Flora of North America species comparison

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Lathyrus lanszwertii var. aridus

Lathyrus lanszwertii var. leucanthus
Photo is of parent taxon

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

Nevada pea
Stems

erect, 1–3 dm.

erect, 1–3 dm.
Leaves

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

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

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.
Inflorescences

2–4 cm.

3–5 cm.
Flowers

7–10 mm, corolla white.

10–15 mm, corolla white.
2n

= 14.

= 28.

Lathyrus lanszwertii var. aridus

Lathyrus lanszwertii var. leucanthus
Phenology Flowering Apr–Jun. Flowering Apr–Jun.
Habitat Open ponderosa pine wood­lands, adjacent sagebrush steppes. In sagebrush, openings in pine, oak, and aspen woodlands.
Elevation 800–2000 m. (2600–6600 ft.) 2000–3200 m. (6600–10500 ft.)
Distribution
from FNA
CA; NV; OR; WA
[BONAP county map]
from FNA
AZ; CO; NM; UT; 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 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.)
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. pallescens
Synonyms L. coriaceus subsp. aridus, L. lanszwertii subsp. aridus L. leucanthus, L. arizonicus, L. lanszwertii var. arizonicus
Name authority (Piper) Jepson: Fl. Calif. 2: 389. (1936) (Rydberg) Dorn: Vasc. Pl. Wyoming, 171, 297. (1988)
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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