OBTUSATUM Gray, 1868
Synonyms :
Gormania obtusata (Gray) Britton (1903) / Cotyledon obtusata (Gray) Fedde (1904) / Echeveria obtusata (Gray) Nelson & Macbride (1913)
Gormania burnhamii Britton (1903) / Cotyledon burnhamii (Britton) Fedde (1904) / Sedum burnhamii (Britton) Berger (1930)
Gormania hallii Britton (1903) / Sedum hallii (Britton) Praeger (1921) / Sedum obtusatum var. hallii (Britton) Smiley (1921) / Echeveria hallii (Britton) Berger (1930)
Cotyledon yosemitense Fedde (1904)
Echeveria brittonii Nelson & Macbride (1913)
Sedum rubroglaucum Praeger (1919)
Sedum obtusatum ssp. typicum R.T.Clausen (1940)
Subgenus Gormania
Distribution : W USA (California : C Sierra Nevada N-wards to the Klamath Mts.), on granite to diorite outcroppings, mostly on W slopes, 1370 - 3660 m.
Description (by 't Hart & Bleij in IHSP, 2003) :
Glabrous perennial herbs with elongate stout branched rootstocks with a terminal rosette, offsets axillary.
Leaves alternate, oblanceolate or spatulate, rounded or truncate, obscurely mucronate, retuse or emarginate, 6 - 22 x 4 - 10 mm, green, blue-green, green suffused with red or red.
Flowering branches ascending, terminal or axillary, 1.6 - 11 cm.
Inflorescences panicles, bracts spatulate to linear-oblong, ± 1.5 mm.
Flowers 5-merous, sepals broadly sessile, basally slightly connate, ovate or lanceolate, acute or obtuse, slightly subterete, glaucous, ± 4 x 2 mm, pale green or purplish, erect, petals basally connate, convolute in bud, oblanceolate-oblong, spatulate or obovate, abruptly mucronate, erose at the upper margins, white to yellow, ± 7.5 mm, spreading above the middle, filaments white or yellow, anthers yellow.
Note :
1. The former Sedum obtusatum ssp. boreale has been reclassified as species and named S. kiersteadiae.
2. The former Sedum obtusatum ssp. paradisum has been reclassified as a species : S. paradisum, published in Phytotaxa 368 (1): 1-61, 2018.
3. The former Sedum obtusatum ssp. retusum has also been reclassified as a species : S. sanhedrinum, published in Phytotaxa 368 (1): 1 - 61, 2018.