| Family | GENTIANACEAE |
| Genus species | Gentiana clausa Raf. sect. Pneumonanthe |
| Bibliography | Med. Fl. 1: 210 (1828) |
| Native Range | s. Québec to nw. North Carolina |
| Primary Biome | Temperate |
| Habitat | alluvial gravel |
| Altitude | 0-800m |
| Description | stems rounded, smooth, leaves ovate or lanceolate, acuminate, 3-nerved, flowers in whorls, sessile, clavate, short, closed |
| Size | 20-70cm |
| Color | blue |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | gravelly, humous, moist, sunny site alpine house, moist, humous, gravelly soil, sun |
| Propagation | seed in winter, barely covered, germ. 1-3 months, 10-13°C division in spring; cuttings in late spring |
| Synonyms | Gentiana andrewsii var. intermedia Kusn. Gentiana clausa f. albiflora House Pneumonanthe clausa (Raf.) Greene Xolemia clausa (Raf.) Raf. |
| Territory | 7 Northern America 72 Eastern Canada (QUE Québec) 75 Northeastern U.S.A. (CNT Connecticut, MAI Maine, MAS Masachusettes, NWH New Hampshire, NWJ New Jersey, NWY New York, OHI Ohio, PEN Pennsylvania, RHO Rhode I., VER Vermont, WVA West Virginia) 78 Southeastern U.S.A. (MRY Maryland, NCA North Carolina, TEN Tennessee, VRG Virginia, WDC District of Columbia) |