| | COSTA RICA: Puntarenas:: Coto Brus cultivated; Wilson Botanical Garden 1200 m, 2004. |
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The pulvinus is the swollen thickening, in this case at the base of the costa, where it joins the rachis. It does not have a reversible reflexing action (raising and lower the pinnae) as do the true pulvinae of legumes. Note also the whitish, longitudinally elongated areas along the rachis. Each one has a white pore in the center of it. These whitish elongated areas are for gas exchange (see paper by Holttum's paper (Kew Bulletin, 1978) on A. evecta).
| | Copyright © 2004 by Robbin Moran
(contact: kcn2[at]cornell.edu)
[ref. DOL6940]
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