Sedum

MACDONALDII Nesom, 1996

Type : Andrew McDonald 2135, collected Nuevo Léon, Mpio Galeana, Sierra La Marta, S and SE sides at the top, alpine and subalpine Zone, 22 Aug 1986, Mexico. (Holotype TEX).

 

Distribution : Mexico (Coahuila: Sierra Coahuilón, Sierra La Viga; Nuevo Léon: Cerro Potosí and Sierra La Marta); subalpine and alpine zones, 2850 - 3600 m.

 

Description (by U. Eggli in IHSP, 2003) :

 

Erect, perennial herbs with fibrous roots, 4 – 7 cm tall.

 

Stems mostly hidden by the leaves, surface with low papillae and square cells in lines.

 

Leaves semiterete, flat above with a median groove, both faces minutely striate-papillate with clearly visible cellular structure.

 

Flowering branch as in S. parvum.

 

Flowers : Petals yellow, erect, 6 – 7 mm.

 

 

Another member of the S. parvum group (Nesom & Turner 1996) and compared with S. catorce and S. papillicaulum in the protologue, and most closely related to the latter.

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