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

singletary vetchling, tiny pea

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

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

narrowly winged, sprawling or climbing, basally branched 0–4 times, 3–6 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.

1–3 cm;

tendrils well developed;

stipules linear, 10–20 × 2–5 mm, equal to smaller leaflets;

leaflets 2, blades linear, 15–60 × 2–8 mm, surfaces glabrous.

Inflorescences

4–10(–13)-flowered, 3–12 cm.

terminal, 1- or 2-flowered, 2–4 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.

7–10 mm;

calyx lobes subequal, linear-triangular, usually longer than tube;

corolla blue, banner erect, blade equal to claw, wings equal to keel;

ovary glabrous.

Legumes

30–70 × 4–7 mm.

30–50 × 2–4 mm.

2n

= 14.

= 14.

Lathyrus ochroleucus

Lathyrus pusillus

Phenology Flowering Apr–Jul. Flowering Mar–May.
Habitat Moist woodlands, clearings, thickets, glades, meadows. Roadsides, pastures, prairies, open habitats.
Elevation 0–1500 m. (0–4900 ft.) 0–800 m. (0–2600 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 FNA
AL; AR; FL; KS; LA; MO; MS; NC; OK; TX; VA; South America (Argentina, Brazil, Chile, Ecuador, Paraguay, Peru, Uruguay)
[BONAP county map]
Discussion

Lathyrus pusillus, the only North American member of section Notolathyrus, a section centered in South America, is also the only annual species of Lathyrus native to North America. It is native to the southeastern United States; it has been cultivated as a forage crop in Oregon and occasionally escapes, but it has not become naturalized there.

(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. 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. rigidus, L. sphaericus, L. splendens, L. sulphureus, L. sylvestris, L. tingitanus, L. torreyi, L. tracyi, L. tuberosus, L. venosus, L. vestitus
Synonyms L. nevadensis subsp. stipulaceus
Name authority Hooker: Fl. Bor.-Amer. 1: 159. (1831) Elliott: Sketch Bot. S. Carolina 2: 223. (1823)
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