The following Participating Institutions are custodians for this species in the CPC National Collection:
The Lady Bird Johnson Wildflower Center
San Antonio Botanical Garden
The conservation of Streptanthus bracteatus is fully sponsored.
Cindy Barrett contributed to this Plant Profile.
This beautiful plant is found in Texas Hill country. Once scattered throughout south-central Texas, this species is now thought to be rare, and has been considered for federal status.
The Bracted twistflower is an herbaceous, somewhat succulent waxy annual. It produces beautiful lavender-purple flowers from spring to early summer. Its name is derived from the fact that, located at the bottom of each flower stalk, is a tiny bract. This unique feature distinguishes the species from others in the genus. Indigeneous people and european settlers utilized related species as a food source. (Damude and Poole 1990).
Distribution & Occurrence
Found in a number of varied habitats on thin clay soils in the semi-arid to mesic woodland habitat of the Balcones Canyonlands region of the Edwards Plateau. Proximity appears to be one of the few strict requirements for the species. Most of the known populations occur in Texas Hill Country. (Damude and Poole 1990)
|Current population trends are unknown. In 1990 there were eight known sites containing 14 population clusters with 3 to over 500 plants per population. (Damude and Poole 1990)|
Conservation, Ecology & Research
It is likely that pollinators are required for successful reproduction. Only one species of bee (Magachile comata) has been observed on flowers that may be capable of pollinating this species. (Dieringer 1991)
Habitat alteration by fire suppression
(Damude and Poole 1990)
Response to disturbance
Enquist, M. 1987. Wildflowers of the Texas Hill Country. Austin, Texas: Lone Star Botanical. 275p.