Trifolium productum |
Trifolium pinetorum |
|
---|---|---|
elongated clover, productive clover, Shasta clover |
pine clover, pinewoods clover, woods clover |
|
Habit | Herbs perennial, 15–45 cm, glabrous. | Herbs perennial, 5–30 cm, glabrous or sparsely pilose; rhizomes absent, roots stout, branched. |
Stems | ± erect, loosely cespitose, branched. |
prostrate to 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 lanceolate-ovate, 0.7–1.3 cm, margins entire, apex acuminate; petiole 1–8.5 cm; petiolules 1–1.5 mm; leaflets 3, blades oblanceolate or obovate, 0.5–2.9 × 0.4–1.3 cm, base cuneate, veins prominent, margins denticulate to spinulose, apex usually rounded or truncate, sometimes retuse, 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 or terminal, 10–20-flowered, obconic, globose, or subglobose, 1.7–2.5 × 1.–1.5 cm; involucres broadly campanulate, 6–8 mm, incised ± 3/4 their length, lobes 15–20, linear-lanceolate, entire, acuminate. |
Peduncles | 2–13 cm, slightly twisted apically. |
4–6 cm. |
Pedicels | strongly reflexed in fruit, 0.5 mm; bracteoles minute, lanceolate. |
erect to slightly reflexed, 1–2 mm; bracteoles ovate, 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. |
10–16 mm; calyx campanulate, 6–10 mm, glabrous, veins 10, tube 2–2.3 mm, lobes ± equal, subulate, 3–5 mm, orifice open; corolla white to pale purple, keel petals with dark purple-red tips, 11–13 mm, banner oblong, 11–13 × 4–5 mm, apex retuse. |
Legumes | obliquely ellipsoid, 5 mm. |
short-stipitate, oblong, 3.5–5 mm. |
Seeds | 1 or 2, brown, often purple-mottled, flattened ovoid, 2–3 mm, smooth. |
1 or 2, olive-brown, mottled purple, oblong, 1.5 mm, smooth, semiglossy. |
2n | = 16. |
= 16. |
Trifolium productum |
Trifolium pinetorum |
|
Phenology | Flowering May–Sep. | Flowering Jun–Oct. |
Habitat | Open coniferous woods, rocky places, stream banks, grassy meadows, near springs. | Disturbed areas in pine, fir, or spruce forests. |
Elevation | 1100–2800 m. (3600–9200 ft.) | 2300–2800 m. (7500–9200 ft.) |
Distribution |
CA; NV; OR
|
AZ; NM; Mexico (Chihuahua)
|
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 pinetorum is found in Cochise, Coconino, Pima, and Santa Cruz counties in Arizona, and Catron, Grant, Lincoln, and Otero counties in New Mexico, as well as the Sierra Madre in Chihuahua, Mexico. It occupies disturbed areas in pine-fir-spruce forests, and has adapted well to anthropogenic disturbances, such as roadsides and other graded areas (J. M. Gillett 1980). (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. longicaule, T. willdenovii var. longicaule, T. wormskioldii var. longicaule |
Name authority | Greene: Erythea 2: 181. (1894) | Greene: Erythea 2: 182. (1894) |
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