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Thread: Wolly Sundews

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    RL7836's Avatar
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    Quote Originally Posted by [b
    Quote[/b] (Rob-Rah @ Sep. 03 2006,6:46)]I gather that D. subtilis and D. banksii are also related to the petiolaris group.
    Neither of these, nor D. indica are related to plants in the Petiolaris complex. They are all annuals and overlap geographic ranges of some plants in the Petiolaris complex but that doesn't mean they are related ....

    After looking in Lowrie vol III, I'm curious what made you think these 3 plants were related to / or in the Petiolaris complex? None of them appear to have much if any resemblance to petios....
    All the best,
    Ron
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    Stay chooned in for more! Clint's Avatar
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    oh i did not know that about D. banksii

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    Quote Originally Posted by [b
    Quote[/b] ]
    Quote Originally Posted by [b
    Quote[/b] (Rob-Rah @ Sep. 03 2006,6:46)]I gather that D. subtilis and D. banksii are also related to the petiolaris group.
    Neither of these nor D. indica are related to plants in the Petiolaris complex. They are all annuals and overlap geographic ranges of some plants in the Petiolaris complex but that doesn't mean they are related ....
    I was told on a thread quite a while back on the CPUK forum that D. banksii was part of the petiolaris group by someone whose knowledge is usually good. Not sure what his source was for this though, and I suppose scientific wisdom may have changed its mind in the last year and a half:

    http://www.cpukforum.com/forum/viewtopic.php?t=8552
    Quote Originally Posted by [b
    Quote[/b] ]It has only recently been identified as an erect member of the petiolaris-complex.
    Cheers.
    Rob Howe.

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    In his key and in his CP database, Jan Schlauer lists D. banksii as a member of Section Lasiocephala, along with the other "petiolaris complex" species. D. subtilis is grouped off in Section Ergaleium.

    SCHLAUER, J. 1996. A dichotomous key to the genus Drosera L. (Drosera-
    ceae). Carnivorous Plant Newsletter 25: 6788.

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    Quote Originally Posted by [b
    Quote[/b] ]D. subtilis is grouped off in Section Ergaleium.
    Thanks for digging out that ref Forbes. Found a version on wikipedia now too:

    http://en.wikipedia.org/wiki/List_of_Drosera_species

    That's very interesting: so D. subtilis is grouped with some of the tuberous spp - despite looking similar to D. banksii, and almost nothing like most of the rest of the group it's in. I see it also shares that group with D. ramentacea - which is sort of resembles in a way.

    Cheers.
    Rob Howe.

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    RL7836's Avatar
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    Wow! Very different information from what I'd previously read. (Serves me right for not digging at least a little bit!)
    Obviously there must be some justification for this placement. Anyone have any ideas where that piece of literature might be? ... or even better a somewhat simplified translation of the rationale used .... ?
    All the best,
    Ron
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    Hi guys!

    The first important clue that D.banksii belonged with the petiolaris group (and D.neocaledonica NOT) was Takahashi & Sohma's pollen morphology work. Then Kondo added further weight with his chromosome counts (and morphology too). As for D.subtilis, nobody really knows what it's closest to.... yet.

    Best Wishes,
    Fernando Rivadavia

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