Trifolium productum |
Trifolium latifolium |
|
---|---|---|
elongated clover, productive clover, Shasta clover |
broad-leaf clover, twin clover |
|
Habit | Herbs perennial, 15–45 cm, glabrous. | Herbs perennial, 4–40 cm, appressed-pubescent. |
Stems | ± erect, loosely cespitose, branched. |
ascending, branched from slender, rhizomatous crown. |
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 lanceolate, 0.5–2 cm, margins entire proximally, 1–3-toothed distally, apex acuminate or acute; petiole 1.5–10 cm; petiolules to 1 mm; leaflets 3, blades obovate or elliptic, 0.5–4.2 × 0.3–2.5 cm, base cuneate, veins fine or slightly thickened, margins serrulate, apex acute, rounded, or retuse, apiculate, surfaces appressed-pubescent. |
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. |
terminal, 6–30-flowered, globose, 2.3–3.1 × 2–3 cm, rachis prolonged beyond flowers; involucres absent. |
Peduncles | 2–13 cm, slightly twisted apically. |
bent proximal to flowers, inflorescence appearing inverted, 2.5–12 cm. |
Pedicels | strongly reflexed in fruit, 0.5 mm; bracteoles minute, lanceolate. |
reflexed in fruit, 1.5–2 mm; bracteoles minute, scalelike, membranous, to 0.3 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. |
13–17 mm, sweetly fragrant; calyx campanulate, 4.5–5 mm, appressed-pubescent, veins 5, tube 2 mm, lobes subequal, linear, orifice open; corolla white, sometimes with purplish or buff-pink veins, 12–15 mm, banner elliptic, 12–15 × 4 mm, longer than wing and keel petals, apex tapered, sometimes retuse. |
Legumes | obliquely ellipsoid, 5 mm. |
oblong to subglobose, 5 mm. |
Seeds | 1 or 2, brown, often purple-mottled, flattened ovoid, 2–3 mm, smooth. |
1 or 2, dark brown, ± globose, 1.2 mm, smooth. |
2n | = 16. |
= 16, 32. |
Trifolium productum |
Trifolium latifolium |
|
Phenology | Flowering May–Sep. | Flowering May–Jul. |
Habitat | Open coniferous woods, rocky places, stream banks, grassy meadows, near springs. | Clearings in conifer forests, moist gravelly, rocky, or clay soils, grassy hillsides and gullies, prairies. |
Elevation | 1100–2800 m. (3600–9200 ft.) | 800–1500 m. (2600–4900 ft.) |
Distribution |
CA; NV; OR
|
ID; MT; OR; WA
|
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 latifolium, which is found in northwestern Montana, northern Idaho, northeastern Oregon, and southeastern Washington, is morphologically allied to T. longipes (J. M. Gillett 1969) and molecular phylogenetic studies place it as sister to T. longipes (N. W. Ellison et al. 2006). (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 | T. longipes var. latifolium, T. aitonii, T. orbiculatum |
Name authority | Greene: Erythea 2: 181. (1894) | (Hooker) Greene: Pittonia 3: 223. (1897) |
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