Lathyrus torreyi |
Lathyrus biflorus |
|
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redwood pea, Torrey's pea, Torrey's peavine |
two-flower pea, two-flower sweet pea |
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Habit | Herbs perennial, from rhizome, finely villous. | Herbs perennial, from rhizome, villous. |
Stems | angled, erect to sprawling, basally branched 0–3 times, 1–4 dm. |
angled, erect or sprawling, basally branched 1–3 times, 0.5–1 dm. |
Leaves | 2–7 cm; tendrils absent or mucronate; stipules lanceolate, 7–12 × 2–5 mm, much smaller than leaflets; leaflets 8–16, scattered, blades ovate to lanceolate, 5–15 × 3–10 mm, surfaces villous. |
0.5–1 cm; tendrils absent or reduced to flattened bristles; stipules linear, 4–5 × 1–2 mm, ca. 1/2 length of leaflets; leaflets (3 or)4(or 5), paired, blades lanceolate, 6–12 × 2–3 mm, surfaces finely villous. |
Inflorescences | 1- or 2-flowered, 0.5–3 cm. |
1- or 2-flowered, 1 cm. |
Flowers | 8–12 mm; calyx lobes unequal, lateral lobes linear-triangular, longer than tube; corolla blue-purple, banner erect, blade equal to claw, wings longer than keel; ovary densely pubescent. |
7–8 mm; calyx lobes subequal, lateral lobes deltate, shorter than tube; corolla cream, banner erect, blade equal to claw, wings equal to keel; ovary glabrous. |
Legumes | 15–20 × 4–5 mm. |
13–15 × 3–5 mm. |
2n | = 14. |
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Lathyrus torreyi |
Lathyrus biflorus |
|
Phenology | Flowering Apr–Jul. | Flowering Jun. |
Habitat | Open coniferous forests. | Serpentine outcrops and Jeffrey pine woodlands. |
Elevation | 50–1500 m. (200–4900 ft.) | 1300–1400 m. (4300–4600 ft.) |
Distribution |
CA; OR; WA
|
CA |
Discussion | Lathyrus torreyi is known from in and west of the Cascade Range; it is very rare in Washington. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lathyrus biflorus is known only from southeastern Humboldt County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Lathyrus | Fabaceae > subfam. Faboideae > Lathyrus |
Sibling taxa | ||
Name authority | A. Gray: Proc. Amer. Acad. Arts 7: 337. (1868) | T. W. Nelson & J. P. Nelson: Brittonia 35: 183, fig. 2. (1983) |
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