Passiflora caerulea & Passiflora poslae

Image © 2009 Yero R. Kuethe
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Passiflora poslae
(Passiflora)
Madre de Dios/Tambopata Peru 1990 An
extraordinary plant with what appears to be butterfly egg mimicry at the leaf
ends. Collected by P. Núñez in 1990 and named by Vanderplank & Boender in
Curtis's Botanical Magazine, Volume 25, Number 3, August 2008 , pp. 237-244(8).
Neil Gale of the Magic of
Life Butterfly House comments:-
''Yes it is an egg mimic this species and in terms of evolution one of the most
interesting plants to come out of South America recently, although there are
other examples. Most Heliconiine eggs are yellow, hence the colour of the mimic
plant eggs. The fact that they are on leaf tip (modified hydathodes??) could
mean that it is targeting a particular butterfly. Different species of Longwings
lay on different parts of the vine e.g. shoot tips, tendrils, older leaves. It
would be interesting to see what is the commonest species of Longwing out in its
local habitat. At a guess, it would be the Small Postman (Heliconius erato) that
lays relatively large eggs right on the shoot tips. The Zebra - H. charithonia -
also lays on tips but has smaller eggs in tighter clusters. I should say that in
the display it gets plastered with eggs of many longwing species. The mimicry
defence breaks down here due to butterflies being confined to a small space.''
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