Where is Prairie Dawn (Hymenoxys texana)
located in the wild?
Grows within a narrow range of soil and site conditions in the open grasslands of the northern part of the Gulf Prairie region. Slick areas composed of fine-sandy compacted soil occur in seasonally wet depressions or saline swales at the periphery of low mounds termed mima or pimple mounds (Stark 1996). The upper 7 inches of the soils, in the Narta soil series, are poorly drained and are powdery when dry and sticky and soft when wet. These soils are often saline and moderately alkaline. Little water is available to plant roots beyond the upper 7 inches. Plants endure soil conditions ranging from saturated during the winter to droughty in the summer. Hymenoxys texana also persists in the low areas of abandoned rice fields, vacant lots, and pastures where mima mounds have been bulldozed and natural vegetation has returned. Prairie Dawn does not colonize recently disturbed soils and is susceptible to competition.Plants that grow in association with Prairie Dawn include Short-spike Windmillgrass, the rare Texas Windmillgrass, Gulf Cordgrass, Whorled Dropseed, Filly Panicum, Little Barley, Annual Bentgrass, Bearded Flatsedge, False Onion, Bottlebrush Plantain, Pepperweed, Sandparsley, the rare Houston Camphor Daisy, Western Dwarf-dandelion, Chaffweed, Golden Hedgehyssop, Common evax, Prairie Flameflower, Purslane, Wine-cup, Cotton-flower, Silky Evolvulus and Bracted Sida (Stark 1996).
Endemic to the Gulf Coastal Prairie of Harris, Fort Bend and Trinity Counties, Texas.
States & Provinces:
Prairie Dawn can be found in Texas