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aspen pea, aspen peavine, aspen vetchling, plateau peavine, plateau vetchling

cream pea, cream vetchling, cream-flower peavine, cream-flower sweet pea, creamy peavine, pale vetchling

Habit Herbs perennial, from rhizome, glabrous. Herbs perennial, from rhizome, glabrous except calyx ciliate.
Stems

angled, sprawling to erect, basally branched 0–3 times, 2–8 dm.

angled, sprawling or climbing, basally branched 0–3 times, 3–8 dm.

Leaves

3–8 cm;

tendrils well developed, often branched;

stipules lanceolate, 8–12 × 2–5 mm, much smaller than leaflets;

leaflets 6–10, usually paired, blades ovate, 20–40 × 10–20 mm, surfaces glabrous.

(2–)3–10 cm;

tendrils well developed;

stipules somewhat foliose, ovate-lanceolate, 15–35 × 5–20 mm, sometimes equal to distal leaflets;

leaflets (5 or)6(–8), usually paired, blades broadly ovate to lanceolate, (20–)25–65 × 10–35(–42) mm, surfaces glabrous.

Inflorescences

2–5-flowered, 4–7 cm.

4–10(–13)-flowered, 3–12 cm.

Flowers

15–20 mm;

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

corolla white to slightly pink or lavender, banner erect, blade longer than claw, wings equal to keel;

ovary glabrous.

10–15 mm;

calyx lobes unequal, lateral lobes lanceolate, usually longer than tube;

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

ovary glabrous.

Legumes

30–50 × 5–15 mm.

30–70 × 4–7 mm.

2n

= 14.

Lathyrus laetivirens

Lathyrus ochroleucus

Phenology Flowering Apr–Jul. Flowering Apr–Jul.
Habitat Flats, hillsides, sagebrush com­munities, pinyon-juniper, oak, pine, aspen and Douglas-fir forests. Moist woodlands, clearings, thickets, glades, meadows.
Elevation 1200–3200 m. (3900–10500 ft.) 0–1500 m. (0–4900 ft.)
Distribution
from FNA
AZ; CO; NM; NV; UT
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; IA; ID; IL; IN; MI; MN; MT; ND; NE; NJ; NY; OH; PA; SD; VT; WA; WI; WV; WY; AB; BC; MB; NT; NU; ON; QC; SK; YT
[WildflowerSearch map]
[BONAP county map]
Discussion

C. L. Hitchcock (1952), S. L. Welsh et al. (1987), and D. Isely (1998) placed Lathyrus laetivirens within the L. lanszwertii complex, whereas R. C. Barneby (1989) treated it as a separate species.

(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. 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. grimesii, L. hirsutus, L. hitchcockianus, L. holochlorus, L. japonicus, L. jepsonii, L. laetivirens, L. lanszwertii, L. latifolius, L. littoralis, L. nevadensis, L. nissolia, 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. lanszwertii var. laetivirens, L. leucanthus var. laetivirens L. nevadensis subsp. stipulaceus
Name authority Greene ex Rydberg: Fl. Colorado, 217. (1906) Hooker: Fl. Bor.-Amer. 1: 159. (1831)
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