216 FLORIDA GEOLOGICAL SURVEY-I3TH ANNUAL REPORT

Orange Lake with black waxy soil but no visible outcrops of lime.stone might also be classed here. The trees in such' places are mostly deciduous, and some o.f them are listed under the illustration. Ferns of various kinds abound on the shaded rocks, and a few herbs of the nettle family, such as Urtica chaniaedrvoides and Parietaria, are quite characteristic.
 The soil of the calcareous high hammocks is very good for farming, but some of it is too rocky, and the expense of clearing is quite an item, too. In fields and orange groves cleared from this type (and also from low hammocks) scattered cabbage palmetto trees are a common and picturesque sight (fig. 14). They probably come up from seeds dropped by birds, and are allowed to remain for the sake of appearances and because they cast little shade and do not take much from the soil.
 The tropical hammocks described-on an earlier page-might also be treated as calcareous hammocks, but they have been put in a different category on account of the small size of the trees.
 Sweet gun woods. This is not a very distinct type, but :s noteworthy on account of its strong resemblance to some forests several









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 Fig. 41. Red oak woods with some sweet gum, on reddish strongly phos.phatic soil about a mile and a half east-southeast of Ocala, Marion County. Feb. 13, 1915.