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

36. Sedum oblanceolatum R. T. Clausen, Sedum N. Amer. 404, figs. 113, 114. 1975.

Herbs, perennial, cespitose, glabrous. Stems rootstocks, erect, branched from base, bearing rosettes. Leaves alternate, erect, sessile; blade green, appearing whitish because of pruinose covering, margins green, not white, strongly pruinose, not glaucous, narrowly obovate, laminar, 7-38 × 5-9 mm, base spurred, not scarious, apex usually obtuse to truncate, sometimes emarginate. Flowering shoots erect, simple, 6-15 cm; leaf blades oblanceolate-oblong, base short-spurred; offsets not formed. Inflorescences dense, paniculate cymes, 30-60-flowered, 7-9-branched; branches not recurved, somewhat forked; bracts similar to leaves, smaller. Pedicels 3-5 mm. Flowers 5-merous; sepals erect, connate basally, green, appearing blue-green, glaucous, lanceolate-oblong, equal, 4-7 × 1.5-3.2 mm, apex acute, (papillose); petals erect, connate basally, creamy white, oblong, not carinate, 8.5-11.5 mm, apex acute, mucronate; filaments white, becoming reddish; anthers yellow; nectar scales yellow, transversely oblong. Carpels erect in fruit, connate basally, brown. 2n = 30.

Flowering summer. Rocky slopes, in crevices, edges of rocks; 400-1600 m; Calif., Oreg.

Sedum oblanceolatum is restricted to the upper Klamath and Applegate river basins in Jackson County, Oregon, and Siskiyou County, California. Represented by relatively few individual plants, it occurs on a wide range of substrates including phyllite-schist, schist, metavolcanics, metasedimentary, as well as ultramafics like serpentine, soapstone, and peridotite. It is of conservation concern in California.


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