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Re: Fenestratarum culum P.C.Boyce & S.Y.Wong

  • Subject: Re: Fenestratarum culum P.C.Boyce & S.Y.Wong
  • From: Tom Croat <Thomas.Croat@mobot.org>
  • Date: Thu, 14 May 2015 22:11:53 +0000

Dear Jason:  Actually there appear to be several species that at rheophytes. I have always called them Dichranopygium but I could be wrong.

 

Tom

 

From: aroid-l-bounces@www.gizmoworks.com [mailto:aroid-l-bounces@www.gizmoworks.com] On Behalf Of Jason Hernandez
Sent: Wednesday, May 13, 2015 11:31 PM
To: aroid-l@www.gizmoworks.com
Subject: Re: [Aroid-l] Fenestratarum culum P.C.Boyce & S.Y.Wong

 

Speaking of Rheophytes:

I have not yet had the opportunity to look up that key to the Cyclanthaceae (thank you for providing the citation), but one of the reasons I asked was because I remember seeing a rheophytic cyclanth in Ecuador, but was not able to determine, from online sources, what genus it could be. Anyone familiar with this? It was on the Pacific slope, about 10-12 cm in height when full grown, white inflorescences, and grew over emersed rocks with roots trailing in the water.

 

Jason Hernandez

Naturalist-at-Large

 

 

 

Date: Wed, 13 May 2015 11:10:22 +0800
From: Peter Boyce <phymatarum@gmail.com>
Subject: Re: [Aroid-l] Fenestratarum culum P.C.Boyce & S.Y.Wong
To: Discussion of aroids <aroid-l@www.gizmoworks.com>
Message-ID:
    <CAFiaZ4OMKECKFp8g_xzabEhViNWdrQ0gjznaePKgDhzL0LYN9w@mail.gmail.com" id="yui_3_16_0_1_1431576183739_20263">CAFiaZ4OMKECKFp8g_xzabEhViNWdrQ0gjznaePKgDhzL0LYN9w@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

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

On 12 May 2015 at 03:44, Corey W <cewickliffe@gmail.com> wrote:

> I find the long, thin shape of the leaves reminiscent of some of the
> Cryptocorynes that are found in faster flowing water, is this also the case
> for this plant? I would guess to reduce drag and not have the plant ripped
> from it's spot in fast flow (compared to the wider leaved plant in the
> habitat photos, that may find itself taking a trip downstream!).
>
> Best, Corey

 

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