Trifolium productum |
Trifolium tomentosum |
|
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elongated clover, productive clover, Shasta clover |
woolly clover |
|
Habit | Herbs perennial, 15–45 cm, glabrous. | Herbs annual, 10–20 cm, glabrous or sparsely hairy. |
Stems | ± erect, loosely cespitose, branched. |
prostrate, ascending, or erect, branched. |
Leaves | basal and cauline, palmate; stipules ovate-lanceolate, 0.5–2 cm, margins usually entire, sometimes lobed, apex acute to acuminate; petiole 0.5–12 cm; petiolules 1 mm; leaflets 3, blades lanceolate or elliptic, 0.5–2 × 0.3–1.3 cm, base cuneate, veins prominent, margins serrate, apex acute, apiculate, surfaces glabrous. |
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. |
Inflorescences | terminal or axillary, 15–30-flowered, ellipsoid or conic, 1.5–2 × 1–3 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres absent. |
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. |
Peduncles | 2–13 cm, slightly twisted apically. |
0.5–1.5 cm. |
Pedicels | strongly reflexed in fruit, 0.5 mm; bracteoles minute, lanceolate. |
slightly reflexed, to 0.5 mm; bracteoles cup-shaped, membranous, 0.2 mm. |
Flowers | 12–14 mm; calyx pink to purple, campanulate, 3–3.5 mm, glabrous, veins 10 (5 sometimes faint), tube 1.5–1.7 mm, lobes subequal, triangular-subulate, orifice open; corolla pink to deep purple, 12–14 mm, banner oblong, 12–14 × 4–5 mm, apex rounded or retuse. |
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. |
Legumes | obliquely ellipsoid, 5 mm. |
ovoid to globose, 2–3 mm. |
Seeds | 1 or 2, brown, often purple-mottled, flattened ovoid, 2–3 mm, smooth. |
1 or 2, yellow to brown, mottled, mitten-shaped, 0.9–1.1 mm, smooth, glossy. |
2n | = 16. |
= 16. |
Trifolium productum |
Trifolium tomentosum |
|
Phenology | Flowering May–Sep. | Flowering Feb–Apr. |
Habitat | Open coniferous woods, rocky places, stream banks, grassy meadows, near springs. | Sandy lawns, fields, meadows, roadsides, clay soils among vernal pools. |
Elevation | 1100–2800 m. (3600–9200 ft.) | 0–400 m. (0–1300 ft.) |
Distribution |
CA; NV; OR
|
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]
|
Discussion | Trifolium productum is morphologically most similar to T. kingii, from which it differs by its glabrous calyces and inflorescence rachises surpassing the flowers to 1.5 cm and apically forked (M. Zohary and D. Heller 1984). Trifolium productum is geographically isolated from T. kingii; the former is restricted to northern California, western Oregon, and western Nevada, while the latter is restricted to Utah and easternmost Nevada (J. M. Gillett 1972). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Trifolium | Fabaceae > subfam. Faboideae > Trifolium |
Sibling taxa | ||
Synonyms | T. kingii subsp. productum, T. kingii var. productum | |
Name authority | Greene: Erythea 2: 181. (1894) | Linnaeus: Sp. Pl. 2: 771. (1753) |
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