Comprehensive Description

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General: Sunflower Family (Asteraceae). Broom snakeweed is a perennial subshrub that ranges from 2 to 10 dm in height. It is native to the U.S. The stems are bushy and branch upwards from the woody base. The non-woody stems range from smooth to having some short hairs. The stems may be resinous and therefore sticky when touched. The leaves are alternate and range from linear to linear and threadlike in shape. The leaves are from 5 to 60 mm long and 1 to 3 mm wide. Dense clusters of flowers form at the ends of the stems. There are 3 to 8 ray florets per cluster and 2 to 6 disk florets per cluster. The flattened part of the ray corolla or ligule is yellow in color and 1 to 3 mm long. The whorl of bracts that is found at the base of the flower cluster is 3 to 6 mm tall and 2 mm across. The bracts are narrow and green in color at the apex and along the midnerve. The achenes have a modified calyx consisting of 8 to 10 acute scales. The acute scales of the ray achenes are about one-half as long as those of the disk achenes.

Distribution: For current distribution, please consult the Plant Profile page for this species on the PLANTS Web site.


Public Domain

USDA NRCS National Plant Data Center

Source: USDA NRCS PLANTS Database

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