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bush vetchling, seemly pea

grimes' pea, grimes' vetchling

Habit Herbs perennial, from rhizome, glabrous or puberulent. Herbs perennial, from rhizomelike rootstock, glabrous.
Stems

angled, erect, basally branched 0–2 times, 2–5 dm.

angled, erect, branched 0–2 times basally or from proximal nodes, 0.5–2 dm.

Leaves

2–4 cm;

tendrils simple or branched, sometimes prehensile;

stipules linear, 5–15 × 1–2 mm, much smaller than leaflets;

leaflets 6 or 8, scattered, blades ovate to lanceolate, 15–45 × 4–10 mm, surfaces glabrous throughout or puberulent abaxially.

1–2 cm;

tendrils reduced to bristles;

stipules lanceolate to linear, 5–15 × 1–5 mm, much smaller than leaflets;

leaflets 4 or 6, paired, blades ovate to obovate, 10–25 × 5–10 mm, surfaces glabrous.

Inflorescences

2–4-flowered, 7–12 cm.

2–4-flowered, 4–6 cm.

Flowers

18–20 mm;

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

corolla blue-purple, banner erect, blade longer than claw, wings equal to keel (held above keel);

ovary glabrous.

14–17 mm;

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

corolla bicolored lavender and white, banner erect, blade longer than claw, wings longer than keel, 1–3 mm;

ovary glabrous.

Legumes

40–50 × 8–10 mm, short-stipitate.

25–30 × 8–10 mm, stipitate.

2n

= 14.

Lathyrus eucosmus

Lathyrus grimesii

Phenology Flowering Apr–Jun. Flowering Jun–Jul.
Habitat Dry soils in washes, pinyon-juniper woodlands, oak-brush, ponderosa pine forests, open prairies, grasslands. Talus slopes in sagebrush com­munities.
Elevation 1200–2500 m. (3900–8200 ft.) 1800–2600 m. (5900–8500 ft.)
Distribution
from FNA
AZ; CO; NM; TX; UT; WY; Mexico (Coahuila)
[WildflowerSearch map]
[BONAP county map]
from FNA
NV
[BONAP county map]
Discussion

Lathyrus eucosmus is known from the northern two-thirds of Arizona northward to southeastern Utah, and eastward in southeastern Wyoming, Colorado, New Mexico, and Texas to the edge of the Great Plains.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Lathyrus grimesii is known only from the northern Independence Range and southern Bull Run Mountains in Elko 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
L. angulatus, L. aphaca, L. biflorus, L. brachycalyx, L. brownii, L. cicera, L. decaphyllus, L. delnorticus, 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
L. angulatus, L. aphaca, L. biflorus, L. brachycalyx, L. brownii, L. cicera, L. decaphyllus, L. delnorticus, L. eucosmus, L. glandulosus, L. graminifolius, 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
Synonyms L. brachycalyx subsp. eucosmus, L. brachycalyx var. eucosmus
Name authority Butters & H. St. John: Rhodora 19: 160. (1917) Barneby in A. Cronquist et al.: Intermount. Fl. 3(B): 208, plate [p. 211], fig. s.n. [center right]. (1989)
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