Results of a short‐term study of the revegetation of illegally rock‐plowed wetlands in the East Everglades are reported. Comparisons of the plant communities on a restored site, an unrestored site, and the natural control areas directly adjacent to these sites were made using line intercept transects. On the site where removal of the rock‐plowed material and grading of the surface to below original elevation were required for restoration, less than 20% of plant cover was of nonwetland species, and the occurrence of exotic species was low. On the rock‐plowed site where no restoration efforts were performed, 61% of plant cover was of nonwetland species, and there was a higher occurrence of exotic species compared to the restored rock‐plowed and the control sites.
The number of developing leaves was compared to the number of mature expanded leaves in the crowns of 42 species of palms representing 28 genera. One species had fewer developing vs. mature leaves. Ten species had approximately the same number of developing and mature leaves. Eighteen species had approximately 1.5 times the number of developing leaves vs. mature leaves. Eleven species had approximately twice as many developing leaves vs, mature leaves. Two species (Copernicia gigas and Gastrococos crispa) had approximately three times the number of developing vs. mature leaves. Additional data from the literature and previously unpublished observations for 19 species are also presented. The I: I ratio between the number of developing leaves vs. mature leaves, as hypothesized by earlier authors, was not found in most species of palms. Corner (1966) hypothesized that the number of developing, unexposed leaves in palms was equal to the number of mature, exposed leaves in the palm crown. Corner's dissections of six species of arecoid palms supported this hypothesis of a 1:1 ratio. He derived a simple method for age determination of mature palms based upon the number of leaves in the crown, the number of leaf scars on the trunk, and the time between opening of successive leaves. This model assumed a I: I ratio of developing to mature leaves, a constant rate of leaf expansion, and a constant number of leaves in the crown once the palm was mature. However, Tomlinson (1990) questioned the applicability of this model for all palms. Earlier work on Phoenix dactyli/era L.
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