Brickelliastrum
| Brickelliastrum | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Subfamily: | Asteroideae |
| Supertribe: | Helianthodae |
| Tribe: | Eupatorieae |
| Genus: | Brickelliastrum |
Brickelliastrum is a genus of flowering plants in the tribe Eupatorieae of the daisy family, Asteraceae.[1] At present it contains a total of two species. Brickelliastrum has at times been lumped with Brickellia or Steviopsis, but chromosome number (x=10) and molecular data are in agreement in showing that it is distinct from either of these.[2] Despite having the general appearance of Brickellia, members of Brickelliastrum have cypselae that have only 5-7 ribs (vs. 10), funnelform corollas, and a style with an unenlarged, glabrous base.
Taxonomy
Brickelliastrum was described by King & Robinson (1972) [3] to include a single species, Brickelliastrum fendleri that was originally named in Brickellia by Asa Gray. Brickelliastrum fendleri occurs in the southwestern U.S. and northwestern Mexico.[4] A second species known only from Mexico was added that was originally described as a Steviopsis by Turner [5] and later transferred to Brickelliastrum as Brickelliastrum nesomii.[6]
References
- ↑ D.J.N.Hind & H.E.Robinson. 2007. Tribe Eupatorieae In: The Families and Genera of Vascular Plants vol.VIII. (Joachim W.Kadereit & Charles Jeffrey, volume editors. Klaus Kubitzky, general editor). Springer-Verlag. Berlin, Heidelberg.
- ↑ Schilling, E. E., J. L. Panero, B. S. Crozier & P. Davila. 2013. Relationships of Asanthus (Asteraceae, Eupatorieae). Systematic Botany 38: 253-258.
- ↑ King, R. M. and H. Robinson. 1972 Studies in the Eupatorieae (Asteraceae) LXXVIII. A new genus, Brickelliastrum. Phytologia 62: 63-64.24(2): 64. 1972.
- ↑ Brickelliastrum in Flora of North America
- ↑ Turner, B. L. 1990. A new species of Steviopsis (Asteraceae: Eupatorieae) from Nuevo Leon, Mexico. Phytologia 68: 410-412.
- ↑ King, R. M. and H. Robinson. 1995. Generic limits in the Alomiinae (Eupatorieae - Asteraceae), and new combinations in Brickelliastrum and Barroetea. Phytologia 78: 124-126.