Graptopetalum
General Information   |   Species   |   Hybrids

RUSBYI   (Greene) Rose, 1924

Synonyms :

Cotyledon rusbyi  Greene (1883) / Dudleya rusbyi  (Greene) Britton & Rose (1903) / Echeveria rusbyi  (Greene)  Nelson & Macbride (1913)

Graptopetalum orpetii   E. Walther (1930)

 

Distribution : USA (C and S Arizona), Mexico (Sonora, W Chihuahua, NW Sinaloa); esp. north-exposed shaded slopes and cliffs, up to 1600 m.

 

 

Description (according to J. Thiede in IHSP, 2003) :

 

Rosette plants; main root thickened to 8 mm diam.

 

Stems erect, short, to 1.5 cm, branching from below the rosette.

 

Rosette flattened, 2 – 6 (-10) cm in diam., with 10 – 35 (-50) condensed leaves, normally mat-forming.

 

Leaves rhombic to obovate to oblanceolate, acute or acutish, 1.5 – 5 x 0.6 – 1.5 cm, 1 – 5 mm thick, pale green or reddish to violet, mucro 1 – 3 mm, at least upper ½ of the leaves papillose.

 

Inflorescences 4 – 17 cm, shell-pink or ± violet, thyrses with 2 – 5 spreading 2-branched or mostly zigzag scorpioid 1 – 9 cm long branches, these spreading or young coiled, with 2 – 9 (-12) flowers, middle branches with 1 – 4 secondary branches which can again branch, pedicels (1-) 3 – 8 (- 13) mm.

 

Flowers (5- to) 6- to 7- (to 10-) merous, calyx cup-shaped, 2.5 – 4 (-6) x 3 – 6 (-8) mm, sepals appressed or upcurved, almost free, elliptic, acute, mucronate, somewhat unequal, 2.5 – 6 x 0.7 – 1.8 mm, corolla 14 – 21 mm in diam., petals narrowly triangular-lanceolate, 7 – 10,5 x 1.2 – 2 (-2.5) mm, yellowish-white (white or greenish), tube bowl-shaped, 0.7 – 3.5 x 3 – 4 mm, lobes somewhat acute, with 6 – 8 dark red cross-stripes, more conspicuous and denser in the apical ½.

 

Cytology : n = 31, 32, 33, 62, ± 93

Note :

Habitat : North exposed shaded cliffs means that the plants dislike hot greenhouses !

 

 

Graptopetalum rusbyi in habitat in Gila County AZ, east of Superior :








Photos Peter Breslin


Plants in cultivation :




Photos Noelene Tomlinson


Photo Joan Steele





Photos Margrit Bischofberger


Photo Emmanuelle Aubé





G. rusbyi (Municipio Yecora, Sonora, Mexico)
Photos Bernie DeChant




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