Grusonia grahamii

(Engelmann) H. Robinson

Phytologia 26: 176. 1973.

Common names: Graham’s club-cholla
Basionyms: Opuntia grahamii Engelmann Proc. Amer. Acad. Arts 3: 304. 1856 (as grahami)
Synonyms: Corynopuntia grahamii (Engelmann) F. M. Knuth Opuntia schottii var. grahamii (Engel mann) L. D. Benson
Treatment appears in FNA Volume 4. Treatment on page 120. Mentioned on page 119.

Shrubs, forming mats, 8–20 cm. Roots tuberlike, 9 × 2 cm. Stem segments cylindric, curved and narrowed at base, 3–7 × 1.5–3.5 cm; tubercles narrow, 10–15 mm; areoles 3 mm in diam.; wool white to yellowish. Spines (6–) 8–15 per areole, mostly in distal areoles, white, yellow, tan, or redbrown, longest 3–5.5 cm; major 2–3 abaxial spines erect and redbrown, marginal spines deflexed and whitened, angular-flattened to subterete; longest central abaxial spine usually brownish, with whitish wavy lines, usually straight; major 2–5 adaxial spines divergent, ascending, rich redbrown, ± terete. Glochids increasing in number toward base of stem segments, adaxial in areole, white to yellow, to 6 mm. Flowers: inner tepals bright-yellow, 20–25 mm; filaments yellow-green; style and stigma lobes cream. Fruits yellowish, cylindric to ellipsoid, 20–35 × 12–20 mm, fleshy, spineless, yellow glochidiate; areoles 35–45. Seeds yellow, 4–5 × 3–4 mm, smooth (or with 1–2 broad bumps per side). 2n = 44.


Phenology: Flowering late spring (May–Jun).
Habitat: Chihuahuan Desert, sandy, gravelly bajadas and flats
Elevation: 700-1500 m

Distribution

V4 231-distribution-map.gif

N.Mex., Tex., Mexico (Chihuahua), Mexico (Durango)

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Grusonia grahamii"
rich +, 2 +  and 5 +
cushionlike +
3 cm30 mm <br />0.03 m <br /> (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
deciduous +  and persistent +
35 +  and 45 +
cushionlike +
Donald J. Pinkava +
(Engelmann) H. Robinson +
curving +
dislodged +
cylindric-clavate +
Opuntia grahamii +
proliferating +
flattened +  and cylindric +
Graham’s club-cholla +
N.Mex. +, Tex. +, Mexico (Chihuahua) +  and Mexico (Durango) +
700-1500 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 />) +
yellow;yellowish +
indehiscent +
persistent +, long +  and deciduous +
20mm;35mm +
glochidiate +
cylindric +  and ellipsoid +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not protruding +
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Chihuahuan Desert, sandy, gravelly bajadas and flats +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 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 +
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 +
3;2;2;30 +
adventitious +
9 cm90 mm <br />0.09 m <br /> (?) +
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 /> (0.5 cm5 mm <br />0.005 m <br />) +
pubescent +  and glabrous +
flattened;suborbicular +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
redbrown +, tan +, yellow +  and white +
deciduous +  and persistent +
conspicuous +
8 (?) +  and 15 (?) +
terete +  and strongly flattened +
3 cm30 mm <br />0.03 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
hard +  and rigid +
decurrent +
winged +  and unsegmented +
tuberculate +  and smooth +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
segmented +
woody +  and succulent +
Corynopuntia grahamii +  and Opuntia schottii var. grahamii +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Grusonia grahamii +
Grusonia +
species +
dull +  and glossy +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
conspicuous +
terrestrial;epiphytic or epipetric +
trailing +  and erect +
white +  and yellowish +