Sprunt, Susan V , Shaw, Shane , Hickey, R. James .
Anomalous foliar outgrowths in Polypodium polypodioides (L.) Watt.
Laminar abnormalities in ferns are fairly common and may take varied forms such as sporophyll – trophophyll intermediates, excessively branched fertile spikes, or “crested” laminar tissue. Such sports while unusual in appearance are not difficult to interpret anatomically or developmentally. In the course of studies on Polypodium polypodioides, we came across an unusual, bud-like laminar outgrowth. These growths develop on the rachis and distal portions of select pinnae on specimens restricted to several proximate populations in Costa Rica and southern Mexico. These growths are small, densely scaly, and internally hollow. They are distinctive in blending anatomical characteristics of both stem and leaf. A complete discussion of the form and anatomy of these growths will be presented.
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1 - Miami University, Department of Botany, Oxford, Ohio, 45056, USA
Presentation Type: Poster:Posters for Sections
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM