Trifolium bifidum |
Trifolium parryi |
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notch-leaf clover, Pinole clover, piñole clover |
Parry's clover |
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Habit | Herbs annual, 5–55 cm, sparsely pubescent or glabrous. | Herbs perennial, 10–20 cm, glabrous. | ||||||||
Stems | erect, branched. |
erect or ascending, loosely cespitose, sometimes rhizomatous, sparsely branched. |
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Leaves | palmate; stipules ovate to lanceolate, 0.8–1.5 cm, margins entire or slightly serrate, apex acicular; petiole 1–7 cm; petiolules to 0.5 mm; leaflets 3, blades narrowly obcordate, obovate, oblanceolate, or linear, 1–2.5 × 0.3–0.7 cm, base cuneate, veins moderately thickened, margins serrate distally or entire, apex rounded, truncate, shallowly to deeply retuse, or deeply 2-fid, surfaces glabrous or hairy abaxially along midvein. |
palmate; stipules oblong, 0.5–2 cm, margins entire, apex acute to short-acuminate; petiole 2–10 cm; petiolules 0.5 mm; leaflets 3, blades elliptic to obovate, 1–4.1 × 0.5–1.6 cm, base cuneate, veins fine, margins entire, serrulate, or dentate, apex usually acute or obtuse, rarely retuse or apiculate, surfaces glabrous. |
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Inflorescences | axillary or terminal, 5–30-flowered, globose to subglobose, 0.8–1.5 × 0.8–1.5 cm, rachis prolonged beyond flowers; involucres a very narrow rim, to 0.5 mm. |
terminal, 15–20-flowered, globose, ovoid, or ellipsoid, 1.4–3.7 × 1.8–3 cm; involucres formed of distinct or connate bracteoles, apex acute or obtuse. |
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Peduncles | 3–8 cm. |
2.5–15 cm. |
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Pedicels | reflexed in fruit, 1–3 mm; bracteoles broadly triangular, membranous, to 0.5 mm. |
erect, reflexed slightly, or only those of proximal flowers reflexed, 1 mm; bracteoles purplish, oblong, 3–6 mm, scarious. |
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Flowers | 6–8 mm; calyx campanulate, 3–3.6 mm, slightly hairy or glabrous, veins 10, tube 1–1.5 mm, lobes unequal, subulate, margins green or purple, orifice open; corolla pink or purple, 5–7 mm, banner elliptic to oblong, 5–7 × 3–4 mm, apex rounded, apiculate. |
12–22 mm; calyx campanulate, slightly gibbous, 6–9 mm, glabrous, veins 10, tube 3–4 mm, lobes unequal, subulate to narrowly triangular, orifice open; corolla pale purplish violet, keel petals darker purple, 10–22 mm, banner broadly elliptic or obovate, 10–22 × 8–10 mm, apex rounded, acute, or retuse. |
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Legumes | stipitate, obovoid, 3–4 mm. |
stipitate, oblong, 6–7 mm. |
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Seeds | 1 or 2, brown, mottled, oblong, 2–3 mm, smooth. |
1–4, tan or brown, mitten-shaped, 1.5–2 mm, smooth, dull. |
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2n | = 16. |
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Trifolium bifidum |
Trifolium parryi |
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Phenology | Flowering Apr–Jun. | |||||||||
Habitat | Open woodlands, fields, roadsides, slopes, stream margins, meadows. | |||||||||
Elevation | 0–1200 m. (0–3900 ft.) | |||||||||
Distribution |
CA; OR; WA; BC; Mexico (Baja California)
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w United States
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Discussion | Trifolium bifidum ranges from Baja California, Mexico, northward through California to scattered sites in Oregon, Washington, and British Columbia. Recent re-evaluation of Trifolium bifidum and related species showed complete overlap in characters for the two varieties that have been recognized previously, with no clear distinctions between them (L. Rogers, pers. comm.). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 3 (3 in the flora). Subdivision of Trifolium parryi into three subspecies (J. M. Gillett 1965) or two varieties (D. Isely 1998) was rejected by R. C. Barneby (1989). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||||||
Parent taxa | Fabaceae > subfam. Faboideae > Trifolium | Fabaceae > subfam. Faboideae > Trifolium | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | T. bifidum var. decipiens, T. greenei, T. hallii | |||||||||
Name authority | A. Gray: Proc. Calif. Acad. Sci. 3: 102. (1864) | A. Gray: Amer. J. Sci. Arts, ser. 2, 33: 409. (1862) | ||||||||
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