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Howell's Lousewort
Pedicularis howellii
About Howell's Lousewort (Pedicularis howellii) 0 Nurseries Carry This Plant Pedicularis howellii is an uncommon species of flowering plant in the broomrape family known by the common name Howell's lousewort. It is endemic to the Siskiyou Mountains of the Klamath Range in southern Oregon and northern California, where it grows on the edges of coniferous forests. This is a perennial herb producing one or more stems up to 45 centimeters tall from a long caudex. The leaves are up to 20 centimeters long, lance-shaped, and divided into many toothed oval lobes; those higher on the stem may be unlobed. The basal leaves fall away early. The inflorescence is a small raceme of flowers occupying the top of the stem. Each white to light purple flower is up to a centimeter long and is sickle-shaped, with a curved beak-like upper lip and a three-lobed lower lip which may be tucked into the hairy mass of sepals. The plant is pollinated by bumblebees including Bombus mixtus. Between the flowers are hairy to woolly triangular bracts. The fruit is a capsule just under a centimeter long containing seeds with netted surfaces. The plant probably relies on an adequate amount of snow in the area to keep enough moisture in the soil for germination the following season.
Plant Description
Plant Type
Plant Type
Perennial herb

1.5 ft tall

Flower Color
Flower Color
White, Purple

Wildlife Supported

Butterflies & moths hosted ( 3 likely * ) SHOW ALL

Landscaping Information
Natural Setting
Annual Precipitation: 53.7" - 158.7", Summer Precipitation: 1.56" - 5.81", Coldest Month: 34.7" - 43.0", Hottest Month: 54.3" - 63.7", Humidity: 2.33" - 15.76", Elevation: 4079" - 6138"

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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