Trifolium productum |
Trifolium glomeratum |
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elongated clover, productive clover, Shasta clover |
cluster clover |
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Habit | Herbs perennial, 15–45 cm, glabrous. | Herbs annual, 10–30 cm, glabrous. |
Stems | ± erect, loosely cespitose, branched. |
procumbent, decumbent, or ascending, 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, 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 | 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, 30+-flowered, globose, 0.8–1 × 0.8–1 cm; involucres absent. |
Peduncles | 2–13 cm, slightly twisted apically. |
absent or to 0.1 cm. |
Pedicels | strongly reflexed in fruit, 0.5 mm; bracteoles minute, lanceolate. |
straight, to 0.2 mm; bracteoles linear, to 0.5 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. |
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 | obliquely ellipsoid, 5 mm. |
obovoid, 2–3 mm. |
Seeds | 1 or 2, brown, often purple-mottled, flattened ovoid, 2–3 mm, smooth. |
2, brown, reniform, 1 mm, tuberculate. |
2n | = 16. |
= 14, 16. |
Trifolium productum |
Trifolium glomeratum |
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Phenology | Flowering May–Sep. | Flowering May–Jun. |
Habitat | Open coniferous woods, rocky places, stream banks, grassy meadows, near springs. | Roadsides, lawns, thin grasslands. |
Elevation | 1100–2800 m. (3600–9200 ft.) | 0–500 m. (0–1600 ft.) |
Distribution |
CA; NV; OR
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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 | 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 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. kingii subsp. productum, T. kingii var. productum | |
Name authority | Greene: Erythea 2: 181. (1894) | Linnaeus: Sp. Pl. 2: 770. (1753) |
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