Sedum oregonense |
Sedum acre |
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cream stonecrop, creamy stonecrop |
goldmoss stonecrop, moss stonecrop, mossy stonecrop, orpin acre, orpin âcre, wall-pepper |
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Habit | Herbs, perennial, cespitose or not, glabrous. | Herbs, perennial, mat-forming, glabrous. |
Stems | rhizomes, horizontal, much-branched, bearing rosettes. |
trailing (nonflowering shoots ascending at tip), laxly branched, not bearing rosettes. |
Flowering shoots | erect, simple, (6–)10–28 cm; leaf blades suborbiculate or obovate, base not spurred; offsets not formed. |
erect, usually simple, 5–10(–15) cm; leaf blades triangular-ovate, base short-spurred; offsets not formed. |
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. |
(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. |
Inflorescences | panicles, 10–120-flowered, 3–20-branched; branches not recurved, dichotomously forked; bracts similar to leaves, smaller. |
cymes, 2–12-flowered or flowers solitary, monochasially (1–)2(–3)-branched; branches not recurved, rarely forked; bracts similar to leaves, smaller. |
Pedicels | 2–5 mm. |
absent or to 1 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. |
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. |
Carpels | erect in fruit, distinct, brown, (strongly 5-veined). |
stellately patent in fruit, distinct, yellowish. |
2n | = 90. |
= 40, 60, 80, 100, 120. |
Sedum oregonense |
Sedum acre |
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Phenology | Flowering spring–summer. | Flowering spring. |
Habitat | Gravel, mats of Selaginella or moss on rocky slopes and ledges, crevices of cliffs | Rock outcrops, rock walls, calcareous habitats, disturbed sites |
Elevation | 900-2200 m (3000-7200 ft) | 0-2400 m (0-7900 ft) |
Distribution |
CA; OR
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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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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.) |
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Source | FNA vol. 8, p. 220. | FNA vol. 8, p. 215. |
Parent taxa | Crassulaceae > Sedum | Crassulaceae > Sedum |
Sibling taxa | ||
Synonyms | Cotyledon oregonensis | S. elrodii |
Name authority | (S. Watson) M. Peck: Man. Higher Pl. Oregon, 361. (1941) | Linnaeus: Sp. Pl. 1: 432. 1753 , |
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