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Acanthomintha obovata
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San Benito Thorn Mint
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Acanthomintha obovata

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About San Benito Thorn Mint (Acanthomintha obovata) Acanthomintha obovata is a species of flowering plant in the mint family known by the common name San Benito thornmint. It is endemic to California, where it grows in the woodland and chaparral of the coastal mountain ranges in the central part of the state. This is a small annual herb growing up to about 25 centimeters in maximum height. The leaves are about a centimeter long, oval-shaped, and toothed, and those on the upper part of the plant are spiny along the edges. The flower cluster is enfolded in shiny, light-colored leafs with long spines along their margins. The flowers are purple-tipped white and up to 3 centimeters long. They are coated in hairy hairs and their lobes are folded over at the lips.
Plant Description
Plant Type
Annual herb

Max. Height
1.6 - 9.8 in (4.1 - 24.9 cm)

Flower Color
White, Purple

Native Status

Natural Setting
Site Type
Grassy slopes

Sun, Part Shade

Elevation ?
45' - 5762'

Annual Precip. ?
6.2" - 29.5"

Summer Precip. ?
0.17" - 0.83"

Coldest Month ?
33.7° F - 50.0° F

Hottest Month ?
65.9° F - 78.2° F

Humidity ?
1.25 vpd - 29.15 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
San Benito Thornmint, San Benito Thorn-mint

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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