Trifolium mucronatum |
Trifolium lupinaster |
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cusp clover |
lupine clover |
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Habit | Herbs perennial, 15–50 cm, glabrous or curly-pilose. | |
Stems | erect, unbranched or branched distally. |
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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. |
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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. |
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Peduncles | 1–5 cm. |
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Pedicels | erect or horizontal, 1–3 mm; bracteoles broadly shell-shaped, sometimes connate into lobed ridge, to 0.5 mm. |
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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. |
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Legumes | oblong, 6–8 mm. |
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Seeds | 3–6, dark brown or gray-brown, globose-reniform, 1.5–2 mm, slightly roughened, dull. |
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The | difficulty of distinguishing Trifolium mucronatum from T. wormskioldii is discussed under 33. T. wormskioldii. |
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Populations | in the United States represent T. mucronatum subsp. lacerum; in Mexico, subsp. lacerum is found in the north, subsp. mucronatum (petals pink or reddish, flowers 1.5–1.7 cm, inflorescences 2.5–3.5 cm diam.) is widespread, and subsp. vaughanae J. |
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m | .; m . |
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Gillett | (petals lavender or white, flowers 1.2–1.4 cm, inflorescences 1.5–2 cm diam.) is restricted to central Mexico (Guanajuato, San Luis Potosí) (J.; gillett 1980). |
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2n | = 16, 32, 40, 48. |
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Trifolium mucronatum |
Trifolium lupinaster |
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Phenology | Flowering Jun. | |
Habitat | Forest glades, meadows. | |
Elevation | 0–400 m. (0–1300 ft.) | |
Distribution |
w United States; sc United States; n Mexico
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AK; Asia (n China, Russia) [Introduced in North America] |
Discussion | Subspecies 3 (1 in the flora). Trifolium involucratum Ortega (1797), which pertains here, is a later homonym of T. involucratum Lamarck (1778, = T. cherleri Linnaeus). (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 | ||
Subordinate taxa | ||
Synonyms | Lupinaster pentaphyllus, Pentaphyllon lupinaster | |
Name authority | Willdenow ex Sprengel: Syst. Veg. 3: 208. (1826) | Linnaeus: Sp. Pl. 2: 766. (1753) |
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