Graptopetalum rusbyi

(Greene) Rose

Addisonia 9: 31. 1924,.

Basionym: Cotyledon rusbyi Greene
Synonyms: Echeveria rusbyi (Greene) A. Nelson & J. F. Macbride Graptopetalum orpetii E. Walther
Treatment appears in FNA Volume 8. Treatment on page 227. Mentioned on page 228.
Revision as of 18:06, 18 September 2019 by FNA>Volume Importer

Stems with ascending, slender branches, 3–10 mm thick. Leaves: rosettes densely ces-pitose, 10–50-leaved, 2–6(–10) cm diam.; blade green or reddish, rhombic-obovate to oblanceolate, 1.5–5 × 0.8–1.8 cm, rough (especially on margins and keel with peglike or subclavate papillae 0.05–0.1 mm and often narrower), apex with slender apiculum 1–3 mm, surfaces not glaucous. Inflorescences mostly flat cymes; floral stems 0.4–1.8 dm; proximal leaves 2–18 mm; branches mostly 2–5, circinate or not, 1–12-flowered. Pedicels mostly 3–8 mm. Flowers (5–)6–7(–8)-merous; corolla 14–21 mm diam., tube [0.7–]2–3.5 mm, lobes 7–10.5 × 1.2–2.5 mm; pistils not hollowed near base, gradually narrowed to styles 1–1.5 mm. 2n = 62, 63, 64, 66, ca. 93, 124.


Phenology: Flowering late spring.
Habitat: Rock crevices especially on north slopes and on shaded cliffs (at least at lower elevations)
Elevation: [0-]600-1700 m

Distribution

V8 475-distribution-map.gif

Ariz., Mexico (Chihuahua, Sinaloa, Sonora).

Discussion

Southward in Mexico, the corolla tube in Graptopetalum rusbyi tends to be shorter. The Mexican plants have been confused with G. occidentale Rose of Sinaloa (R. V. Moran 1984).

Lower Taxa

None.
... more about "Graptopetalum rusbyi"
Reid V. Moran +
(Greene) Rose +
Cotyledon rusbyi +
Ariz. +, Mexico (Chihuahua +, Sinaloa +  and Sonora). +
[0-]600-1700 m +
Rock crevices especially on north slopes and on shaded cliffs (at least at lower elevations) +
Flowering late spring. +
moran1984a +
Echeveria rusbyi +  and Graptopetalum orpetii +
Graptopetalum rusbyi +
Graptopetalum +
species +