D Tokaiensis

[shawnintland]

Hmmmm, I was just looking at some diagrams showing leaf shape and cross section of various Drosea in comparision...if I could only remember which of the few hundred CP web sites I've bookmarked this week it was on we'd be all set! I'll have a look!

[arvin555]

Thanks guys, hope we can figure out the difference together, don't have Tokeinsis only Spatulata but when I saw the photo, I thought, hey that looks like my Spatulata.

The Tokeinsis isn't a hybrid is it?

TTFN
Arvin

[arvin555]

Wait, I just saw David's Growlist and in his collection there is D. Tokeinsis, what surprised me though is that he had it in parenthesis and it said (Spatulata var. Kansai) eh? So is it a Spatulata found in Japan and called differently? Weird!

David can you please comment?

TTFN
Arvin

[shawnintland]

A few notes regarding our discussion;

From Wikipedia - "Drosera tokaiensis is a carnivorous plant native to Japan. The species was previously thought to be a subspecies or variety of Drosera spatulata."

From ;http://www-cp.stech.co.jp/cp/dro/D-tokaiensis_e.html

• spatulata var. kansai = tokaiensis
• spatulata ssp. tokaiensis = tokaiensis

Distribution:Tokai area Japan
Remark: D.tokaiensis = (rotundifolia x spatulata)?
From http://www3.interscience.wiley.com/j...RY=1&SRETRY=0;
Life history traits and coexistence of an amphidiploid, Drosera tokaiensis, and its parental species, D. rotundifolia and D. spatulata (Droseraceae)

Abstract; We compared the life history traits of an amphidiploid species, Drosera tokaiensis (Komiya & C. Shibata) T. Nakamura & Ueda, with those of the parental species, a diploid Drosera rotundifolia L and a tetraploid Drosera spatulata Labill. to characterize them and clarify the conditions for coexistence. The ranges of the parental species are quite different, but overlap in Japan. The amphidiploid and the parents grow together in some natural habitats. Observations and experiments on reproductive properties were carried out in a glasshouse and a laboratory. Seeds of D. rotundifolia were dormant, whereas those of D. spatulata were not. In D. tokaiensis, the dormant/non-dormant seed ratio varied from site to site. Drosera rotundifolia has such life history traits as concentrated flowering and seed dormancy, which are relevant to habitats with short growing seasons and a severe winter. Drosera spatulata has such traits as a prolonged duration of flowering and non-dormancy, relevant to habitats with long growing seasons and a mild winter. Drosera tokaiensis possesses life history traits of the parental species to various degrees, but exhibits no extreme traits. It is suggested that separation of flowering time and autogamy allow the amphidiploid to coexist with the parental species.

From http://www.carnivorousplants.org/see...spatulata.htm;
The species Drosera tokaiensis appears to have resulted from natural hybridization between Drosera rotundifolia and the Kanto form of Drosera spatulata. A plant appearing to be the first generation hybrid is sterile and has been given the name D. tokaiensis ssp. hyugaensis. D. tokaiensis has twice as many chromosomes as D. tokaiensis ssp. hyugaensis and is quite fertile and vigorous.

I'm sure there's more info out there but this should give us something to work from.