Flora of North America species comparison

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Lathyrus lanszwertii var. leucanthus

Lathyrus lanszwertii var. lanszwertii
Photo is of parent taxon

Nevada pea
Photo is of parent taxon

lanszwert's pea, Nevada pea, thick-leaf peavine
Stems

erect, 1–3 dm.

sprawling or climbing, 4–8 dm.
Leaves

2–3 cm, terminating in simple bristle, less than 1 cm;

leaflets 4–6, blades lanceolate and 25–50 × 5–15 mm, or linear and 35–70 × 2–5 mm.

5–8 cm, terminating in well-developed, usually branched tendril;

leaflets 8–10, blades usually lanceolate, rarely linear, 30–70 × 5–20 mm.
Inflorescences

3–5 cm.

3–9 cm.
Flowers

10–15 mm, corolla white.

10–15 mm, corolla blue-purple, banner retuse to shallowly cordate.
2n

= 28.

= 14, 28.

Lathyrus lanszwertii var. leucanthus

Lathyrus lanszwertii var. lanszwertii
Phenology Flowering Apr–Jun. Flowering Mar–Jun.
Habitat In sagebrush, openings in pine, oak, and aspen woodlands. Parkland, thickets, sagebrush, juniper, pine, and aspen woodlands.
Elevation 2000–3200 m. (6600–10500 ft.) 900–3100 m. (3000–10200 ft.)
Distribution
from FNA
AZ; CO; NM; UT; WY
[BONAP county map]
from FNA
CA; CO; ID; NV; OR; UT; WA; WY
[BONAP county map]
Discussion

Variety leucanthus includes two distinct sympatric races: one with lanceolate leaflets (= L. leucanthus), and one with linear leaflets (= L. arizonicus Britton).

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

Variety lanszwertii is found in northern California, western Colorado, central Idaho, western Nevada, eastern Oregon, the Wasatch Mountains of northeastern Utah, southeastern Washington, and north-central Wyoming.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11. FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Lathyrus > Lathyrus lanszwertii Fabaceae > subfam. Faboideae > Lathyrus > Lathyrus lanszwertii
Sibling taxa
L. lanszwertii var. aridus, L. lanszwertii var. bijugatus, L. lanszwertii var. lanszwertii, L. lanszwertii var. pallescens
L. lanszwertii var. aridus, L. lanszwertii var. bijugatus, L. lanszwertii var. leucanthus, L. lanszwertii var. pallescens
Synonyms L. leucanthus, L. arizonicus, L. lanszwertii var. arizonicus
Name authority (Rydberg) Dorn: Vasc. Pl. Wyoming, 171, 297. (1988) unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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