Bradburia hirtella

Bradburia hirtella Torr. & A. Gray is native to Texas and Louisiana.  It includes herbaceous annuals over most of the limited range and very rarely perennials known from the southern most population.  The species is distinquished by it staminate disc florets (ovary sterile) and pistillate and fertile ray florets (Semple 2006 FNA).  The pappus of the disc florets is very irregular (Semple 2006).

Chrysopsis texana G. L. Nesom is a synonym.

Bradburia hirtella, leaf morphology and anatomy, revised Fig 7-11, Semple & Chinnappa 1984

Semple & Chinnappa (1984) experimentally produced an F1 hybrid with 2n=7 from the common 2n=6 race and the rare 2n=8 race of B. hirtella.

Semple, J.C. and C.C. Chinnappa. 1984. Observations on the cytology, morphology and ecology of Bradburia hirtella (Compositae-Astereae). Syst. Bot. 9: 95-101.

Semple, J.C. 2006. Quadruple, triple, double, and simple pappi in the goldenasters, subtribe Chrysopsidinae (Asteraceae: Astereae).  Sida 22 (1): 503-531.

Last revised 17 April 2025 by J.C. Semple

© 2025 J.C. Semple, including all photographs unless otherwise indicated

Bradburia hirtella, habitat, Fayette Co., Texas
Bradburia hirtella,mid size plant, Fayette Co., Texas
Bradburia hirtella, large plant, Fayette Co., Texas
Bradburia hirtella S & Bt 3344 WAT
Bradburia hirtella, ray floret fruit and pappus
Bradburia hirtella, ray fruit and pappus, closer
Bradburia hirtella, ray fruit and pappus, close-up
Bradburia hirtella disc floret pappus

1-8. Bradburia hirtella. 1. Habitat, Fayette Co., Texas. 2. Mid size plant, Fayette Co., Texas. 3. Large plant, Fayette Co., Texas. 4. Large post-flowering dried plant, Semple & Brouillet 3344 WAT, Dewitt Co., Texas. 5-7. Ray floret fruit and pappus, and base of pappus bristles. 8.  Disc floret and pappus, from Semple (2006).