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redwood pea, Torrey's pea, Torrey's peavine

Del Norte pea

Habit Herbs perennial, from rhizome, finely villous. Herbs perennial, from rhizome, glabrous.
Stems

angled, erect to sprawling, basally branched 0–3 times, 1–4 dm.

narrowly winged, erect to climbing, basally branched 0–several times, 2–8 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.

9–13 cm;

tendrils well developed;

stipules lanceolate, 10–30 × 3–15 mm, sometimes equal to distal leaflets;

leaflets 9–12, scattered, blades lanceolate, 30–50 × 5–15 mm, surfaces glabrous.

Inflorescences

1- or 2-flowered, 0.5–3 cm.

8–12-flowered, 7–10 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.

9–12 mm;

calyx lobes unequal, lateral lobes deltate, shorter than tube;

corolla cream-white, banner erect, blade longer than claw, wings equal to keel;

ovary glabrous.

Legumes

15–20 × 4–5 mm.

30–40 × 3–5 mm.

2n

= 14.

= 14.

Lathyrus torreyi

Lathyrus delnorticus

Phenology Flowering Apr–Jul. Flowering May–Jun.
Habitat Open coniferous forests. Serpentine areas along rivers and creeks in coniferous and mixed evergreen forests.
Elevation 50–1500 m. (200–4900 ft.) 0–1000 m. (0–3300 ft.)
Distribution
from FNA
CA; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
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 delnorticus is restricted to Del Norte and western Siskiyou counties in California, and Curry and Josephine counties in Oregon.

(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
L. angulatus, L. aphaca, L. biflorus, L. brachycalyx, L. brownii, L. cicera, L. decaphyllus, L. delnorticus, L. eucosmus, L. glandulosus, L. graminifolius, L. grimesii, L. hirsutus, L. hitchcockianus, L. holochlorus, L. japonicus, L. jepsonii, L. laetivirens, L. lanszwertii, L. latifolius, L. littoralis, L. nevadensis, L. nissolia, L. ochroleucus, L. odoratus, L. palustris, L. pauciflorus, L. polyphyllus, L. pratensis, L. pusillus, L. rigidus, L. sphaericus, L. splendens, L. sulphureus, L. sylvestris, L. tingitanus, L. tracyi, L. tuberosus, L. venosus, L. vestitus
L. angulatus, L. aphaca, L. biflorus, L. brachycalyx, L. brownii, L. cicera, L. decaphyllus, L. eucosmus, L. glandulosus, L. graminifolius, L. grimesii, L. hirsutus, L. hitchcockianus, L. holochlorus, L. japonicus, L. jepsonii, L. laetivirens, L. lanszwertii, L. latifolius, L. littoralis, L. nevadensis, L. nissolia, L. ochroleucus, L. odoratus, L. palustris, L. pauciflorus, L. polyphyllus, L. pratensis, L. pusillus, L. rigidus, L. sphaericus, L. splendens, L. sulphureus, L. sylvestris, L. tingitanus, L. torreyi, L. tracyi, L. tuberosus, L. venosus, L. vestitus
Name authority A. Gray: Proc. Amer. Acad. Arts 7: 337. (1868) C. L. Hitchcock: Revis. N. Amer. Lathyrus, 30, fig. 21. (1952)
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