Trifolium ciliolatum |
Trifolium productum |
|
---|---|---|
foothill clover, tree clover |
elongated clover, productive clover, Shasta clover |
|
Habit | Herbs annual, 5–50 cm, glabrous or sparsely hairy. | Herbs perennial, 15–45 cm, glabrous. |
Stems | erect, branched. |
± erect, loosely cespitose, 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. |
basal and cauline, palmate; stipules ovate-lanceolate, 0.5–2 cm, margins usually entire, sometimes lobed, apex acute to acuminate; petiole 0.5–12 cm; petiolules 1 mm; leaflets 3, blades lanceolate or elliptic, 0.5–2 × 0.3–1.3 cm, base cuneate, veins prominent, margins serrate, apex acute, apiculate, 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. |
terminal or axillary, 15–30-flowered, ellipsoid or conic, 1.5–2 × 1–3 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally; involucres absent. |
Peduncles | 2.5–12 cm. |
2–13 cm, slightly twisted apically. |
Pedicels | erect becoming reflexed, 0.5–6 mm; bracteoles linear or cup-shaped, to 1 mm. |
strongly reflexed in fruit, 0.5 mm; bracteoles minute, lanceolate. |
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. |
12–14 mm; calyx pink to purple, campanulate, 3–3.5 mm, glabrous, veins 10 (5 sometimes faint), tube 1.5–1.7 mm, lobes subequal, triangular-subulate, orifice open; corolla pink to deep purple, 12–14 mm, banner oblong, 12–14 × 4–5 mm, apex rounded or retuse. |
Legumes | short-stipitate, ovoid, 5–10 mm. |
obliquely ellipsoid, 5 mm. |
Seeds | 1 or 2, brown, mottled, ovoid, 2.5–3 mm, smooth. |
1 or 2, brown, often purple-mottled, flattened ovoid, 2–3 mm, smooth. |
2n | = 16. |
= 16. |
Trifolium ciliolatum |
Trifolium productum |
|
Phenology | Flowering Apr–Jun. | Flowering May–Sep. |
Habitat | Oak-pine chaparral, meadows, roadsides. | Open coniferous woods, rocky places, stream banks, grassy meadows, near springs. |
Elevation | 0–1500 m. (0–4900 ft.) | 1100–2800 m. (3600–9200 ft.) |
Distribution |
CA; OR; WA; Mexico (Baja California)
|
CA; NV; OR
|
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 productum is morphologically most similar to T. kingii, from which it differs by its glabrous calyces and inflorescence rachises surpassing the flowers to 1.5 cm and apically forked (M. Zohary and D. Heller 1984). Trifolium productum is geographically isolated from T. kingii; the former is restricted to northern California, western Oregon, and western Nevada, while the latter is restricted to Utah and easternmost Nevada (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. ciliatum var. discolor | T. kingii subsp. productum, T. kingii var. productum |
Name authority | Bentham: Pl. Hartw., 304. (1849) | Greene: Erythea 2: 181. (1894) |
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