Flora of North America species comparison

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Lathyrus lanszwertii var. aridus

Lathyrus lanszwertii var. lanszwertii
Photo is of parent taxon

dryland Nevada pea, Nevada pea, pinewoods peavine
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

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

leaflets 4–8, blades linear, 20–40 × 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

2–4 cm.

3–9 cm.
Flowers

7–10 mm, corolla white.

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

= 14.

= 14, 28.

Lathyrus lanszwertii var. aridus

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

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.)

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