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  Re: [Aroid-l] Cataphill
From: Peter Boyce <phymatarum at gmail.com> on 2016.10.24 at 00:38:39(23695)

The answer the latter part of your email first. The petiole comprises the sheathing part and the non-sheathing part. The ontogeny of a cataphyll is that it is (mostly) composed only of the sheathing part of the petiole. The remainder of the petiole, and indeed the blade, most of the time represented by a thickened tip to the cataphyll.

Returning to the first part of your email, the peduncle will have a cataphyll (and usually a prophyll) associated with it, but not attached to the peduncle. Instead the cataphyll will be part of the preceding shoot (module or article depending on who's terminology is favoured).

Indeed, the cataphyll (and prophyll) are protective.

Kind Regards




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