124 FLORIDA GEOLOGICAL SURVEY-13TH ANNUAL REPORT an estimate of its area, for the region has scarcely been touched by soil surveys yet.* In Marion County, northeast of Silver Springs, are some clayey flatwoods, of unknown extent, which probably belong to this region. The occurrence of marl and peat in low places has been mentioned above under the head of geology. Some of the low hammocks seem to contain gypsum deposits, as in the Gulf hammock region. Vcgctation. The prevailing vegetation type on the uplands is high pine land, very similar to that in the lime-sink region. (Fig. 19, though intended for a different purpose, shows it pretty well). Scrub (fig. 38) occurs in'all sorts of situations topographically; usually not far from lakes, but often on uplands remote from any body of water. The level flatwoods bear the vegetation characteristic of such places, and peat prairies and saw-grass marshes border the larger lakes or completely fill small basins. Sahdv shores of lakes have quite a characteristic growth of sedges and other con.paratively small and wiry plants (as do similar places in New England), merging gradually into that of peat prairies in many places. Peninsulas jutting out into lakes are commonly occupied by sandy hammocks, and marly low places by low hammocks, much like those in the Gulf hammock region. Small and non-calcareous streams are usually bordered by non-alluvial swamps or bays, containing a large portion of evergreens. The commonest plants in the lake region seem to be as follows: COMMONEST PLANTS OF LAKE REGION. TIMBER TREES Pinus palustris Long-leaf pine Uplands Sabal Palmetto Cabbage palmetto Low hammocks Pinus Caribaea Slash pine Flatwoods, etc. Pinus clausa Snruce pine Scrub Pinus serotina Black pine' Low pine land Taxodium distichum Cypress Swamps Pinus Elliottii Slash pine Bays, etc. Taxodium imbricarium (Pond) cypress Around lakes and ponds Liquidambar Stvraciflua Sweet gum Tow hammocks, etc. Magnolia grandiflora Magnolia Hammocks Acer rubrum Ped Maple Swamps Pinus Taeda Short-leaf pine Low hammocks, etc. Gordonia Lasianthus Swamps and bays Ouercus Virginiana Live oak Hammocks Quercus nigra Water oak Low hammocks, etc. Nyssa biflora Black gum Swamps and ponds Ouercus laurifolia Sandy hammocks Hicoria glabra? Hickory Sandy hammocks *The National Forest in eastern Marion County is said to be mostly scrub.