| Family | APOCYNACEAE |
| Genus species | Amsonia tharpii Woodson |
| Bibliography | Ann. Missouri Bot. Gard. 35: 237 (1948) |
| Native Range | New Mexico to Texas |
| Primary Biome | Subtropical |
| Habitat | sandy grassland |
| Altitude | 900-1200m |
| Description | leaves subsessile, crowded, to 5cm long, lower elliptic-lanceolate, the upper linear to linear-lanceolate, crateriform, tube ca. 15mm |
| Size | 10-20cm |
| Color | pale blue, green-white |
| Bloom | spring |
| Ca | |
| Type | perennial |
| Cultivation | sunny site with a poor, sandy soil alpine house, sandy soil, sun |
| Propagation | seed in spring, uncovered, germ. 1 month, 13-16°C cuttings in late summer |
| Territory | 7 Northern America 77 South-Central U.S.A. (NWM New Mexico, TEX Texas) |