Flora of North America species comparison

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Lathyrus lanszwertii var. leucanthus

Lathyrus lanszwertii var. pallescens
Photo is of parent taxon

Nevada pea
Photo is of parent taxon
Stems

erect, 1–3 dm.

erect to climbing, 2–6 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.

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

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

3–5 cm.

5–10 cm.
Flowers

10–15 mm, corolla white.

10–15 mm, corolla white.
2n

= 28.

Lathyrus lanszwertii var. leucanthus

Lathyrus lanszwertii var. pallescens
Phenology Flowering Apr–Jun. Flowering Apr–Jun.
Habitat In sagebrush, openings in pine, oak, and aspen woodlands. Park­land, thickets, sagebrush, oak, pine, aspen, and mixed conifer woodlands.
Elevation 2000–3200 m. (6600–10500 ft.) 1500–3200 m. (4900–10500 ft.)
Distribution
from FNA
AZ; CO; NM; UT; WY
[BONAP county map]
from FNA
CO; UT; WY
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 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. aridus, L. lanszwertii var. bijugatus, L. lanszwertii var. lanszwertii, L. lanszwertii var. pallescens
L. lanszwertii var. aridus, L. lanszwertii var. bijugatus, L. lanszwertii var. lanszwertii, L. lanszwertii var. leucanthus
Synonyms L. leucanthus, L. arizonicus, L. lanszwertii var. arizonicus
Name authority (Rydberg) Dorn: Vasc. Pl. Wyoming, 171, 297. (1988) 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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