Date: Mon, 20 Jan 1997 19:28:19 +0100 From: steiger@iae.unibe.ch (Juerg Steiger) To: cp@opus.hpl.hp.com Message-Id: <aabcdefg281$foo@default> Subject: Re: Pinguicula identification
Jens
I can't answer your first question, but the second one:
>2) How can I tell P. vulgaris from P.alpina in winter ?
P. alpina is the only subalpine/subarctic northern species with perennial
roots: The winter buds cannot be easily removed from the ground as they are
fixed on it with their relatively strong, yellowish-brownish roots. The
distal end of the winter buds is more pointed than in P. vulgaris. P.
vulgaris has tender whitish roots decaying in winter: Its winter buds are
only weakly fixed on the ground and can easily be removed. Another
distinction: If you open winter buds of adult P. alpina - an early
flowering species - you will find in its 'heart' already well developed
flower buds of 1.5-3 mm diameter. Opened hibernacula of P. vulgaris -
which flowers 2-5 weeks after P. alpina at common sites - do not show
flower buds or only very embryonic ones of less than 0.5 mm diameter. A
third difference: The brood buds (gemmae) at the basis of a P. vulgaris
hibernaculum are not or only slightly connected with the hibernaculum. P.
alpina usually does not produce gemmae at all and if it exceptionally does,
the gemma remains connected with the hibernaculum by a brownish-yellowish
root branch.
Kind regards Juerg
___________________________________________________
Juerg Steiger, Institut fuer Aus-, Weiter- und Fortbildung IAWF
University of Bern, Inselspital 37a, CH-3010 Bern, Switzerland
Office: +41 31 632 9887 Fax: +41 31 632 9871
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