Sedum stenopetalum |
Sedum acre |
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narrow leaf stonecrop, narrow-petal stonecrop, worm-leaf stonecrop |
goldmoss stonecrop, moss stonecrop, mossy stonecrop, orpin acre, orpin âcre, wall-pepper |
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Habit | Herbs, annual, biennial, or weakly perennial, tufted or not, glabrous. | Herbs, perennial, mat-forming, glabrous. | ||||
Stems | decumbent, branched, bearing terminal rosettes. |
trailing (nonflowering shoots ascending at tip), laxly branched, not bearing rosettes. |
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Flowering shoots | erect, branched, 10–43 cm; leaf blades linear, base with scarious spurs; offsets rosettes, produced from axils of leaves and bracts. |
erect, usually simple, 5–10(–15) cm; leaf blades triangular-ovate, base short-spurred; offsets not formed. |
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Leaves | alternate, spreading to erect, sessile; blade green, not glaucous, linear to elliptic-oblong (subulate when dry), subterete, 4.3–13.8 × 1.4–2.7 mm, base (persistent), spurred (spur simple, small), scarious, apex acute, (surfaces sometimes papillose marginally). |
(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. |
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Inflorescences | solitary flowers or cymes, 9–15(–25)-flowered, mostly 3-branched; branches slightly recurved, not forked; bracts linear-lanceolate, smaller than leaves, base spurred. |
cymes, 2–12-flowered or flowers solitary, monochasially (1–)2(–3)-branched; branches not recurved, rarely forked; bracts similar to leaves, smaller. |
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Pedicels | absent or to 0.5 mm. |
absent or to 1 mm. |
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Flowers | 5-merous; sepals erect, distinct, pale green or yellow-green, lanceolate or ovate, equal, 2–3.7 × 0.9–1.7 mm, apex acute or long-acuminate; petals stellately spreading, distinct, deep yellow with green to brown dorsal keel to almost white, lanceolate or elliptic, slightly carinate, 5.4–8 mm, apex obtuse, acute, or long-acuminate, sometimes with aristate appendage; filaments yellow; anthers yellow; nectar scales greenish yellow or yellowish white, reniform-subquadrate or square. |
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. |
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Carpels | divergent in fruit, shortly connate, pale green, yellow-green, or brown. |
stellately patent in fruit, distinct, yellowish. |
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2n | = 50–54, 58, 62–70, 63–64. |
= 40, 60, 80, 100, 120. |
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Sedum stenopetalum |
Sedum acre |
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Phenology | Flowering spring. | |||||
Habitat | Rock outcrops, rock walls, calcareous habitats, disturbed sites | |||||
Elevation | 0-2400 m (0-7900 ft) | |||||
Distribution |
CA; ID; MT; OR; WA; WY; AB; BC
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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 | Varieties 2 (2 in the flora). Mature follicles of Sedum stenopetalum are finely papillose, with prominent lips along the adaxial suture. Petal number can range from three to eight. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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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Key |
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Source | FNA vol. 8, p. 209. | FNA vol. 8, p. 215. | ||||
Parent taxa | Crassulaceae > Sedum | Crassulaceae > Sedum | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Amerosedum stenopetalum | S. elrodii | ||||
Name authority | Pursh: Fl. Amer. Sept. 1: 324. (1813) | Linnaeus: Sp. Pl. 1: 432. 1753 , | ||||
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