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  Re: [Aroid-l] Fenestratarum culum P.C.Boyce & S.Y.Wong
From: Peter Boyce <phymatarum at gmail.com> on 2015.05.13 at 03:10:22(23335)
Hi Cory,

Streamlined leaf blades are widely associated rheophytism and with aquatic plants - indeed before the term 'rheophytism' was coined by van Steenis, Ridley, who termed it ‘stenophylly’, mentioned the ecological nice and its adaptations in "On the Flora of the Eastern Coast of the Malay Peninsula - [Transactions of the Linnean Society of London. 2nd series, Botany 3(10), 267-408].

By the way, the "wider" leaf blade in the image is an undescribed Aridarum, also a rheophyte, and these blades still classify as narrow.

This is a nice paper dealing with morphological adaptations associated with rheophytism:

http://www.aroid.org/gallery/wong/Rheophytism%20in%20Bornean%20Schismatoglottideae%20-%20%5BSystematic%20Botany%2038%281%29%2032-45%5D%20-%20Wong%202013.pdf

Kind Regards

Peter

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