) +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
segmented +
woody +  and succulent +
purple-pink +, cream +  and pale green +
tuberlike +  and elongate +
Opuntia tunicata var. davisii +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Cylindropuntia davisii +
Cylindropuntia +
species +
dull +  and glossy +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
terrestrial;epiphytic or epipetric +