Trifolium tomentosum |
Trifolium andinum |
|
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woolly clover |
Great Divide clover, intermountain clover |
|
Habit | Herbs annual, 10–20 cm, glabrous or sparsely hairy. | Herbs perennial, 5–15 cm, pubescent. |
Stems | prostrate, ascending, or erect, branched. |
erect or ascending, cespitose, much-branched. |
Leaves | palmate; stipules ovate or triangular-lanceolate, 0.4–1.2 cm, margins entire, apex acute or acuminate; petiole 0.5–7 cm; petiolules to 1 mm; leaflets 3, blades obovate, obcordate, or elliptic, 0.4–1.5 × 0.3–1 cm, base cuneate, veins moderately prominent, margins denticulate, apex rounded or emarginate, surfaces sparsely hairy abaxially, glabrous adaxially. |
palmate; stipules oblanceolate, 0.5–1.4 cm, margins entire, apex acute-acuminate; petiole 0.5–4 cm; petiolules to 0.1 mm; leaflets 3, blades oblanceolate, often folded, 0.4–1.5 × 0.2–0.4 cm, base cuneate, veins obscure, margins subentire to denticulate distally, apex acute, mucronulate, surfaces villous. |
Inflorescences | axillary, 10–20-flowered, subglobose, soon becoming globose, flowers resupinate, calyces densely white-woolly, compacted, inflated, 0.5–1.5 × 0.5–1.5 cm; involucres a narrow rim, 0.2 mm. |
terminal, usually formed of 2 sessile heads, 15–25-flowered, globose, 0.8–2 × 0.6–1.5 cm; involucres absent, distal stipules and leaves sometimes forming involucrelike structure. |
Peduncles | 0.5–1.5 cm. |
between distal leaves or involucrelike structure and inflorescences 0.5–6 cm. |
Pedicels | slightly reflexed, to 0.5 mm; bracteoles cup-shaped, membranous, 0.2 mm. |
straight, (0–)1–2 mm; bracteoles broadly ovate, truncate, membranous, to 0.5 mm. |
Flowers | 3–7 mm; calyx tubular, inflated in fruit, markedly asymmetric-bilabiate, 2–6 mm, woolly adaxially, veins 5–10, connected by lateral veins, tube 1.5–2.5 mm, 4–5 mm in fruit, lobes unequal, subulate, shorter than tube, adaxial spreading or curved, orifice open, abruptly constricted in fruit; corolla pink, 3–6 mm, banner ovate, 3–6 × 3–6 mm, apex emarginate to crenulate. |
10–15 mm; calyx tubular-campanulate, 6–9 mm, rough-hairy or glabrous, veins 10, tube 3–6 mm, lobes subequal, subulate, orifice open; corolla light purple, 10–15 mm, banner oblong, 9–13 × 3–4 mm, apex rounded or truncate; ovaries pubescent distally. |
Legumes | ovoid to globose, 2–3 mm. |
ellipsoid, 4–5 mm. |
Seeds | 1 or 2, yellow to brown, mottled, mitten-shaped, 0.9–1.1 mm, smooth, glossy. |
1 or 2, brown, ovoid, 1.5–2 mm, smooth. |
2n | = 16. |
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Trifolium tomentosum |
Trifolium andinum |
|
Phenology | Flowering Feb–Apr. | Flowering May–Jun. |
Habitat | Sandy lawns, fields, meadows, roadsides, clay soils among vernal pools. | Shale or clay bluffs and hilltops, crevices of volcanic or limestone rock, pinyon-juniper belt. |
Elevation | 0–400 m. (0–1300 ft.) | 1600–2300 m. (5200–7500 ft.) |
Distribution |
CA; FL; MA; NC; SC; s Europe (Mediterranean); sw Asia; n Africa; Atlantic Islands (Azores) [Introduced in North America; introduced also in South America (Chile), s Africa, Pacific Islands (New Zealand), Australia]
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AZ; CO; NM; NV; UT; WY
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Discussion | Trifolium tomentosum is occasionally cultivated as a forage crop (F. J. Hermann 1953) and is becoming weedy in the flora area and in Australia (R. P. Randall 2002). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Trifolium andinum ranges from central and southern Nevada into west-central Utah, north-central Arizona to southeastern Utah, north-central New Mexico, and northeastern Utah into southwestern Wyoming. Differentiation of T. andinum into subspecific taxa proved impossible, since no consistent gaps in morphological traits could be found. (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. andinum var. canone, T. andinum var. navajoense, T. andinum var. podocephalum, T. andinum var. wahwahense | |
Name authority | Linnaeus: Sp. Pl. 2: 771. (1753) | Nuttall in J. Torrey and A. Gray: Fl. N. Amer. 1: 314. (1838) |
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