Drosera sect. Thelocalyx is a section of two species in the subgenus Drosera of genus Drosera.
| Drosera sect. Thelocalyx | |
|---|---|
| |
| Drosera sessilifolia | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Droseraceae |
| Genus: | Drosera |
| Subgenus: | Drosera subg. Drosera |
| Section: | Drosera sect. Thelocalyx Planch. |
| Type species | |
| D. burmanni | |
| Species | |
| Synonyms | |
| |
Description and distribution
editBoth species appear to be very similar and are often confused in cultivation; both have small leaves arranged in a rosette and are annual plants. Their distributions do not overlap.[1][2]
| Image | Scientific name | Distribution |
|---|---|---|
 |
D. burmanni Vahl | Southeast Asia and Australia |
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D. sessilifolia A.St.-Hil. | Brazil, Guyana, and Venezuela |
Taxonomy
editSection Thelocalyx was first described by Jules Émile Planchon in 1848 and was later moved to the rank of subgenus in 1891 by Carl Georg Oscar Drude. It was later moved back to sectional rank by Rüdiger Seine and Wilhelm Barthlott in 1994.[2] In 1996, Jan Schlauer revised the infrageneric taxonomy and supported the subgeneric rank, citing the pentamerous gynoecium and suggesting that the two species are relatively primitive with respect to other species in the genus.[3] However, molecular phylogenetic analysis by Rivadavia, Kondo, Kato and Mitsuyasu in 2003 supported returning it to section rank within subgenus Drosera.[4]
See also
editReferences
edit- ^ Rivadavia, Fernando. 1996. Drosera sessilifolia. Carnivorous Plant Newsletter, 25(1): 26-29.
- ^ a b Seine, R., and Barthlott, W. 1994. Some proposals on the infrageneric classification of Drosera L. Taxon, 43: 583-589.
- ^ Schlauer, J. 1996. A dichotomous key to the genus Drosera L. (Droseraceae). Carnivorous Plant Newsletter, 25: 67-88.
- ^ Rivadavia, Fernando; Kondo, Katsuhiko; Kato, Masahiro; Hasebe, Mitsuyasu (2003). "Phylogeny of the Sundews, Drosera (Droseraceae), based on chloroplast rbcL and nuclear 18S ribosomal DNA sequences". American Journal of Botany. 90 (1): 123–130. doi:10.3732/ajb.90.1.123. Retrieved 28 September 2024.
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