Thymophylla species

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Scientific Name Thymophylla acerosa (Dyssodia acerosa) USDA PLANTS Symbol
Common Name Pricklyleaf Dogweed ITIS Taxonomic Serial No.
Family Asteraceae (Sunflower) SEINet Reference
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Description Habitat: Dry, rocky, calcareous soils.
Plant: Short perennial 4 to 10 inches tall; woody branches from base; strong odor.
Leaves: Very narrow, pointed opposite, linear leaves 3/8 to 3/4 inches long.
Inflorescence: Composite flower heads about 1 inch across, with 7 to 9 or more yellow rays and 18 to 25 yellow disk florets in the center.
Bloom Period: Throughout the year, mostly summer and fall.
References: SEINet and Southwest Desert Flora.
Note: Previously misidentified; corrected thanks to Chuck Sexton of Austin, TX.
Texas Status
Scientific Name Thymophylla pentachaeta (Dyssodia pentachaeta) USDA PLANTS Symbol
Common Name Five-needle Pricklyleaf, Parralena ITIS Taxonomic Serial No.
Family Asteraceae (Sunflower) SEINet Reference
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Description Habitat: Dry, gravelly, calcareous soils.
Plant: Low-growing, strong-scented, branched annual or short-lived perennial 6 to 12 inches tall.
Leaves: Opposite grayish-green to dark green leaves divided into 5-11 narrow, stiff, hairy lobes with glands.
Inflorescence: Bright yellow composite flower heads about 5/8-inch across on stalks up to 4 inches long with 12 to 21 rays and 16 to 70 disk florets in the center; phyllaries below are dotted with dark glands.
Bloom Period: Most of the year.
References: "Wildflowers of Texas" by Geyata Ajilvsgi and SEINet.
Texas Status

© Tom Lebsack 2019