Trifolium ciliolatum |
Trifolium hydrophilum |
|
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foothill clover, tree clover |
saline clover, water sack clover |
|
Habit | Herbs annual, 5–50 cm, glabrous or sparsely hairy. | Herbs annual, 15–55 cm, glabrous. |
Stems | erect, branched. |
erect, 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 ovate-oblong to lanceolate, 0.4–1.3 cm, sheathing proximally, margins entire or serrate, apex acuminate; petiole 3–9 cm; petiolules 0.5 mm; leaflets 3, blades obovate to oblanceolate, 1.2–3 × 0.3–1.4 cm, base cuneate, veins fine, margins serrate, apex rounded or truncate, surfaces glabrous. |
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 or terminal, 5–15-flowered, ellipsoid, 1–1.8 × 1.3–1.5 cm; involucres flattened, 3–4 mm, shallowly incised, lobes 5–8, elliptic, apex rounded to truncate and irregularly erose, not split. |
Peduncles | 2.5–12 cm. |
3.5–6 cm. |
Pedicels | erect becoming reflexed, 0.5–6 mm; bracteoles linear or cup-shaped, to 1 mm. |
erect, 1 mm; bracteoles broadly ovate, to 0.5 mm. |
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. |
7–11 mm; calyx campanulate-tubular, 2.5–5 mm, glabrous, veins 5, tube 1–2.5 mm, lobes unequal, lanceolate-subulate, orifice open; corolla reddish purple, 7–9 mm, inflated in fruit, banner oblong, 7–9 × 3–4 mm, apex rounded, retuse. |
Legumes | short-stipitate, ovoid, 5–10 mm. |
stipitate, ovate-oblong, 4 mm. |
Seeds | 1 or 2, brown, mottled, ovoid, 2.5–3 mm, smooth. |
1 or 2, red-brown, ovoid-ellipsoid, 2 mm, smooth or papillate. |
2n | = 16. |
|
Trifolium ciliolatum |
Trifolium hydrophilum |
|
Phenology | Flowering Apr–Jun. | Flowering Apr–May. |
Habitat | Oak-pine chaparral, meadows, roadsides. | Wet, alkaline soils, salt marshes. |
Elevation | 0–1500 m. (0–4900 ft.) | 0–300 m. (0–1000 ft.) |
Distribution |
CA; OR; WA; Mexico (Baja California)
|
CA |
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.) |
Trifolium hydrophilum is closely allied to T. depauperatum and is restricted to the Sacramento Valley, northwestern San Joaquin Valley, and central-western California; it grows in moist areas, sometimes in standing water (M. A. Vincent and D. Isely 2012). (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 | T. amplectens var. hydrophilum, T. depauperatum var. hydrophilum |
Name authority | Bentham: Pl. Hartw., 304. (1849) | Greene: Man. Bot. San Francisco, 100. (1894) |
Web links |