31.
Sedum mexicanum
Britton, Bull. New York Bot. Gard. 1: 257. 1899.
Herbs,
perennial, tufted, glabrous.
Stems
decumbent, branched, not bearing rosettes.
Leaves
in whorls of 4(-5), spreading, sessile; blade bright green, not glaucous, linear-elliptic or linear-lanceolate, subterete, 8-20 × 1.9-3 mm, base spurred, not scarious, apex blunt.
Flowering shoots
erect, branched, 8.5-20 cm; leaf blades linear-elliptic or linear-lanceolate, base spurred; offsets not formed.
Inflorescences
cymes, 20-50+-flowered, 3-branched; branches scorpioid, 2-forked; bracts similar to leaves, smaller.
Pedicels
absent.
Flowers
5-merous; sepals spreading, distinct basally, green, lanceolate, unequal, 3.3-4.7 × 0.9-1.6 mm, apex acute; petals widely spreading, distinct, golden yellow, elliptic, not carinate, 3.3-4.8 mm, apex acute; filaments yellowish; anthers yellow; nectar scales pale yellow, obovate- to spatulate-subquadrate.
Carpels
erect, distinct, yellowish green.
2
n
= 36.
Flowering summer. Disturbed areas; 0-100 m; introduced; Fla.; Mexico; Central America; South America (Colombia); Europe (France, Spain); Asia (Japan, Taiwan).
Sedum mexicanum
was described from a specimen collected in Mexico; its closest relatives are in eastern Asia and it may have originated there.
