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Slender Vetch
Vicia hassei

About Slender Vetch (Vicia hassei) Vicia hassei is a species of vetch known by the common names Hasse's vetch and slender vetch. It is native to the west coast of North America from Oregon through California to Baja California, where it occurs in many types of coastal and inland habitat. Vicia hassei is an annual herb. The leaves are made up of a few pairs of leaflets up to 2. 5 centimeters long often with flat, notched, or toothed tips. The inflorescence is usually a solitary flower or a pair of flowers with white or lavender corollas just under a centimeter long. The fruit is a legume pod 2 or 3 centimeters in length and a few millimeters wide which contains the seeds.
Plant Description
Plant Type
Annual herb, Vine

Max. Height
0.7 - 2.3 ft (0.21 - 0.7 m)

Flower Color
White, Lavender

Native Status

Natural Setting
Elevation ?
9' - 4135'

Annual Precip. ?
9.0" - 51.0"

Summer Precip. ?
0.13" - 1.47"

Coldest Month ?
39.9° F - 56.3° F

Hottest Month ?
60.7° F - 80.2° F

Humidity ?
0.10 vpd - 27.17 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Hasse's Vetch

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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