Date: Tue, 11 Feb 1997 18:38:12 From: SCHLAUER@chemie.uni-wuerzburg.de To: cp@opus.hpl.hp.com Message-Id: <aabcdefg553$foo@default> Subject: Re: HELP! (_Drosera_ identification)
Dear Jay,
> Drosera alba
> (this isn't just a sneaky way of hiding D. capensis "alba"
> seeds in and among perfectly good (otherwise) sundews, is it?)
Not _D. capensis_. This is a close relative of _D. cistiflora_. It has
almost always white flowers somewhat smaller than those of _D.
cistiflora_ and never with a dark centre.
> Drosera trinervia
One of the most frequently confused (and at the same time one of the
systematically most interesting) S AF _Drosera_ species. It does
*never* have intrapetiolar stipules (unlike _D. cuneifolia_ or _D.
aliciae_ with which it is mostly confused), but the rudiments of the
stipules form two deciduous lateral setae at the petiole base. These
are easily overlooked because they are sometimes hidden among simple
hairs of the petiole. Their true nature becomes evident if a leaf is
detached from the rosette at its very base, however. The stipule
remnants can then be seen to originate at the base of the leaf and not
from the surface of the petiole.
The two other S AF species which have similar leaf bases, viz. _D.
acaulis_ and _D. pauciflora_ are usually much larger plants with much
larger flowers.
Kind regards
Jan
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