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Howell's Biscuitroot
Lomatium howellii

About Howell's Biscuitroot (Lomatium howellii) Lomatium howellii is an uncommon species of flowering plant in the carrot family known by the common name Howell's biscuitroot, or Howell's lomatium. It is native to the Klamath Mountains of southern Oregon and northern California, where it is a member of the local serpentine soils flora. It is a perennial herb growing up to 80 centimeters tall from a thick, branching taproot. It often lacks a stem, producing upright flower clusters and leaves from ground level. The long leaves may exceed a meter long and are each made up of many oval or rounded toothed leaflets. The flower cluster is an umbel of small yellow or purplish flowers.
Plant Description
Plant Type
Perennial herb

Max. Height
2.6 ft (0.8 m)

Native Status
Natural Setting
Sun, Part Shade

Elevation ?
187' - 5095'

Annual Precip. ?
35.5" - 140.9"

Summer Precip. ?
0.66" - 4.94"

Coldest Month ?
37.0° F - 47.6° F

Hottest Month ?
58.7° F - 72.1° F

Humidity ?
0.35 vpd - 20.54 vpd

Landscaping Information
Common uses
Butterfly Gardens

Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Howell's Lomatium

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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