Sedum pachyphyllum Rose

Sedum pachyphyllum Rose, Contr. U. S. Nat. Herb. 13: 299. 1911
Perennial, the stems woody at base, much branched, spreading or erect, glabrous throughout, 10-30 cm. high. Leaves closely set, standing almost at right angles to the stem, terete in section, somewhat smaller below, obtuse, a little glaucous, 3-4 cm. long, 8-10 mm. in cross-section; flowering stem weak, about 2 cm. long; inflorescence sessile, cymose; flowers short-pediceled or subsessile; sepals 5, widely spreading, clavate, green, obtuse, somewhat unequal, the longest one 6 mm. long; petals yellow, widely spreading, or even bent backward, 7 mm. long, somewhat keeled on the back, spoon-shaped above; stamens 10, yellow; carpels at first erect, yellow.
Resembling Sedum allantoides, but leaves much less glaucous and flowers yellow instead
of white.
Type locality: Near San Luis, Oaxaca. Distribution: Known only from the type locality.