Sedum oreganum |
Sedum nanifolium |
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Oregon stonecrop |
dwarf stonecrop |
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Habit | Herbs, perennial, multi-stemmed from base, glabrous. | Herbs, perennial, mat-forming, glabrous. | ||||
Stems | rootstocks and decumbent branches, (stout), bearing terminal rosettes. |
procumbent, becoming erect, (reddish-shiny proximally), long-branched, not bearing rosettes. |
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Flowering shoots | erect, simple or branched, 8–13 cm; leaf blades spatulate or cuneate, base short-spurred; offsets not formed. |
erect, simple or branched, 2–4 cm; leaf blades orbiculate to broadly ovate, base not spurred; offsets not formed. |
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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, (densely set), erect to slightly spreading, sessile; blade green with prominent red dots, not glaucous, sometimes waxy, orbiculate to broadly obovate, semiterete, 2.5–3.5(–5) × 2–2.5 mm, base not spurred, not scarious, apex rounded to acute. |
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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. |
subscorpioid cymes, 10–20-flowered, simple to 2-branched; branches erect to spreading or recurved, sometimes forked; bracts oblong, ca. 3 mm, base broadly spurred. |
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Pedicels | absent or 0.4–3+ mm. |
absent. |
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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 suberect, distinct basally, greenish, sometimes with reddish striations, subovate, unequal, 2–2.5 × 0.1–1.6 mm, apex obtuse, (papillose); petals erect to spreading, distinct, yellow with prominent, short, longitudinal red stripes, lanceolate, carinate, 4.5–5 mm, apex subobtuse, narrowly mucronate; filaments whitish or pale yellow; anthers yellow; nectar scales inconspicuous. |
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Carpels | erect in fruit, connate basally, light brown or yellow. |
spreading in fruit, distinct, tan or brown with reddish striations. |
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2n | = 24. |
= 52, 53, 104. |
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Sedum oreganum |
Sedum nanifolium |
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Phenology | Flowering late spring–early winter. | |||||
Habitat | Limestone gravel or outcrops in various vegetation | |||||
Elevation | 1300-2000 m (4300-6600 ft) | |||||
Distribution |
AK; CA; OR; WA; BC
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TX; Mexico (Chihuahua, Coahuila, Nuevo León) |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sedum nanifolium is found in the Del Norte Mountains of Brewster County. The long-branched (to 20 cm), reddish-shiny stems are distinctive; see discussion under 19. S. robertsianum. (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. 211. | ||||
Parent taxa | Crassulaceae > Sedum | Crassulaceae > Sedum | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Gormania oregana | S. parvum subsp. nanifolium | ||||
Name authority | Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 559. (1840) | Fröderström: Acta Horti Gothob. 10(app.): 96, figs. 736–746, plate 61. (1936) | ||||
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