Trifolium ciliolatum |
Trifolium resupinatum |
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foothill clover, tree clover |
Persian clover, reversed clover |
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Habit | Herbs annual, 5–50 cm, glabrous or sparsely hairy. | Herbs annual, 20–60 cm, glabrous or glabrescent. |
Stems | erect, branched. |
ascending, erect, or procumbent, branched. |
Leaves | palmate; stipules ovate-lanceolate, 1–1.5 cm, margins entire, sometimes ciliate, apex acuminate; petiole 1–13 cm; petiolules 0.5 mm; leaflets 3, blades elliptic to oblong or obovate, 0.8–3.5 × 0.5–1.5 cm, base cuneate, veins thickened, margins serrate proximally, obscurely denticulate distally, apex usually rounded or retuse, rarely acute, surfaces glabrous. |
palmate; stipules lanceolate or ovate, 0.5–1.8 cm, margins entire, apex acuminate-filiform; petiole 0.5–20 cm; petiolules to 1 mm; leaflets 3, blades obovate, ovate, elliptic, or rhombic, 1–3 × 0.5–3 cm, base cuneate, veins moderately prominent, margins spinulose-dentate, apex rounded or broadly acute, surfaces hairy abaxially, glabrous adaxially. |
Inflorescences | axillary or terminal, 10–30-flowered, ovoid to subglobose, 0.7–2.2 × 0.5–2 cm; involucres a narrow rim, 0.5 mm, membranous, dentate. |
axillary, 15–30-flowered, subglobose to globose, flowers resupinate, forming stellate-spreading clusters in fruit, 0.5–1.6 × 0.8–1.5 cm; involucres a narrow rim, 0.2 mm. |
Peduncles | 2.5–12 cm. |
1–6 cm. |
Pedicels | erect becoming reflexed, 0.5–6 mm; bracteoles linear or cup-shaped, to 1 mm. |
slightly reflexed, to 0.5 mm; bracteoles minute or absent. |
Flowers | 6–13 mm; calyx broadly campanulate, 5–11 mm, glabrous, veins 10, tube 1–5 mm, lobes unequal, elliptic to linear, margins hyaline, dentate or pectinate, ciliate, sinuses narrow, orifice open; corolla white, pink, or purple, 5–13 mm, banner broadly ovate, 6–13 × 4–7 mm, apex rounded, apiculate. |
5–6 mm; calyx tubular-campanulate, inflated in fruit, markedly asymmetric-bilabiate, slit between adaxial lobes, 2.5–3 mm, 8–11 mm in fruit, hairy, short-hairy or glabrescent in fruit, veins 10, connected by lateral veins, tube 2 mm, 7–9 mm in fruit, lobes green, erect, unequal, triangular, divergent, linear-lanceolate, unequal in fruit, orifice open; corolla pink to purple, 5–8 mm, banner oblong, 5–8 × 2 mm, apex emarginate to crenulate. |
Legumes | short-stipitate, ovoid, 5–10 mm. |
lenticular, 1.8–2.2 mm. |
Seeds | 1 or 2, brown, mottled, ovoid, 2.5–3 mm, smooth. |
1, ovoid, dark purple, olive green, yellow, or reddish brown, 1.5–1.9 mm, smooth, dull. |
2n | = 16. |
= 14, 16, 32. |
Trifolium ciliolatum |
Trifolium resupinatum |
|
Phenology | Flowering Apr–Jun. | Flowering Mar–May. |
Habitat | Oak-pine chaparral, meadows, roadsides. | Wet meadows, lawns, roadsides, fields, waste places. |
Elevation | 0–1500 m. (0–4900 ft.) | 0–700 m. (0–2300 ft.) |
Distribution |
CA; OR; WA; Mexico (Baja California)
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AL; AR; CA; DC; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; MO; MS; NC; ND; OH; OK; OR; PA; SC; SD; TN; TX; VA; VT; WA; WI; WV; ON; c Europe; s Europe; sw Asia; n Africa; introduced also in s South America (Argentina, Uruguay); s Africa; Pacific Islands (Hawaii, New Zealand); Australia [Introduced in North America]
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Discussion | Trifolium ciliolatum is relatively widespread in California and is found in scattered sites in Baja California, Oregon, and Washington. Trifolium ciliatum Nuttall (1848), which pertains here, is a later homonym of T. ciliatum E. D. Clarke (1813). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Widespread use of Trifolium resupinatum as a forage crop began in the late 1920s, after it began to flourish in Louisiana following a flood of the Mississippi River (E. A. Hollowell 1943). It is used in the southern United States as a pasture plant and for production of hay, and has spread widely from cultivation. Reports of Trifolium resupinatum for New Brunswick and Quebec are based on old collections; since the species has not been recollected for many years in either province, they are excluded here. (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. ciliatum var. discolor | |
Name authority | Bentham: Pl. Hartw., 304. (1849) | Linnaeus: Sp. Pl. 2: 771. (1753) |
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