Flora of North America species comparison

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Lathyrus lanszwertii var. aridus

Lathyrus lanszwertii var. pallescens
Photo is of parent taxon

dryland Nevada pea, Nevada pea, pinewoods peavine
Photo is of parent taxon
Stems

erect, 1–3 dm.

erect to climbing, 2–6 dm.
Leaves

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

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

3–6 cm, usually terminating in well-developed, usually branched tendril;

leaflets 6–8, blades lanceolate, 20–50 × 7–16 mm.
Inflorescences

2–4 cm.

5–10 cm.
Flowers

7–10 mm, corolla white.

10–15 mm, corolla white.
2n

= 14.

Lathyrus lanszwertii var. aridus

Lathyrus lanszwertii var. pallescens
Phenology Flowering Apr–Jun. Flowering Apr–Jun.
Habitat Open ponderosa pine wood­lands, adjacent sagebrush steppes. Park­land, thickets, sagebrush, oak, pine, aspen, and mixed conifer woodlands.
Elevation 800–2000 m. (2600–6600 ft.) 1500–3200 m. (4900–10500 ft.)
Distribution
from FNA
CA; NV; OR; WA
[BONAP county map]
from FNA
CO; UT; WY
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 pallescens is sometimes confused with Lathyrus laetivirens from which it differs in having smaller flowers (10–15 mm versus 15–20 mm in L. laetivirens), and 6–8 lanceolate versus 8–10 ovate leaflets.

(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. lanszwertii, L. lanszwertii var. leucanthus
Synonyms L. coriaceus subsp. aridus, L. lanszwertii subsp. aridus
Name authority (Piper) Jepson: Fl. Calif. 2: 389. (1936) Barneby in A. Cronquist et al.: Intermount. Fl. 3(B): 206. (1989)
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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