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FNA | Family List | FNA Vol. 8 | Crassulaceae | Sedum

37. Sedum oregonense (S. Watson) M. Peck, Man. Higher Pl. Oregon. 361. 1941.

Cotyledon oregonensis S. Watson, Proc. Amer. Acad. Arts 17: 373. 1882

Herbs, perennial, cespitose or not, glabrous. Stems rhizomes, horizontal, much-branched, bearing rosettes. Leaves alternate, ascending to spreading, sessile to subsessile; blade green, glaucous, not strongly pruinose, obovate or oblanceolate, subterete, 10-36 × 5-16 mm, base not spurred, not scarious, apex emarginate to retuse. Flowering shoots erect, simple, (6-)10-28 cm; leaf blades suborbiculate or obovate, base not spurred; offsets not formed. Inflorescences panicles, 10-120-flowered, 3-20-branched; branches not recurved, dichotomously forked; bracts similar to leaves, smaller. Pedicels 2-5 mm. Flowers 5-merous; sepals (persistent, closely appressed to corolla tube), erect, connate basally, greenish, ovate, equal, 3.2-3.5 × 1-3 mm, apex subacute; petals (persistent until fruiting), erect basally, divergent apically, connate basally, creamy white, yellowish white, or pale yellow, elliptic-oblong or oblanceolate-oblong, cucullate, 5-9(-11.5) mm, apex abruptly pointed; filaments pale yellow; anthers yellow; nectar scales white or yellow, subreniform. Carpels erect in fruit, distinct, brown, (strongly 5-veined). 2n = 90.

Flowering spring-summer. Gravel, mats of Selaginella or moss on rocky slopes and ledges, crevices of cliffs; 900-2200 m; Calif., Oreg.


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