Trifolium willdenovii |
Trifolium appendiculatum |
|
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sand clover, thimble clover, tomcat clover, Willdenow's clover |
large white-tip clover |
|
Habit | Herbs annual, 10–60 cm, glabrous. | Herbs annual, 7–80+ cm, glabrous. |
Stems | erect, branched. |
ascending or erect, branched. |
Leaves | palmate; stipules lanceolate or ovate, 1–2 cm, margins dentate or lacerate, apex acuminate; petiole 1–8 cm; petiolules 0.5 mm; leaflets 3, blades linear, lanceolate, or elliptic, 1–5 × 0.2–1.5 cm, base cuneate, veins fine, margins serrate, apex acute, blunt, or retuse, surfaces glabrous. |
palmate; stipules lanceolate or ovate, 0.3–1.3 cm, margins lacerate, apex acute to acuminate; petiole 2–7.3 cm; petiolules to 0.9 mm; leaflets 3, blades obovate-obcordate, elliptic, or obovate, 0.3–2.6 × 0.2–1.1 cm, base cuneate, veins thickened, margins denticulate, apex acute or retuse, surfaces glabrous. |
Inflorescences | axillary or terminal, 10–50-flowered, globose or ovoid, 1–3.5 × 1–3 cm; involucres flattened or bowl-shaped, 3–9 mm, when folded, not hiding flowers except proximally, incised 1/4–1/3 their length. |
axillary, 4–25-flowered, subglobose or globose, 0.7–2 × 0.8–3 cm; involucres flat, 3.2–6.5 mm, incised 1/2 their length, lobes 4–7, lacerate. |
Peduncles | 2–15 cm. |
1.7–7.5 cm. |
Pedicels | erect, 0.5 mm; bracteoles absent. |
straight, to 0.5 mm; bracteoles absent. |
Flowers | 12–20 mm; calyx tubular-campanulate, slit between adaxial lobes, 6–9 mm, glabrous, veins 10–15, tube 3–7 mm, lobes unequal, triangular or subulate, usually 3-fid or shouldered below apex, orifice open; corolla usually white with purple spot, sometimes lavender or pink or all white, 10–18 mm, banner narrowly oblong, 12–20 × 3–4 mm, apex obtuse or retuse. |
7–25 mm; calyx campanulate, not slit between adaxial lobes, 3.5–7.4 mm, glabrous, veins 10–20, tube 1.5–3.3 mm, lobes subequal, narrowly triangular, margins usually entire, orifice open; corolla deep purple, usually white-tipped, 6.5–17 mm, banner obovate, 6.3–16 × 1.5–4 mm, apex emarginate. |
Legumes | ellipsoid, 3 mm. |
oblong or ellipsoid, 3.6–3.8 mm. |
Seeds | 1 or 2, yellow, mottled, globose-ellipsoid, 1.5–2.5 mm, smooth. |
2, blackish brown, mottled, ovoid or ellipsoid, 1.9–2.8 mm, smooth. |
2n | = 16. |
= 16. |
Trifolium willdenovii |
Trifolium appendiculatum |
|
Phenology | Flowering Mar–Jul. | Flowering Mar–Jun. |
Habitat | Roadsides, meadows, lawns, hillsides, stream margins, open oak chaparral. | Coastal areas, foothills, mountain meadows, ditches, wet areas. |
Elevation | 0–2500 m. (0–8200 ft.) | 0–1400 m. (0–4600 ft.) |
Distribution |
AZ; CA; ID; OR; WA; BC; Mexico (Baja California)
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CA; OR |
Discussion | Trifolium willdenovii was described by M. Zohary and D. Heller (1984) as one of the most variable clover species in North America. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Trifolium appendiculatum is found throughout California, although never east of the Sierra Nevada, and into southern Oregon. (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. involucratum, T. aciculare, T. nuttallii, T. scabrellum, T. segetum, T. tridentatum, T. tridentatum var. aciculare, T. tridentatum var. scabrellum, T. tridentatum var. segetum, T. tridentatum var. watsonii, T. trimorphum, T. watsonii | T. appendiculatum var. rostratum, T. calophyllum, T. morleyanum, T. phaeocephalum, T. rostratum, T. splendens, T. trilobatum, T. variegatum var. major, T. variegatum var. rostratum, T. variegatum var. trilobatum |
Name authority | Sprengel: Syst. Veg. 3: 208. (1826) | Lojacono: Nuovo Giorn. Bot. Ital. 15: 181. (1883) |
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