Both Drosera burmanni and Drosera sessilifolia are members of the subgenus Thelocalyx, and both are characterized by a 5 part gynoecium, that is, the ovary is in 5 parts vs 3 parts as is common for most droserae. *This fact alone indicates that these species are very ancient forms. *The differences between the two may be seen mainly in the shape of the stigma: in burmanii this divides, and these divisions in turn split. *Drosera sessilifolia has a fan shaped stigma.
Experiments by Ivan Snyder have shown that the 2 species do, in fact, hybridize, and the resulting seed is fertile. *This is another example of how closely related the two species are.
Drosera sessilifolia is native to Brazil and Venezuela. *Seeds which I sent out are from collection made in Cerrado do Guimaraes, Brazil. *The plants habitat there is a boggy grassland Chaparral and the plants are found usually in the lower altitudes. *This seed was originally a gift from the Liberec Botanical gardens, from friend and colleuge Dr. Miroslav Studnicka. *Although this plant has been called the burmanni (joseph, did I spell it right this time) of Brazil, I find it to be very distinct in appearance when compared with burmanni, most notably in regards to the architecture of the scapes and the number of flowers. *Seed is not produced in abundance as is typical for burmanni, *but when it is *produced in my experience has a short viability, and is best sown without storage. *I now have a good crop of plants in cultivation, and look forward to sharing seed as soon (you listening Zach?) as it is produced. *I currently have 3 forms in cultivation, so it appears this species is as variable as burmanni across it's range.
have the plants flowered for you yet? *Seems like I placed the seed of this in good hands! *With germination success like you have had I will for sure be placing some more rare material into your hands!