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Lupinus hirsutissimus

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About Stinging Lupine (Lupinus hirsutissimus) Lupinus hirsutissimus is a species in the Fabaceae (Legume) family known by the common name stinging lupine. It is native to the coastal mountains of Baja California and California as far north as the San Francisco Bay Area, where it grows on dry mountain slopes, including areas that have recently burned. It is an erect annual herb growing 20 centimeters to one meter tall; it may exceed one meter in habitat recovering from wildfire. The stem and herbage are coated in long, stiff hairs that sting skin when touched. Each palmate leaf is made up of 5 to 8 leaflets up to 5 centimeters long and 1 or 2 wide. The flower cluster bears several flowers generally not arranged in whorls. Each flower is between 1 and 2 centimeters long and purple to dark pink in color with a yellowish to pinkish spot on its banner. The fruit is a hairy legume pod up to 4 centimeters long.
Plant Description
Plant Type
Perennial herb, Annual herb

Max. Height
0.7 - 3.3 ft (0.21 - 1 m)

Max. Width
1 ft (0.3 m)

Flower Color
Pink, Purple

Flowering Season

Native Status

Natural Setting
Site Type
Openings in chaparral or coastal sage scrub, dry rocky slopes or flats, recently burned areas


Elevation ?
7' - 6666'

Annual Precip. ?
3.5" - 46.1"

Summer Precip. ?
0.14" - 2.34"

Coldest Month ?
39.9° F - 59.4° F

Hottest Month ?
62.3° F - 88.1° F

Humidity ?
0.47 vpd - 39.05 vpd

Soil Description
Tolerates a variety of soils as long as adequate drainage is provided


Companion Plants
Works well most chaparral plants as well as numerous annuals and herbaceous perennials

Landscaping Information
Water Requirement ?
Extremely Low, Very Low
Extremely Low
Very Low
Moderate - High

Max. Summer Water ?
No Summer Water
Keep moist

Propagation ?
For propagating by seed: Fresh seeds need no treatment. Stored seeds scarification or hot water; No treatment may give fair germination.

Common uses
Bird Gardens, Butterfly Gardens, Bee Gardens

Nursery Availability
Sometimes Available

Other Names
Common Names
Stinging Annual Lupine

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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