Flora of North America species comparison

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Lathyrus lanszwertii var. pallescens

Lathyrus lanszwertii var. bijugatus
Photo is of parent taxon
Photo is of parent taxon

drypark pea, pinewood peavine, Sandberg's vetchling
Stems

erect to climbing, 2–6 dm.

erect, sprawling, or climbing, 2–4 dm.
Leaves

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

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

5–10 cm.

2–3 cm.
Flowers

10–15 mm, corolla white.

8–10 mm, corolla pink or blue.

Lathyrus lanszwertii var. pallescens

Lathyrus lanszwertii var. bijugatus
Phenology Flowering Apr–Jun. Flowering Apr–Jun.
Habitat Park­land, thickets, sagebrush, oak, pine, aspen, and mixed conifer woodlands. Edges and openings of coniferous woodlands.
Elevation 1500–3200 m. (4900–10500 ft.) 600–1600 m. (2000–5200 ft.)
Distribution
from FNA
CO; UT; WY
from FNA
ID; MT; WA; BC
[BONAP county map]
Discussion

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.)

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. lanszwertii, L. lanszwertii var. leucanthus
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 Barneby in A. Cronquist et al.: Intermount. Fl. 3(B): 206. (1989) (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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