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Turpentine Weed
( Trichostema laxum )
Trichostema laxum
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Turpentine Weed (Trichostema laxum)
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Trichostema laxum
is a species of flowering plant in the mint family, known by the common name turpentine weed from the foliage's scent. The annual plant is native to northern California and Oregon, at elevations below 1,700 metres (5,600 ft). It is found primarily in the Inner Northern California Coast Ranges, including the subranges of the Klamath Mountains and the Mayacamas Mountains. It grows in gravelly streambanks or sandy soil, of the mountains and foothills in chaparral, Foothill oak woodland, and Yellow pine forest habitats. The species has an affinity for serpentine soils.
Trichostema laxum
is an annual herb approaching 5 decimetres (1. 6 ft) in maximum height. Its aromatic foliage, with a strong turpentine odor, is coated in glandular and nonglandular hairs. The lanceolate to narrowly ovate leaves are up to 7 centimeters long. The inflorescence is a series of clusters of flowers located at each leaf pair. Each flower has a hairy calyx of green or reddish sepals and a tubular, lipped purple corolla. The four stamens are long and curved, measuring up to 1. 6 centimeters in length. Its bloom period is from June to October.
Plant Description
Plant Type
Annual herb
Size
1.6 ft tall
Wildlife Supported
Butterflies & moths hosted ( 3
likely
* )
SHOW ALL
*
Variable Checkerspot
Euphydryas chalcedona
Euphydryas chalcedona
*
Anstenoptilia marmarodactyla
Anstenoptilia marmarodactyla
*
Western Avocado Leafroller Moth
Amorbia cuneana
Amorbia cuneana
Landscaping Information
Common uses
Bee Gardens
Natural Setting
Climate
Annual Precipitation: 11.0" - 84.5", Summer Precipitation: 0.34" - 3.91", Coldest Month: 18.4" - 50.5", Hottest Month: 39.7" - 74.9", Humidity: 0.18" - 24.80", Elevation: 46" - 10940"
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Turpentine Weed
Trichostema laxum
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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