Re: Utrics ID

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Date:          Wed, 26 Apr 2000 15:28:53 
From: SCHLAUER@chemie.uni-wuerzburg.de
To: cp@opus.hpl.hp.com
Message-Id: <aabcdefg1280$foo@default>
Subject:       Re: Utrics ID

Dear Filippo,

> Does anybody know how to distinguish U. stygia from U. ochroleuca?

You will need at least one trap (there are also differences in the
flowers but I quess you have sterile material) and a microscope. Look
at the quadrifid hairs inside the trap (ideally you should
investigate as many of them as you can because there is some
variation depending on the respective position of the hairs). If the
four arms are spreading from the point of attachment in two equal
pairs like the arms of the letter "X", you have _U. stygia_. If two
arms are longer, with the angle between them smaller than between the
two remaining, shorter arms, you have _U. ochroleuca_. If the arms of
each pair are more or less parallel to each other, you have _U.
intermedia_.

Kind regards
Jan

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