4 



— 



3-4 



white 



4-8 



white 



7-9 



yellow 



5-6 



— 



o 



o 



6-7 



— 



5-7 



pinkisl 



4 



— 



5-6 



— 



7-8 







6-9 



white 



4 



— 



82 HARPER 



2 Carex sp.lj. 



i Eriocaulon compressumlf 

 *i Castalia odoratal| 



i Xyris fimbriata T| 

 *i Scirpus cylindricus1|. 



i Anchistea Virginica % 



i Gratiola ramosa 



i Sclerolepis unifloral/. 



i Carex alata1| 

 *i Eleocharis interstinctal/- 

 *i Ludwigia sphaerocarpalj. 



i Dulichium arundinaceuml/. 

 *i Limnanthemum aquaticuml/. 



i Carex venustal^ 



i Sphagnum macrophyllum 



Summary. There is little noteworthy about these plants 

 except their ranges. All of them except Nyssa Ogeche grow in 

 many places in the adjacent Lower Oligocene region, but nearly 

 a third of the species (the names of which are starred) are not 

 known to be native elsewhere in the Altamaha Grit region 

 (doubtless because they require permanent water) , though some 

 •of these grow also in artificial ponds and ditches. At least a 

 dozen range northward to the glaciated region, where they 

 usually occupy similar habitats. 1 Five or six are reported also 

 from the tropics, but their identity or indigeneity there may 

 in some cases be questioned. 



i2. Sand-Hills. 



Most of the habitats hitherto discussed may be considered as 

 located on the right-hand side of some creek or river. If we cross 

 the stream we find quite a different series of habitats, of which 

 the sand-hills are the type. (Plate X, fig. 2, and Plate XI.) 

 Sand-hills have been described on an earlier page (21). Their 

 most prominent characteristic is the sparsity of vegetation, and 

 consequent lack of shade and humus, together with conspicu- 

 ous adaptations for reducing transpiration in most of the plants. 2 



1 See Rhodora, 7: 76. April, 1905. 



2 For references to anatomical or morphological notes on Chrysoma 

 pauciflosculosa, Galium hispidulum, Asclepias humistrata, A. verticillata, 

 Batodendron arboreum, Lupinus perennis, Baptisia perfoliata, Dendro- 

 pogon usneoides, Cyperus retrofractus , and Pinus palustris see the cata- 

 logue of species. 



