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Tetraneuris species [Asteraceae]

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Scientific Name Tetraneuris linearifolia var. linearifolia (Hymenoxys linearifolia) USDA PLANTS Symbol TELIL
Common Name Fine-leaf Four-nerved Daisy ITIS Taxonomic Serial No. 531245
Family Asteraceae (Sunflower) SEINet
Reference
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Description Habitat: Dry areas, roadsides, hillsides, pastures, edges of woods and open areas.
Plant: Upright, slender perennial with stems 6 to 16 inches tall, becoming branched in age.
Leaves: Spatulate basal leaves may have lobes and a couple of teeth on edges; thin, linear stem leaves, all somewhat hairy and with glands.
Inflorescence: Bright yellow solitary flower heads atop naked peduncles 1 to 6 inches long; each flower head about 1-3/4 inch across with 9 to 20 rays toothed at tips; heads becoming smaller through the season; hairy phyllaries beneath.
Bloom Period: March to June.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of the Texas Hill Country" by Marshall Enquist, Vascular Plants of Williamson County and SEINet.
Notes: The yellow-white blossom seen below is very unusual and was the only one found in a field at the Wildflower Center in Austin amid plot of hundreds of plants with yellow blossoms.
BONAP Distribution Map

Texas Status:
Native
Scientific Name Tetraneuris scaposa var. scaposa (Hymenoxys scaposa) USDA PLANTS Symbol TESCS
Common Name Four-nerved Daisy, Plains Yellow Daisy ITIS Taxonomic Serial No. 530628
Family Asteraceae (Sunflower) SEINet
Reference
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Description Habitat: Dry, gravelly soils along roadsides, hillsides, pastures, open areas, edges of woods.
Plant: Upright, slender perennial with a few to many stems 5-1/2 to to 16 inches long; stems are somewhat hairy.
Leaves: Crowded near the base, linear, linear-oblanceolate, oblanceolate, or (rarely) spatulate blades up to 3 inches long, entire edges or with a couple of small lobes; surfaces with glands sunken in pits (usually) and smooth or covered with long soft hairs.
Inflorescence: Solitary head on long, erect peduncle, 0.8 to 1.4 inches across, with a dozen or so bright yellow rays with toothed tips and sometimes with purplish-brown veins; 30 or more darker yellow disk flowers; cup–shaped, hairy involucre with about 20 phyllaries in 2 subequal series; outer phyllaries are broadly lanceolate.
Bloom Period: April and May and again September and October.
References: "Wildflowers of Texas" by Geyata Ajilvsgi, Vascular Plants of Williamson County, Flora of North America and American Southwest.
BONAP Distribution Map

Texas Status:
Native



© Tom Lebsack 2022