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

Brewer's sweet or snub or sulfur pea, Brewer's sweet pea, snub pea, sulfur pea, sulpher pea, sulphur pea

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

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

angled, climbing, basally branched 0–3 times, 5–15 dm.

Leaves

(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.

9–12 cm;

tendrils well developed;

stipules lanceolate, 15–25 × 4–10 mm, sometimes equal to distal leaflets;

leaflets 6–12, scattered, blades ovate to lanceolate, 25–50 × 10–20 mm, surfaces glabrous or pubescent.

Inflorescences

4–10(–13)-flowered, 3–12 cm.

9–15-flowered, 6–10 cm.

Flowers

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.

11–13 mm;

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

corolla orange to yellow-cream, banner erect, blade shorter than claw, wings equal to keel;

ovary glabrous.

Legumes

30–70 × 4–7 mm.

40–70 × 4–6 mm.

2n

= 14.

Lathyrus ochroleucus

Lathyrus sulphureus

Phenology Flowering Apr–Jul.
Habitat Moist woodlands, clearings, thickets, glades, meadows.
Elevation 0–1500 m. (0–4900 ft.)
Distribution
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]
from USDA
w United States
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

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

Key
1. Herbs glabrous.
var. sulphureus
1. Herbs densely villous.
var. argillaceus
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. 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. ochroleucus, L. odoratus, L. palustris, L. pauciflorus, L. polyphyllus, L. pratensis, L. pusillus, L. rigidus, L. sphaericus, L. splendens, L. sylvestris, L. tingitanus, L. torreyi, L. tracyi, L. tuberosus, L. venosus, L. vestitus
Subordinate taxa
L. sulphureus var. argillaceus, L. sulphureus var. sulphureus
Synonyms L. nevadensis subsp. stipulaceus
Name authority Hooker: Fl. Bor.-Amer. 1: 159. (1831) W. H. Brewer ex A. Gray: Proc. Amer. Acad. Arts 7: 399. (1868)
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