Sedum acre |
Sedum oreganum |
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goldmoss stonecrop, moss stonecrop, mossy stonecrop, orpin acre, orpin âcre, wall-pepper |
Oregon stonecrop |
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Habit | Herbs, perennial, mat-forming, glabrous. | Herbs, perennial, multi-stemmed from base, glabrous. | ||||
Stems | trailing (nonflowering shoots ascending at tip), laxly branched, not bearing rosettes. |
rootstocks and decumbent branches, (stout), bearing terminal rosettes. |
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Flowering shoots | erect, usually simple, 5–10(–15) cm; leaf blades triangular-ovate, base short-spurred; offsets not formed. |
erect, simple or branched, 8–13 cm; leaf blades spatulate or cuneate, base short-spurred; offsets not formed. |
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Leaves | (usually deciduous, if persistent, then blade white, soft, papery), alternate, (densely imbricate), spreading, sessile; blade yellow-green, not glaucous, triangular-ovate, terete to semiterete (elliptic in cross section), (2–)5(–8) × 1–4 mm, base obtusely short-spurred, not scarious, apex obtuse. |
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. |
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Inflorescences | cymes, 2–12-flowered or flowers solitary, monochasially (1–)2(–3)-branched; branches not recurved, rarely forked; bracts similar to leaves, smaller. |
dense corymbs, 5–10-flowered, 3-branched; branches spreading to erect, primary branch dichotomously forked; bracts spatulate or oblanceolate, 5–8 mm, base spurred. |
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Pedicels | absent or to 1 mm. |
absent or 0.4–3+ mm. |
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Flowers | 5-merous; sepals erect to spreading, distinct basally, green, oblong-ovate, unequal, 2–3 × 1.3–2.3, mm, apex obtuse; petals spreading, distinct, bright yellow, oblong-ovate to lanceolate, not carinate, 5–9 mm, apex acute to acuminate; filaments yellow; anthers yellow, (oblong); nectar scales yellowish green, square. |
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. |
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Carpels | stellately patent in fruit, distinct, yellowish. |
erect in fruit, connate basally, light brown or yellow. |
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2n | = 40, 60, 80, 100, 120. |
= 24. |
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Sedum acre |
Sedum oreganum |
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Phenology | Flowering spring. | |||||
Habitat | Rock outcrops, rock walls, calcareous habitats, disturbed sites | |||||
Elevation | 0-2400 m (0-7900 ft) | |||||
Distribution |
AL; CO; CT; IA; ID; IL; IN; KY; MA; MD; ME; MI; MN; MT; NC; NH; NJ; NY; OH; OR; PA; RI; SD; TN; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; ON; PE; QC; SK; Asia (Turkey); Greenland; Europe; n Africa [Introduced in South America (Argentina, Chile)]
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AK; CA; OR; WA; BC
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Discussion | Sedum acre is native in Greenland. It is naturalized in North America across the northern United States and southern Canada from Quebec to North Carolina in the east and from British Columbia to Oregon in the west. Sedum elrodii was found near Somers in Flathead County, Montana. It is known only from a fragmental type specimen. R. T. Clausen (1975) considered it a naturalized form of S. acre with ovate leaf blades, basally connate petals, and procumbent and branched stems from a fleshy rootstock. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 215. | FNA vol. 8, p. 221. | ||||
Parent taxa | Crassulaceae > Sedum | Crassulaceae > Sedum | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | S. elrodii | Gormania oregana | ||||
Name authority | Linnaeus: Sp. Pl. 1: 432. 1753 , | Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 559. (1840) | ||||
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