Trifolium dasyphyllum |
Trifolium plumosum |
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alpine clover |
plumed clover |
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Habit | Herbs perennial, 5–20 cm, appressed-pubescent. | Herbs perennial, 10–60 cm, villous. | ||||
Stems | cespitose, branched, numerous short stems. |
erect, branched or unbranched. |
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Leaves | palmate; stipules lanceolate-linear, 1.5–2 cm, margins entire, apex acuminate; petiole 0.6–3.5 cm; petiolules to 0.5 mm; leaflets 3, blades oblong-elliptic, oblanceolate, or obovate, sometimes folded, 0.6–3.2 × 0.2–0.6 cm, base cuneate, veins obscure, margins entire, apex acute, surfaces glabrous or hairy. |
palmate; stipules linear, oblong, or ovate, 1.5–2.5 cm, margins entire or slightly serrulate, apex acute to acuminate; petiole 1–20 cm; petiolules to 0.5 mm; leaflets 3, blades linear, elliptic, oblong, or lanceolate-elliptic, often folded, falcate, 4–11 × 0.1–1.6 cm, base cuneate, veins thickened, margins denticulate, apex acute or acuminate, surfaces villous. |
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Inflorescences | axillary or terminal, 5–16-flowered, globose, 1.5–3.5 × 1.2–3.3 cm; involucres formed of proximal bracteoles, bases sometimes connate. |
terminal, 70–80-flowered, spicate, ovoid to cylindric, 3–6 × 2.5–3 cm; involucres absent. |
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Peduncles | 2–17 cm. |
2–6 cm. |
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Pedicels | erect, 1.5–2 mm; bracteoles linear-lanceolate, scarious, 2–6 mm, or scalelike. |
erect or absent, 0–0.5 mm; bracteoles absent. |
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Flowers | 12–16 mm; calyx campanulate, 6–9 mm, pubescent, veins 10, tube 2–5 mm, lobes unequal, linear-subulate, orifice open; corolla often bicolored cream and violet, sometimes all red-purple or violet, 1.2–1.6 mm, banner broadly elliptic-ovate, 11–15 × 4–5 mm, folded distally, apex rounded, apiculate; ovaries pubescent distally. |
17–18 mm; calyx campanulate, 5 mm, villous, veins 20, tube 2.5 mm, lobes subequal, subulate, straight, orifice open; corolla creamy white, keel petals crimson, 12–22 mm, banner oblong, 12–22 × 3–5 mm, apex acute; ovaries glabrous or pubescent distally. |
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Legumes | oblong, 4–6 mm. |
obovoid, 4–5 mm. |
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Seeds | 1–3, dark brown, ovoid-reniform, 2–2.5 mm, smooth. |
1–3, reddish brown or tan, ellipsoid, 1.8–2 mm, smooth, glossy. |
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2n | = 16. |
= 32. |
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Trifolium dasyphyllum |
Trifolium plumosum |
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Phenology | Flowering Jun–Aug. | |||||
Habitat | Alpine meadows, rocky slopes. | |||||
Elevation | 2100–4100 m. (6900–13500 ft.) | |||||
Distribution |
CO; MT; NM; UT; WY
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nw United States
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Discussion | Three subspecies of Trifolium dasyphyllum were recognized by J. M. Gillett (1965), but he commented on the overlap in diagnostic characters of the subspecies. In their monograph of Trifolium, M. Zohary and D. Heller (1984) mirrored the treatment by Gillett, and also commented on intermediacy of characters in some specimens. The subspecies were not accepted by R. D. Dorn (1988), citing extensive intergradation, or by R. C. Barneby (1989), citing variability within T. dasyphyllum that is not linked with distribution or other morphological features. Trifolium dasyphyllum is found from eastern Utah and from Santa Fe County in New Mexico northward through central Colorado to central and northwestern Wyoming and Cascade, Gallatin, and Madison counties in Montana. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). J. M. Gillett (1972) stated that the leaflet width in the basal leaves is the best distinction between the two subspecies, which are geographically isolated. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||
Parent taxa | Fabaceae > subfam. Faboideae > Trifolium | Fabaceae > subfam. Faboideae > Trifolium | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | T. anemophilum, T. dasyphyllum subsp. anemophilum, T. dasyphyllum subsp. uintense, T. dasyphyllum var. uintense, T. lividum, T. scariosum, T. uintense | |||||
Name authority | Torrey & A. Gray: Fl. N. Amer. 1: 315. (1838) | Douglas in W. J. Hooker: Fl. Bor.-Amer. 1: 130, plate 49. (1831) | ||||
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