Trifolium productum |
Trifolium leibergii |
|
---|---|---|
elongated clover, productive clover, Shasta clover |
Leiberg's clover |
|
Habit | Herbs perennial, 15–45 cm, glabrous. | Herbs perennial, 10–15 cm, canescent. |
Stems | ± erect, loosely cespitose, branched. |
erect, aerial stems sparsely 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 lanceolate, 0.7–1.5 cm, margins coarsely spinulose-dentate, apex acuminate; petiole 1–3 cm; petiolules to 0.5 mm; leaflets 3, blades obovate, rhombic, or elliptic, sometimes folded, 0.9–1.5 × 0.5–1.3 cm, base cuneate, veins very thick, margins coarsely spinulose-dentate, apex rounded, long-apiculate, surfaces canescent. |
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, 5–25-flowered, globose, 2.2–2.5 × 2.3–2.7 cm; involucres a narrow, papery, irregular rim, to 0.5 mm. |
Peduncles | 2–13 cm, slightly twisted apically. |
2–4.5 cm. |
Pedicels | strongly reflexed in fruit, 0.5 mm; bracteoles minute, lanceolate. |
reflexed in fruit, 1.5–4 mm; bracteoles triangular, to 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. |
11–15 mm; calyx campanulate, 5–11 mm, pilose, veins 10, tube 1.8–2.2 mm, lobes subequal, lanceolate-setiform, orifice open; corolla creamy white with purplish veins, becoming pinkish purple-tinged, 10.5–13 mm, banner broadly rhombic-ovate or obovate, 10.5–13 × 5–7 mm, apex rounded, slightly emarginate. |
Legumes | obliquely ellipsoid, 5 mm. |
ovoid, 3–4 mm. |
Seeds | 1 or 2, brown, often purple-mottled, flattened ovoid, 2–3 mm, smooth. |
1 or 2, brown, mitten-shaped, 1.5–2 mm, smooth. |
2n | = 16. |
|
Trifolium productum |
Trifolium leibergii |
|
Phenology | Flowering May–Sep. | Flowering Jun–Jul. |
Habitat | Open coniferous woods, rocky places, stream banks, grassy meadows, near springs. | Open, rocky slopes and crests, ash-flows. |
Elevation | 1100–2800 m. (3600–9200 ft.) | 1900–2400 m. (6200–7900 ft.) |
Distribution |
CA; NV; OR
|
NV; OR |
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 leibergii is known from only a few populations from Harney County, Oregon, and Elko County, Nevada. It is in the Center for Plant Conservation’s National Collection of Endangered Plants. (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) | A. Nelson & J. F. Macbride: Bot. Gaz. 65: 58. (1918) |
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