Trifolium dasyphyllum |
Trifolium glomeratum |
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alpine clover |
cluster clover |
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Habit | Herbs perennial, 5–20 cm, appressed-pubescent. | Herbs annual, 10–30 cm, glabrous. |
Stems | cespitose, branched, numerous short stems. |
procumbent, decumbent, or ascending, branched. |
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 ovate, 1–1.5 cm, margins entire, apex subulate-setaceous; petiole 0–7 cm; petiolules to 0.5 mm; leaflets 3, blades obovate or obcordate, 0.6–1.5 × 0.4–1 cm, base cuneate, veins thickened distally, margins spinulose-serrate, apex retuse or rounded, surfaces glabrous. |
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. |
axillary, 30+-flowered, globose, 0.8–1 × 0.8–1 cm; involucres absent. |
Peduncles | 2–17 cm. |
absent or to 0.1 cm. |
Pedicels | erect, 1.5–2 mm; bracteoles linear-lanceolate, scarious, 2–6 mm, or scalelike. |
straight, to 0.2 mm; bracteoles linear, to 0.5 mm. |
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. |
6–8.5 mm; calyx tubular-obconic, 3–4 mm, glabrous, veins 10–12, tube 1.5–2 mm, lobes equal, triangular-ovate, spreading to recurved in fruit, orifice open; corolla pink, 6–8 mm, banner obovate, 6–8 × 1–2 mm, apex acute. |
Legumes | oblong, 4–6 mm. |
obovoid, 2–3 mm. |
Seeds | 1–3, dark brown, ovoid-reniform, 2–2.5 mm, smooth. |
2, brown, reniform, 1 mm, tuberculate. |
2n | = 16. |
= 14, 16. |
Trifolium dasyphyllum |
Trifolium glomeratum |
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Phenology | Flowering Jun–Aug. | Flowering May–Jun. |
Habitat | Alpine meadows, rocky slopes. | Roadsides, lawns, thin grasslands. |
Elevation | 2100–4100 m. (6900–13500 ft.) | 0–500 m. (0–1600 ft.) |
Distribution |
CO; MT; NM; UT; WY
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AL; CA; OR; SC; TX; BC; Europe; n Africa [Introduced in North America; introduced also in s South America, s Africa, Pacific Islands (New Zealand), Australia]
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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.) |
Trifolium glomeratum is cultivated occasionally as a forage crop (F. J. Hermann 1953) and sometimes spreads. (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 | 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) | Linnaeus: Sp. Pl. 2: 770. (1753) |
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