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Collection Details

Species: Silphium radula Nutt.

Asteraceae Silphium radula Nutt.
Tiana F. Rehman , Bob O'Kennon, Keri Barfield, Kim Norton, Brooke Byerley, Will Godwin, Steve Holm 399

Collection Date: 27 June 2011
Determined By: unknown
Determination Date: unknown
Institution: unknown


Continent: North America

Country: United States of America

Region: Texas

Subregion: Franklin County

Locality Description: Along west side of FM 1896, approximately 20 meters north of the entrance to the Daphne Prairie property.

DD Latitude: 33.2067

DD Longitude: -95.1614

Coordinate uncertainty: 5 m


Habitat Description: On roadside edge of remnant tallgrass prairie in full sun.

Soil Description: Midway formation.

Botanical Data

Plant Notes: Erect herb with bright yellow ray flowers and yellowish-green disk flowers. Stiff white hairs along stems with a purplish blotch at their base, staining the otherwise light coloured stem. Sub-sessile and opposite leaves are densely pubescent as are lower whorl of bracts; inner bracts appear almost glabrous. Growing with: Rumex, Verbena brasiliense, Cynodon dactylon, Rudbeckia maxima, Centaurea americana, Daucus carota. Common.

Min. Height: 1.4 m

Other Data

Research Site: Daphne Prairie

Project: Flora of Franklin County, Texas