On what basis must the 'primeval' leaf be linear? Some of the most complex leaves of extant plants are those of fern and fern-allies, the lineages of which well-predate "modern" families as the aroids.
I urge everyone to read: Hay & Mabberly (1991). Transference of function and the origins of the aroids - Botanische Jahrbücher für Systematik 113(23), 339-428]. I can send the pdf to anyone unable access it on-line.
On 28 February 2012 01:11, Jason Hernandez <email@example.com>
The difficulty I have with the "tropical storms" idea is that some fenestrated Monstera spp. occur in regions not subject to tropical storms, e.g. the premontane cloud forest of the Pacific coast of Ecuador. I will let growers address the matter of whether scandent Monstera with fenestrated leaves are any easier to pull away from the substrate than, say, scandent Philodendron with entire leaves.
I am not sure what you mean by "created." We may suppose that the primeval leaf was linear, like the branches of Equisetum or the needles of a conifer (think also of Lycopodium and Araucaria), and that the next evolutionary step was a broadening, so as to capture more sun. All the variations in leaves we see are developments in response to the requirements of different niches. The juvenile-stage leaves of a Monstera probably approximate the ancestral leaves, in parallel with the way various organisms' embryonic development hints at their evolutionary stages.
Date: Sun, 26 Feb 2012 18:16:47 -0800 (PST)
From: "E.Vincent Morano" <firstname.lastname@example.org
Subject: Re: [Aroid-l] Holes
To: Discussion of aroids <email@example.com
Content-Type: text/plain; charset="iso-8859-1"
If these are tropical plants then perhaps is is so they dont get destroyed in tropical storms. If the plants have a weak root system and coulds easily bee uprooted then I think this is the likely reason. But now another question arises; Were they created like this or were the leaves full and somewhere along they line developed holes in them to adapt?
] On Behalf Of John
Sent: Friday, February 24, 2012
To: ' Discussion of aroids '
Subject: [Aroid-l] Holes
Can anyone say what
might be the biological purpose of leaves with holes in them?? A typical
example would be Monstera deliciosa.
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