CATORCE Nesom, 1996
Synonym : Sedum parvum ssp. dendroides Clausen (1978)
Type : Clausen 772028, San Luis Potosí, Mexico, Aug 23, 1977.
Distribution : Mexico (San Luis Potosí : near Real de Catorce), quarzite cliff, 2620 cm, known from the type locality only.
Description (by U. Eggli in ISHP, 2003) :
Erect to semi-erect (rarely somewhat pendent) perennials, 10 – 25 cm tall, slightly glaucous.
Roots probably tuberous.
Stems strongly woody, reddish, minutely papillate, not shiny.
Leaves all of similar size, lanceolate-oblong, flat but with swollen base, (3-) 3.5 – 5 x 1.3 – 2 mm, dark green with prominent white margins, venation usually clearly visible.
Flowering branch and flowers as in S. parvum.
Petals erect to spreading or reflexed, 6 – 7 mm, yellow.
Another member of the S. parvum group (Nesom & Turner 1996).