Flora of North America species comparison

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Lathyrus lanszwertii var. lanszwertii

Lathyrus lanszwertii var. aridus
Photo is of parent taxon

lanszwert's pea, Nevada pea, thick-leaf peavine
Photo is of parent taxon

dryland Nevada pea, Nevada pea, pinewoods peavine
Stems

sprawling or climbing, 4–8 dm.

erect, 1–3 dm.
Leaves

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

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

2–4 cm, terminating in simple bristle, usually less than 1 cm;

leaflets 4–8, blades linear, 20–40 × 2–5 mm.
Inflorescences

3–9 cm.

2–4 cm.
Flowers

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

7–10 mm, corolla white.
2n

= 14, 28.

= 14.

Lathyrus lanszwertii var. lanszwertii

Lathyrus lanszwertii var. aridus
Phenology Flowering Mar–Jun. Flowering Apr–Jun.
Habitat Parkland, thickets, sagebrush, juniper, pine, and aspen woodlands. Open ponderosa pine wood­lands, adjacent sagebrush steppes.
Elevation 900–3100 m. (3000–10200 ft.) 800–2000 m. (2600–6600 ft.)
Distribution
from FNA
CA; CO; ID; NV; OR; UT; WA; WY
[BONAP county map]
from FNA
CA; NV; OR; WA
[BONAP county map]
Discussion

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.)

Variety aridus is known from the eastern flanks of the Sierra Nevada in California and western Nevada and in the Cascade Range north to south-central Washington. It appears to intergrade with var. lanszwertii in central Washington and Oregon.

(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. leucanthus, L. lanszwertii var. pallescens
L. lanszwertii var. bijugatus, L. lanszwertii var. lanszwertii, L. lanszwertii var. leucanthus, L. lanszwertii var. pallescens
Synonyms L. coriaceus subsp. aridus, L. lanszwertii subsp. aridus
Name authority unknown (Piper) Jepson: Fl. Calif. 2: 389. (1936)
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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