Cylindropuntia ramosissima

(Engelmann) F. M. Knuth in C. Backeberg and F. M. Knuth

in C. Backeberg and F. M. Knuth, Kaktu s-ABC, 122. 1935.

Common names: Diamond cholla
Illustrated
Basionyms: Opuntia ramosissima Engelmann Amer. J. Sci. Arts, ser. 2, 14: 339. 1852
Synonyms: Opuntia tessellata Engelmann
Treatment appears in FNA Volume 4. Treatment on page 118. Mentioned on page 103, 114.

Trees or shrubs, intricately branched, 0.5–2 m. Stem segments firmly attached, green drying gray and ropelike, cylindric, 2–8 (–10) × 0.4–1 cm; tubercles rhombic, convex (flattened upon drying), 0.4–0.8 cm; areoles subcircular abaxially, adaxially becoming usually deltate-linear; glochid-bearing portion protruding distally, wedged between bases of 2 adjacent tubercles, (3–) 4–7 × 1–1.5 (–2) mm; wool tan to white. Spines 0–5 per areole, usually in distal areoles or sometimes absent or nearly so, tan to redbrown to deep purple, aging gray; major abaxial spines 0–1 (–2), the longest spine spreading, (1.5–) 2.5–6 cm; adaxial spines usually reflexed, short to ± 1 cm; sheaths baggy. Glochids in subcircular to linear adaxial tuft, yellow to tan to brown, to 2 mm. Flowers: inner tepals bronze-red ± suffused rose, with mid stripes darker, ovate, 6–13 mm, acute-apiculate to attenuate; filaments greenish; anthers yellow; style whitish or blushed with rose-pink or light green; stigma lobes whitish. Fruits maturing tan, ellipsoid to stipitate-ellipsoid, 15–30 × 10–15 mm, dry at maturity, tuberculate, developing increasingly burlike, with many bristlelike spines; areoles (32–) 40–66, evenly spaced, woolly. Seeds pale-yellow to tan-gray, angular to squarish in outline, warped, 4–4.5 × 3.5–4 mm, sides irregularly concave-convex; girdle smooth. 2n = 22, 44.


Phenology: Flowering spring–summer (Apr–Aug).
Habitat: Mojave and Sonoran deserts, washes, flats, and bajadas, sandy loam, desert pavement, stony volcanic substrates
Elevation: 50-1100 m

Distribution

V4 228-distribution-map.gif

Ariz., Calif., Nev., Mexico (Baja California), Mexico (Sonora)

Discussion

Selected References

None.

Lower Taxa

None.

subcircular to linear +
cushionlike +
gray +  and tan +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
deciduous +  and persistent +
40 +  and 66 +
subcircular +
Donald J. Pinkava +
(Engelmann) F. M. Knuth in C. Backeberg and F. M. Knuth +
Opuntia ramosissima +
proliferating +
flattened +  and cylindric +
Diamond cholla +
Ariz. +, Calif. +, Nev. +, Mexico (Baja California) +  and Mexico (Sonora) +
50-1100 m +
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 />) +
spiny +  and spineless +
indehiscent +
persistent +, long +  and deciduous +
15mm;30mm +
tuberculate +
ellipsoid +  and stipitate-ellipsoid +
dry +  and fleshy +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Mojave and Sonoran deserts, washes, flats, and bajadas, sandy loam, desert pavement, stony volcanic substrates +
acute-apiculate +  and attenuate +
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 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 +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (6 cm60 mm <br />0.06 m <br />) +
tinged color +
stripes darker +
sometimes covered by outgrowths of proximal portion of style base or of flower tube wall +  and open +
persistent +  and deciduous +
Flowering spring–summer (Apr–Aug). +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
ridgelike +  and nipple--shaped +
in C. Backeberg and F. M. Knuth, Kaktu s-ABC, +
3;2;2;30 +
tuberlike +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
warped;angular;squarish +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
concave-convex +
Illustrated +
gray +, tan +  and redbrown +
deciduous +  and persistent +
conspicuous +
Many (?) +, Nearly (?) +, 0 (?) +  and 5 (?) +
flattened +
hard +  and rigid +
decurrent +
winged +  and unsegmented +
tuberculate +  and smooth +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
gray +  and green +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
segmented +
woody +  and succulent +
blushed with rose-pink or blushed with light green +  and whitish +
Opuntia tessellata +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Cylindropuntia ramosissima +
Cylindropuntia +
species +
dull +  and glossy +
convex +  and rhombic +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
shrub +  and tree +
terrestrial;epiphytic or epipetric +
tan +  and white +