Difference between revisions of "Grusonia grahamii"
Phytologia 26: 176. 1973.
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|name=Opuntia grahamii | |name=Opuntia grahamii | ||
|authority=Engelmann | |authority=Engelmann | ||
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|publication_title=Proc. Amer. Acad. Arts | |publication_title=Proc. Amer. Acad. Arts | ||
|publication_place=3: 304. 1856 (as grahami) | |publication_place=3: 304. 1856 (as grahami) | ||
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|name=Corynopuntia grahamii | |name=Corynopuntia grahamii | ||
|authority=(Engelmann) F. M. Knuth | |authority=(Engelmann) F. M. Knuth | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Opuntia schottii var. grahamii | |name=Opuntia schottii var. grahamii | ||
|authority=(Engel mann) L. D. Benson | |authority=(Engel mann) L. D. Benson | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Cactaceae;Cactaceae subfam. Opuntioideae;Grusonia;Grusonia grahamii | |hierarchy=Cactaceae;Cactaceae subfam. Opuntioideae;Grusonia;Grusonia grahamii | ||
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name=Grusonia grahamii | name=Grusonia grahamii | ||
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|authority=(Engelmann) H. Robinson | |authority=(Engelmann) H. Robinson | ||
|rank=species | |rank=species | ||
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|publication year=1973 | |publication year=1973 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V4/V4_231.xml |
|subfamily=Cactaceae subfam. Opuntioideae | |subfamily=Cactaceae subfam. Opuntioideae | ||
|genus=Grusonia | |genus=Grusonia | ||
Latest revision as of 21:57, 5 November 2020
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 red-brown, longest 3–5.5 cm; major 2–3 abaxial spines erect and red-brown, 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 red-brown, ± 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
N.Mex., Tex., Mexico (Chihuahua, Durango).
Discussion
Selected References
None.