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Slender Hawkweed
Hieracium triste
About Slender Hawkweed (Hieracium triste) 0 Nurseries Carry This Plant Hieracium triste is a North American species of hawkweed known by the common name woolly hawkweed. It is widespread across western Canada and the western United States from Alaska, Yukon, and Northwest Territories south as far as California and New Mexico. Hieracium triste is a perennial herb. It produces a milky latex that often is described erroneously as sap. It is 3-35 cm (1. 2-13. 8 in) tall and is unbranched. The stem has long hairs and some hairs that look like stars. The entire plant rarely grows more than 30 cm (12 in; 1 ft) tall. Leaves. Hieracium triste has basal leaves that are often in a rosette. The leaves look similar to a spoon and are 1-8 cm (0. 39-3. 15 in) long and 0. 3-1. 2 cm (0. 12-0. 47 in) wide. Most leaves are either hairless or have short hairs. Flowers. Each plant usually only contains one to two flowers. They are yellow and often look like dandelions. They have bracts around each flower that have grey star shaped hairs and long black gland tipped hairs. These flowers bloom from June to August. Habitat. Slender hawkweed grows in moist to wet open sites. It grows in mid-montane to alpine areas. It is most commonly seen below the timberline in areas with whitebark pine and alpine larch. It likes dry sites at lower elevations from Southern Colorado to Wyoming.
Plant Description
Plant Type
Plant Type
Perennial herb

0.1 - 1.2 ft tall

Flower Color
Flower Color

Wildlife Supported

Butterflies & moths hosted ( 1 likely * ) SHOW ALL

Landscaping Information
Natural Setting
Annual Precipitation: 28.0" - 123.1", Summer Precipitation: 0.43" - 4.17", Coldest Month: 19.1" - 49.4", Hottest Month: 41.0" - 71.7", Humidity: 0.92" - 20.23", Elevation: 3402" - 12924"

Alternative Names
Common Names: Woolly Hawkweed

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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