230 



nigra, especially in the portions of the river farthest from its 

 rhouth, where the tendency to meandering is greatest, was almost 

 confined to the inside of bends, where deposition of sediment is 

 taking place most of the time. Nyssa biflora, which is very com- 

 mon in the estuarine swamps near the mouth of the river,* was 

 not seen at all on the banks, perhaps because the water there 

 is a little too swift or too muddy for it. 



In dividing the notes at only one point in this way there is 

 nothing to show the reader just where each species was first and 

 last seen. But of the species in the first column, Nyssa uniflora, 

 Planera, Quercus lyrata, Popiilus deltoides, and Betula have not 

 been observed in the typical estuarine swamps, and were not 

 seen until after passing through the railroad bridge about four 

 miles above Apalachicola. Of those in the second column, 

 Nyssa Ogeche, Populus heterophylla, Magnolia glatica, Sahal 

 Palmetto, and Zizania are not found in the alluvial swamps above 

 Bristol,! and perhaps do not grow on the banks of the river 

 anywhere above the point where darkness put an end to my 

 observations, which must be about thirty miles below Bristol. 



Sahal Palmetto extends sparingly up the river to a little above 

 the mouth of the Chipola, far enough to overlap Platanus, 

 Betula, Planera, Populus heterophylla, Arundinaria, Wistaria, 

 and Brunnichia. (There is probably no other place in the 

 world where it associates with all these alluvial swamp plants, 

 or even half of them.) Magnolia glauca as a river-swamp tree 

 extends at least five miles above the mouth of the Chipola, but 

 apparently not far enough to meet Acer saccharinum, which was 

 not seen until about sunset. Nyssa Ogeche extends a little 

 farther up, meeting Acer saccharinum about fifty miles from the 

 coast, and probably nowhere else. 



Planera, Betula, and Populus deltoides were first noticed about 

 fifteen miles above Apalachicola, and Popidus heterophylla, 

 Platanus, Quercus nigra, Arundinaria, Wistaria, Vitis, Brun- 

 nichia, and Ampelopsis at about twice that distance. 



Salix nigra, Platanus occidentalis, both species of Popidus, 



* Described in Ann. Rep. Fla. Geol. Surv. 3: 235-237. pi. 19, 2. /. 17. 1911. 

 t Ibid., 234-235. pi. 19, I. 1911. 



