Trifolium lupinaster |
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lupine clover |
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Habit | Herbs perennial, 15–50 cm, glabrous or curly-pilose. |
Stems | erect, unbranched or branched distally. |
Leaves | palmate; stipules adnate entire length of petiole, sheathing, lanceolate-oblong, 0.8–1.3 cm, margins sharply and finely serrate, pilose, apex acute; petiole 0.5–0.7 cm; petiolules 0.5 mm; leaflets (3–)5(–9), blades elliptic to linear-elliptic, 1–4 × 0.3–1.4 cm, base cuneate, veins prominent, cartilagenous, ending in sharp, curved teeth, margins setaceous, apex acute to obtuse, surfaces glabrous except midrib abaxially. |
Inflorescences | terminal or axillary, 10–30-flowered, hemispheric or globose, 1.7–2.3 × 2.7–3.3 cm; involucres oblique, to 0.5 mm, wavy to toothed. |
Peduncles | 1–5 cm. |
Pedicels | erect or horizontal, 1–3 mm; bracteoles broadly shell-shaped, sometimes connate into lobed ridge, to 0.5 mm. |
Flowers | 11–17 mm; calyx campanulate, oblique, 6–9 mm, glabrous or sparsely hairy distally and along veins, veins 10, tube 3 mm, lobes subequal, pilose, abaxial slightly longer, subulate, orifice open; corolla white to rose-purple, 10–15 mm, banner rolled into open tube, arched upwards distally, 10–15 × 4–5 mm, apex broadly rounded or acute, apiculate. |
Legumes | oblong, 6–8 mm. |
Seeds | 3–6, dark brown or gray-brown, globose-reniform, 1.5–2 mm, slightly roughened, dull. |
2n | = 16, 32, 40, 48. |
Trifolium lupinaster |
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Phenology | Flowering Jun. |
Habitat | Forest glades, meadows. |
Elevation | 0–400 m. (0–1300 ft.) |
Distribution |
AK; Asia (n China, Russia) [Introduced in North America] |
Discussion | Populations of Trifolium lupinaster in Alaska appear to have been introduced as a potential forage crop and spread from cultivation (D. F. Murray and H. F. Drury 1974). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. |
Parent taxa | |
Sibling taxa | |
Synonyms | Lupinaster pentaphyllus, Pentaphyllon lupinaster |
Name authority | Linnaeus: Sp. Pl. 2: 766. (1753) |
Web links |