Drosera subg. Thelocalyx explained

Drosera subg. Thelocalyx is a subgenus of two species in the genus Drosera.

Description and Distribution

Both 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. burmannii	Southeast Asia and Australia
	D. sessilifolia	Brazil, Guyana, and Venezuela

Taxonomy

Subgenus 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. 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]

See also

• List of Drosera species

Notes and References

1. Rivadavia, Fernando. 1996. Drosera sessilifolia. Carnivorous Plant Newsletter, 25(1): 26-29.
2. Seine, R., and Barthlott, W. 1994. Some proposals on the infrageneric classification of Drosera L. Taxon, 43: 583-589.
3. Schlauer, J. 1996. A dichotomous key to the genus Drosera L. (Droseraceae). Carnivorous Plant Newsletter, 25: 67-88.