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| Scientific Name | Gutierrezia microcephala (Xanthocephalum microcephalum) | USDA PLANTS Symbol | GUMI |
| Common Name | Threadleaf Snakeweed, Smallhead Snakeweed | ITIS Taxonomic Serial No. | 37482 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description |
Habitat: Dry, gravelly or rocky limestone or gypsum soils in grasslands, brushlands or woodlands, often in disturbed or overgrazed areas; from 1,000 to 7,000 ft. Plant: Perennial subshrub 12 to 40 inches tall, leafy, much-branched stems from a woody base. Leaves: Alternate, primary leaves linear to linear-oblanceolate, 3/4 to 2 inches long and about 3/16-inch or less wide; often deciduous by flowering; clusters of shorter and narrower secondary leaves in axils of primary leaves; surfaces usually smooth and sticky. Inflorescence: Many small composite yellow flower heads usually in clusters of 3 or more in corymbs atop the stems; each small blossom with 1 or 2 ray florets about 3/16-inch long and usually just one disk floret; phyllaries whitish or yellowish with green tips. Bloom Period: June to October. References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, Flora of North America and SEINet. |
BONAP Distribution Map |
Texas Status: Native |
| Scientific Name | Gutierrezia sarothrae (Xanthocephalum sarothrae) | USDA PLANTS Symbol | GUSA2 |
| Common Name | Broom Snakeweed | ITIS Taxonomic Serial No. | 37483 |
| Family | Asteraceae (Sunflower) | SEINet Reference |
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| Description |
Habitat: Dry soils in open areas; common in sagebrush-grassland, pinyon-juniper, and desert shrub communities; 3000 to 7000 ft. Plant: Perennial subshrub, 6 to 36 inches tall; multiple, leaning stems giving a rounded symmetrical crown densely covered with small bright yellow flowers. Leaves: Alternate stem leaves, linear to lanceolate, sometimes filiform, less than 1.2 inches long and 0.1-inch wide; lower leaves absent at flowering. Inflorescence: Dense, flat-topped panicles of small composite flowers about 0.5-inch across; 3 to 8 yellow ray florets and 3 to 9 yellow disk florets in the center; involucres are cylindrical to bell-shaped with whitish overlapping phyllaries with green tips. Bloom Period: May to October. References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Flora of Colorado" by Jennifer Ackerfield, SW Colorado Wildflowers and SEINet |
BONAP Distribution Map
Map Color Key |
Texas Status: Native |
