Species: Lathyrus holochlorus

Thinleaf Peavine
Species
Plants

A rhizomatous, climbing perennial herb, hairless or sparsely hairy, with stems 30-100 cm long. Leaves are compound with 6-12 egg- to ellipse-shaped, 2-5 cm x 0.7-3 cm leaflets and egg-shaped stipules that are generally one-fifth to one-half as long as the leaflets; leaves end in a tendril. There are 5 to 15, 13-17 mm long whitish flowers per stem that turn light brown or orange as they age. The banner petal of each flower is purplish-rose lined. Fruits are pods 3-5 cm long and 4-7 mm broad.

Source: Encyclopedia of Life

Kingdom
Plantae
Phylum
Anthophyta
Class

Dicotyledoneae

Order

Fabales

Family

Fabaceae

Genus

Lathyrus

Natureserve Explorer
Source:
ELEMENT_GLOBAL.2.129880
Classification
Other Global Common Names
thinleaf pea
Informal Taxonomy
Plants, Vascular - Flowering Plants - Pea Family
Formal Taxonomy
Plantae - Anthophyta - Dicotyledoneae - Fabales - Fabaceae - Lathyrus

A rhizomatous, climbing perennial herb, hairless or sparsely hairy, with stems 30-100 cm long. Leaves are compound with 6-12 egg- to ellipse-shaped, 2-5 cm x 0.7-3 cm leaflets and egg-shaped stipules that are generally one-fifth to one-half as long as the leaflets; leaves end in a tendril. There are 5 to 15, 13-17 mm long whitish flowers per stem that turn light brown or orange as they age. The banner petal of each flower is purplish-rose lined. Fruits are pods 3-5 cm long and 4-7 mm broad.

Source: Encyclopedia of Life

Short General Description
Rhizomatous, climbing perennial herb with stems up to 1 m long. Leaves have 6 to 12 oval leaflets and end in a tendril. The pealike flowers are whitish, turning light brown or orange as they age. Legume fruits are up to 5 cm long. Flowers from April to July, with most flowering in May and June.
Reproduction Comments
Capable of reproducing by rhizomes as well as seeds. Flowers are protandrous (stigmas developing after the anthers), decreasing the likelihood of self-pollination. In fact, evidence suggests that this plant is obligately outcrossed with a genetic incompatibility. Some small populations monitored for 2-4 years have failed to produce seed in spite of observed pollinators; these populations may represent one self-incompatible clone. Seed production in the wild thus appears to be limited by the availability of compatible pollen in at least some populations; combined with seed predation by pea weevils of the family Bruchidae, the result in that, in many populations, few good seeds are found (Broich 1983 cited in Wilson et al. 1993).
NatureServe Global Status Rank
G2
Global Status Last Reviewed
2008-08-20
Global Status Last Changed
2005-03-30
Conservation Status Map
<img src="http://www.natureserve.org/explorer/servlet/GetMapGif?US.OR=S2&US.WA=S1" alt="Conservation Status Map" style="width: 475px; height: auto;" />
Global Range
Occurs in the Willamette and Umpqua Valleys in western Oregon, ranging from Washington County south to Lane County. Also occurs somewhat disjunctly (approximately 125 km distant) in Lewis County, southwest Washington. Using GIS tools, range extent was estimated to be approximately 21,500 square km; if Washington occurrences were considered extremely disjunct and excluded, range extent would be approximately 12,000 square km.
ELEMENT_GLOBAL.2.129880