Sedum oreganum |
Sedum borschii |
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Oregon stonecrop |
borsch stonecrop |
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Habit | Herbs, perennial, multi-stemmed from base, glabrous. | Herbs, perennial, tufted, glabrous. | ||||
Stems | rootstocks and decumbent branches, (stout), bearing terminal rosettes. |
decumbent, lateral branches from proximal axils, rosettes formed in proximal axils (giving rise to flowering shoots). |
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Flowering shoots | erect, simple or branched, 8–13 cm; leaf blades spatulate or cuneate, base short-spurred; offsets not formed. |
ascending, appearing angled when dry, simple or branched, 4.7–6 cm; leaf blades elliptic-oblong or oblanceolate, base not spurred; offsets axillary rosettes only basally. |
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Leaves | alternate, spreading, sessile; blade lustrous light green, not glaucous, spatulate or cuneate, laminar (thickest near apex), 7–12 × 4.4–9 mm, base short-spurred, not scarious, apex broadly rounded or truncate. |
alternate, (loosely imbricate), divergent, sessile; blade green, not glaucous, obovate or elliptic, rarely lanceolate, subterete, 4.7–7.5 × 2.5–3.4 mm, base not spurred, not scarious, apex obtuse, (surfaces finely papillose marginally). |
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Inflorescences | dense corymbs, 5–10-flowered, 3-branched; branches spreading to erect, primary branch dichotomously forked; bracts spatulate or oblanceolate, 5–8 mm, base spurred. |
cymes, 3–15-flowered, 2–3-branched; branches not or only slightly recurved, not forked; bracts (2–3), similar to leaves, smaller. |
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Pedicels | absent or 0.4–3+ mm. |
absent or to 0.1 mm. |
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Flowers | 5-merous; sepals erect, connate basally, green, ovate-lanceolate, equal, ca. 3.5 × 2 mm, apex acuminate or acute; petals erect or erect basally and divergent distally, connate basally, yellow, narrowly lanceolate, carinate, ca. 10.5 mm, apex aristate; filaments yellowish or greenish; anthers yellow; nectar scales yellow, subquadrate to spatulate or oblong. |
5-merous; sepals erect, basally connate, yellow-green, ovate, equal, ca. 2 × 15 mm, apex acute or obtuse; petals widely spreading, distinct, yellowish green, lanceolate-elliptic, not carinate, 5–6.5 mm, apex acute with minute mucronate appendage; filaments yellow; anthers yellow; nectar scales yellow to orange, rarely pale yellow to greenish white, square or ± square. |
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Carpels | erect in fruit, connate basally, light brown or yellow. |
widely divergent in fruit, connate basally, brown. |
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2n | = 24. |
= 32, 43–51, 45–54, 50. |
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Sedum oreganum |
Sedum borschii |
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Phenology | Flowering spring–summer. | |||||
Habitat | Cliffs and rocky slopes on a variety of rocks, sites which are too hot and dry for trees | |||||
Elevation | 1200-2200 m (3900-7200 ft) | |||||
Distribution |
AK; CA; OR; WA; BC
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ID; MT |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The mature carpels of Sedum borschii have prominent lips along the adaxial suture. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 221. | FNA vol. 8, p. 210. | ||||
Parent taxa | Crassulaceae > Sedum | Crassulaceae > Sedum | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Gormania oregana | S. leibergii var. borschii | ||||
Name authority | Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 559. (1840) | (R. T. Clausen) R. T. Clausen: Sedum N. Amer., 298. (1975) | ||||
Web links |