Trifolium ciliolatum |
Trifolium productum |
|
---|---|---|
foothill clover |
shasta clover |
|
Habit | Plants annual, erect, 5–50 cm, glabrous or sparsely hairy; branched. | Plants perennial, leaves basal and cauline, ± erect, loosely cespitose, 15–45 cm, glabrous; branched. |
Leaves | palmate; leaflets 3, elliptic to oblong or obovate, 8–35 × 5–15 mm, bases cuneate; margins serrate proximally, obscurely denticulate distally; veins thickened; tips usually rounded or retuse, rarely acute; surfaces glabrous; petioles 10–130 mm; petiolules ~0.5 mm; stipules ovate-lanceolate, 10–15 mm; margins entire, sometimes ciliate; tips acuminate. |
palmate; leaflets 3, lanceolate or elliptic, 5–20 × 3–13 mm, bases cuneate; margins serrate; veins prominent; tips acute, apiculate; surfaces glabrous; petioles 5–120 mm; petiolules ~1 mm; stipules ovate-lanceolate, 5–20 mm; margins entire, sometimes lobed; tips acute to acuminate. |
Inflorescences | axillary or terminal, 10–30-flowered; ovoid becoming subglobose, 7–22 × 5–20 mm; involucres a narrow, membranous, dentate rim; ~0.5 mm; bracteoles linear or cup-shaped; ? 1 mm. |
terminal or axillary, 15–30-flowered; ellipsoidal or conical, 15–20 × 10–30 mm; rachises prolonged beyond flowers, undivided or forked, often bearing cluster of sterile flower buds distally; involucres absent; bracteoles minute, lanceolate. |
Peduncles | 25–120 mm. |
20–130 mm, slightly twisted distally. |
Pedicels | erect but becoming reflexed, 0.5–6 mm. |
strongly reflexed; ~0.5 mm. |
Flowers | 6–13 mm; calyces broadly campanulate, 5–11 mm, glabrous; veins 10; tubes 1–5 mm; lobes elliptic to linear, unequal; margins hyaline, markedly ciliate, dentate or pectinate; sinuses narrow; orifices open; corollas 5–13 mm, white, pink, or purple; banners broadly ovate, 6–13 × 4–7 mm; tips rounded, apiculate. |
12–14 mm; calyces campanulate, 3–3.5 mm, pink to purple, glabrous; veins 10 (5 sometimes faint); tubes 1.5–1.7 mm; lobes triangular-subulate, subequal; orifices open; corollas 12–14 mm, pink to deep purple; banners oblong, 12–14 × 4–5 mm; tips rounded or retuse. |
Fruits | longitudinally dehiscent; ovoid, 5–10 mm; < 2 × as long as calyces; short-stipitate. |
longitudinally dehiscent, obliquely ellipsoid; ~5 mm; ? calyces. |
Seeds | 1–2; ovoid, 2.5–3 mm, brown, mottled; smooth. |
1–2, flattened-ovoid, 2–3 mm, brown, often purple-mottled; smooth. |
2n | =16. |
=16. |
Trifolium ciliolatum |
Trifolium productum |
|
Distribution | ||
Discussion | Oak-pine chaparral, meadows, roadsides. Flowering May–Jun. 50–800 m. Col, ECas, Sisk, WV. CA, WA; south to Mexico. Native. |
Open coniferous woods, streambanks, grassy meadows, rocky areas. Flowering May–Aug. 1200–2400 m. BR, Casc, ECas. CA, NV. Native. Trifolium productum is most morphologically similar to T. kingii but differs from the latter by its glabrous calyx and a rachis that is elongated beyond the flowers ? 15 mm and is apically forked (Zohary & 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 eastern Nevada (Gillett 1972). |
Source | Flora of Oregon, volume 2, page 725 Michael Vincent |
Flora of Oregon, volume 2, page 736 Michael Vincent |
Sibling taxa | ||
Synonyms | Trifolium kingii, Trifolium kingii var. productum | |
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