Sedum
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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.

Cytology : 2n = 30

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.




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