Trifolium owyheense |
Trifolium lupinaster |
|
---|---|---|
Owyhee clover |
lupine clover |
|
Habit | Herbs perennial, 10–20 cm, glaucous, glabrous. | Herbs perennial, 15–50 cm, glabrous or curly-pilose. |
Stems | cespitose, spreading, branched proximally, sparsely branched distally. |
erect, unbranched or branched distally. |
Leaves | palmate; stipules broadly obovate, 1–2 cm, fused at base, margins slightly lobed, apex acute; petiole 2–6 cm; petiolules 1–1.5 mm; leaflets 3, blades ovate, obovate, or orbiculate, slightly overlapping, 1–2 × 0.7–2.3 cm, base truncate to rounded, veins prominent, margins sparsely dentate, apex rounded, emarginate, surfaces glabrous. |
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, 20–30-flowered, globose, usually formed of 2 sessile heads, 2.5–5 × 2.5–5 cm; involucres absent. |
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 | 3–7 cm, surpassing subtending leaves. |
1–5 cm. |
Pedicels | erect, reflexed in proximalmost flowers, 1 mm; bracteoles cuplike, 0.5 mm. |
erect or horizontal, 1–3 mm; bracteoles broadly shell-shaped, sometimes connate into lobed ridge, to 0.5 mm. |
Flowers | 15–21 mm; calyx tubular-campanulate, 9–12 mm, pilose, veins 10, tube 4.5–6 mm, lobes subequal, abaxialmost longest, subulate, orifice open; corolla deep pink or magenta, 20–23 mm, banner tubular for most their length, 18–22 × 5–7 mm, apex flared. |
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 | ellipsoid, 4–5 mm. |
oblong, 6–8 mm. |
Seeds | 1 or 2, yellow-mottled, mitten-shaped, 2–3 mm, smooth. |
3–6, dark brown or gray-brown, globose-reniform, 1.5–2 mm, slightly roughened, dull. |
2n | = 16, 32, 40, 48. |
|
Trifolium owyheense |
Trifolium lupinaster |
|
Phenology | Flowering May–Jun. | Flowering Jun. |
Habitat | Dry shale hillsides on diatomaceous earth. | Forest glades, meadows. |
Elevation | 1000–2000 m. (3300–6600 ft.) | 0–400 m. (0–1300 ft.) |
Distribution |
ID; OR
|
AK; Asia (n China, Russia) [Introduced in North America] |
Discussion | Trifolium owyheense is known from about 40 populations in a small portion of east-central Malheur County in Oregon, and immediately adjacent Owyhee County in Idaho (M. Mancuso 2001). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Trifolium | Fabaceae > subfam. Faboideae > Trifolium |
Sibling taxa | ||
Synonyms | Lupinaster pentaphyllus, Pentaphyllon lupinaster | |
Name authority | Gilkey: Madroño 13: 169, fig. 1. (1956) | Linnaeus: Sp. Pl. 2: 766. (1753) |
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