| Abronia macrocarpa | |
|---|---|
| Conservation status | |
|
Imperiled (NatureServe) |
|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Core eudicots |
| Order: | Caryophyllales |
| Family: | Nyctaginaceae |
| Genus: | Abronia |
| Species: | A. macrocarpa |
| Binomial name | |
| Abronia macrocarpa L.A.Galloway |
|
Abronia macrocarpa is a rare species of flowering plant known by the common name large-fruited sand verbena. It is endemic to eastern Texas, where it is known from three counties.[1][2] It inhabits harsh, open sand dunes on savannas, growing in deep, poor soils.[3] It was first collected in 1968 and described as a new species in 1972.[3][4] It is a federally listed endangered species of the United States.
This is a perennial herb with a hairy, glandular stem growing up to half a meter tall. The glandular oval leaf blades are up to 5 centimeters long by 3.5 wide and are borne on relatively long petioles. The inflorescence is a cluster of up to 75 magenta or light purple flowers each up to 3 centimeters long. The tubular, strongly fragrant flowers open at dusk and are pollinated by moths.[3] The winged fruit is up to 1.5 centimeters long. It is dispersed by wind.[3]
Threats to this endangered species include habitat loss as its range is consumed for development and oil exploration.[2][3] The habitat is also damaged by off-road vehicles, people on foot and on horseback, fire suppression activity, and the invasion of non-native species such as bermudagrass and weeping lovegrass (Eragrostis curvula).[2][3]
The total remaining number is estimated at several thousand individual plants in nine populations.[3]