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Blazing Star
Mentzelia gracilenta
About Blazing Star (Mentzelia gracilenta) 0 Nurseries Carry This Plant Mentzelia gracilenta, known by the common names blazing star, grass blazingstar, and slender blazing star, is a species of flowering plant in the family Loasaceae. The plant is endemic to California, where it is known only from the Southern California Coast Ranges and Western Transverse Ranges of Central and Southern California. Much of its range is within the Los Padres National Forest. It grows in grasslands, oak woodlands, and rugged mountain habitats including serpentine soils and rocky slopes. The plant is found from 20-1,700 metres (66-5,577 ft) in elevation. It intergrades with Mentzelia ravenii, Mentzelia montana, and Mentzelia veatchiana. Mentzelia gracilenta is an annual herb producing an erect greenish stem sometimes exceeding 0. 5 metres (1. 6 ft) in maximum height. The leaves are divided deeply into comblike lobes, the longest in the basal rosette 13 centimeters long and those higher on the stem reduced in size. The inflorescence is a cluster of flowers each with five shiny yellow petals dotted with red at the bases, measuring roughly one to two centimeters long. The fruit is a narrow, curving utricle containing many tiny, angular seeds.
Plant Description
Plant Type
Plant Type
Annual herb

1.6 ft tall

Flower Color
Flower Color
Yellow, Red

Landscaping Information
Natural Setting
Annual Precipitation: 5.6" - 44.1", Summer Precipitation: 0.17" - 1.89", Coldest Month: 35.8" - 51.7", Hottest Month: 59.9" - 77.9", Humidity: 1.28" - 30.45", Elevation: 462" - 6971"

Alternative Names
Common Names: Grass Blazingstar, Slender Blazing Star, Slender Blazingstar

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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