Trifolium bifidum |
Trifolium dedeckerae |
|
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notch-leaf clover, Pinole clover, piñole clover |
Dedecker's clover |
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Habit | Herbs annual, 5–55 cm, sparsely pubescent or glabrous. | Herbs perennial, 20–25 cm, glabrous. |
Stems | erect, branched. |
± erect, loosely cespitose, branched. |
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. |
basal and cauline, palmate; stipules ovate, 1.1–1.5 cm, margins entire, apex acuminate-subulate; petiole 5–15 cm; petiolules absent; leaflets 3, blades lanceolate to linear, 2–4 × 0.1–0.6 cm, base cuneate, veins prominent, margins remotely serrate, apex acute, surfaces glabrous. |
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 or axillary, 10–18-flowered, ellipsoid to subglobose, 1.8–2.2 × 2.3–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres absent. |
Peduncles | 3–8 cm. |
7–16 cm, slightly twisted apically. |
Pedicels | reflexed in fruit, 1–3 mm; bracteoles broadly triangular, membranous, to 0.5 mm. |
strongly reflexed in fruit, 0.5 mm; bracteoles minute. |
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. |
13–15 mm; calyx tubular-campanulate, 6–8.5 mm, glabrous, veins 10, tube 2–2.5 mm, lobes unequal, triangular-subulate, orifice open; corolla pink to purple, 15 mm, banner oblong, 14–16 × 6–7 mm, apex acute or apiculate. |
Legumes | stipitate, obovoid, 3–4 mm. |
ellipsoid, 5 mm. |
Seeds | 1 or 2, brown, mottled, oblong, 2–3 mm, smooth. |
1 or 2, brown, flattened ovoid, 2 mm, smooth. |
2n | = 16. |
|
Trifolium bifidum |
Trifolium dedeckerae |
|
Phenology | Flowering Apr–Jun. | Flowering May–Jun. |
Habitat | Open woodlands, fields, roadsides, slopes, stream margins, meadows. | Rock crevices, dry slopes. |
Elevation | 0–1200 m. (0–3900 ft.) | 2100–3400 m. (6900–11200 ft.) |
Distribution |
CA; OR; WA; BC; Mexico (Baja California)
|
CA |
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.) |
Trifolium dedeckerae is known from Inyo, Kern, Mono, and Tulare counties. It is similar to T. macilentum and T. productum, from which it differs by its much narrower leaflets (J. M. Gillett 1972). (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. bifidum var. decipiens, T. greenei, T. hallii | T. kingii subsp. dedeckerae, T. macilentum var. dedeckerae |
Name authority | A. Gray: Proc. Calif. Acad. Sci. 3: 102. (1864) | J. M. Gillett: Madroño 21: 451, fig. 1. (1972) |
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