Sedum laxum |
Sedum rupestre |
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rose-flower stonecrop |
crooked yellow stonecrop, Jenny's stonecrop |
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Habit | Herbs, perennial, cespitose or not, glabrous. | Herbs, perennial, somewhat tufted, glabrous (some glandular hairs on inflorescences). | ||||||||||||||||
Stems | root-stocks, ascending, much-branched, bearing rosettes. |
procumbent, rooting, simple, (basally often somewhat woody), bearing rosettes. |
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Flowering shoots | erect or decumbent, simple or branched, 4–30(–40) cm; leaf blades oblanceolate, spatulate, obovate, or suborbiculate, base not spurred; offsets not formed. |
erect or ascending, drooping when young, simple, 15–35 cm; leaf blades linear, base spurred; offsets not formed. |
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Leaves | alternate, erect to spreading, sessile; blade green, glaucous or not, not pruinose, oblanceolate, spatulate, or obovate, subterete or somewhat flattened, 10–50 × (4.5–)6–33 mm, base not spurred, not scarious, apex truncate to rounded or obtuse, emarginate or barely notched. |
alternate, (imbricate), ascending, sessile; blade green, sometimes glaucous, linear to oblong, terete, 10–15 × 1–3 mm, base with truncate spur, not scarious, apex mucronate. |
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Inflorescences | elongate, paniculate cymes, 12–80-flowered, monochasially 3+-branched; branches not recurved, 2-forked; bracts similar to leaves, smaller. |
terminal corymbiform cymes, 15–25+-flowered, monochasially 3–7-branched, (sparsely glandular-hairy); branches recurved, not forked; bracts similar to leaves. |
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Pedicels | 0.6–6.3 mm. |
absent or to 1 mm. |
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Flowers | 5-merous; sepals erect, (closely appressed to corolla tube), slightly connate basally, pale green, ovate or lanceolate, equal, (2–)2.6–5.1 × 2 mm, apex acute or subacute, (rarely obtuse in var. flavidum); petals basally erect, divergent in distal 1/2, connate basally, pink, pinkish white, or white to yellowish white, lanceolate-oblong, oblanceolate-oblong, or elliptic-oblong, not carinate, 4–11 mm, apex obtuse, shortly mucronate or aristate; filaments white, greenish white, or pink; anthers red, reddish purple, red-brown, or yellow; nectar scales white, yellow, or pink, reniform or transversely oblong. |
(5–)7(–9)-merous; sepals erect, connate basally, yellowish green, ovate, equal, 2–3(–3.3) × 1.5–2 mm, apex acute-acuminate, (glabrous or sparsely glandular-pubescent); petals spreading, distinct, yellow, oblong, slightly carinate, 6–7 mm, apex acute; filaments yellow; anthers yellow; nectar scales yellow, transversely oblong. |
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Carpels | erect in fruit, distinct, brown. |
erect in fruit, distinct, brown. |
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2n | = 56, 88, 112, 120. |
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Sedum laxum |
Sedum rupestre |
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Phenology | Flowering spring–summer. | |||||||||||||||||
Habitat | Rock ledges | |||||||||||||||||
Elevation | 0-2000 m (0-6600 ft) | |||||||||||||||||
Distribution |
CA; OR
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GA; IL; IN; MA; ME; NJ; NY; OH; QC; Europe [Introduced in North America]
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Discussion | Varieties 5 (5 in the flora). Sedum laxum is unusual in forming offsets in axils of rosette leaves rather than on a rootstock or creeping stem. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Specimens of waifs of Sedum rupestre are known from as early as 1876 in Massachusetts. It was first reported as cultivated in the United States in 1914. Most naturalized records of S. rupestre in North America have been incorrectly named S. reflexum. Sedum rupestre is ephemeral on Prince Edward Island, probably not truly established, and is a garden escape in Ontario. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 218. | FNA vol. 8, p. 214. | ||||||||||||||||
Parent taxa | Crassulaceae > Sedum | Crassulaceae > Sedum | ||||||||||||||||
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Subordinate taxa | ||||||||||||||||||
Synonyms | Gormania laxa | S. reflexum | ||||||||||||||||
Name authority | (Britton) A. Berger: in H. G. A. Engler et al., Nat. Pflanzenfam. ed. 2, 18a: 451. (1930) | Linnaeus: Sp. Pl. 1: 431. (1753) | ||||||||||||||||
Web links |