| Popis: |
In connection with field work in northern Florida, undertaken to determine the composition and limits of certain gulf coast forest associations and their relations in succession, and following the instructions of LIVINGSTON,' FULLER,2 and the work of others in the north and west, records of the daily rate of evaporation in several of the typical plant associations were kept, some of them running through a period of i9 successive months. The Livingston rain-correcting atmometers were used and care was taken to follow the directions for their operation in all particulars. It was planned to visit each station once in two weeks, and this was carried out with few interruptions. Station no. i was in an upland hammock forest on Norfolk Fine Sandy Loam. Magnolia grandiflora, Fagus grandifolia caroliniana, and Acer floridanum Pax (or Acer saccharumfloridanum Sarg. Silva N. Am.) were the chief trees, with an undisturbed growth of young trees of these and other species and of mesophytic shrubs and herbs. The apparatus at this station suff ered various mishaps, and the record is broken, but from January to May I913, which includes the times of extreme minimum to maximum evaporation for all the stations (except that of Pinus palustris), the record is complete. Station no. 2 was in an upland oak forest on Orangeburg Fine Sandy Loam, 2 .5 miles west of Tallahassee. In this forest ninetenths of the trees were deciduous, with Quercus falcata, Q. stellata, and Carya alba predominating. Cornus florida was common, but Q. virginiana and flex opaca (broad-leaved evergreens) were rare. Myrica cerifera, Rhus copallina, flex vomitoria, Ceanothus americanus, Aralia spinosa, Vaccinium stamineum, Callicarpa americana |
