Flora of North America species comparison

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Lathyrus lanszwertii var. lanszwertii

Lathyrus lanszwertii var. bijugatus
Photo is of parent taxon

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

drypark pea, pinewood peavine, Sandberg's vetchling
Stems

sprawling or climbing, 4–8 dm.

erect, sprawling, or climbing, 2–4 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.

0.5–2 cm, terminating in simple bristle less than 1 cm;

leaflets 2–4, blades lanceolate or linear, 20–50 × 4–15 mm or 30–90 × 2–5 mm.
Inflorescences

3–9 cm.

2–3 cm.
Flowers

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

8–10 mm, corolla pink or blue.
2n

= 14, 28.

Lathyrus lanszwertii var. lanszwertii

Lathyrus lanszwertii var. bijugatus
Phenology Flowering Mar–Jun. Flowering Apr–Jun.
Habitat Parkland, thickets, sagebrush, juniper, pine, and aspen woodlands. Edges and openings of coniferous woodlands.
Elevation 900–3100 m. (3000–10200 ft.) 600–1600 m. (2000–5200 ft.)
Distribution
from FNA
CA; CO; ID; NV; OR; UT; WA; WY
[BONAP county map]
from FNA
ID; MT; WA; BC
[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 bijugatus, which is found from southern British Columbia to eastern Washington, northern Idaho, and western Montana, includes two distinct sympatric races: one with lanceolate leaflets (= L. bijugatus var. bijugatus in the sense of White), and one with linear leaflets (= L. bijugatus var. sandbergii).

(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. aridus, L. lanszwertii var. lanszwertii, L. lanszwertii var. leucanthus, L. lanszwertii var. pallescens
Synonyms L. bijugatus, L. bijugatus var. sandbergii
Name authority unknown (T. G. White) Broich: Madroño 54: 371. (2008)
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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