| Vernonia lettermannii | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Vernonia |
| Species: | V. lettermannii |
| Binomial name | |
| Vernonia lettermannii Engelm. ex A. Gray | |
| Synonyms | |
|
Cacalia lettermannii (Engelm. ex A. Gray) Kuntze | |
Vernonia lettermannii, the narrowleaf ironweed, is a plant species known only from Arkansas and Oklahoma. It grows on floodplains and terraces at elevations of 100–200 m (330–660 ft).
Vernonia lettermannii is a perennial herb up to 60 cm (24 in) tall. Leaves are filiform (thread-shaped), up to 9 cm (3.5 in) long but less than 3 mm (0.12 in) wide. Flower heads are purple, arranged as a corymb.
References
- Tropicos
- NRCS. "Vernonia lettermannii". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 29 July 2015.
- Flora of North America
- Gray, Asa. Notes on Some Compositae 78. 1880.
- Robinson, H. 1999. Generic and subtribal classification of American Vernonieae. Smithsonian Contributions in Botany 89: i–iii, 1–116.
- Cronquist, A.J. 1980. Asteraceae. 1: i–xv, 1–261. In Vascular Flora of the Southeastern United States. The University of North Carolina Press, Chapel Hill.