K 
Gulf Pine Barren-Strand District. 453 
tica, Liguidambar, Fagus, Hicoria ovata and minima all draped with 73llandsia 
usneoides are prominent. With the rise of land above the action of occasional 
overflows are found Ziriodendron, Tilia americana, Celtis occidentalis, Persea 
en together with Ouercus dreviloba, Carya olivaeformis (= FE ‚pecan) 
d C. myristicaeformis. Trees of smaller size occur here: Asimina, Cercis, 
on caroliniana, Laurus benzoin and many lianes (Vitis aestivalis, V. 
cinerea, V. rotundifolia, Berchemia, Bignonia crucigera, Ampelopsis, Tecoma, 
Smilax, 3 spec., Brunnichia cirrhosa, Aristolochia tomentosa, Calycocarpum 
Lyoni, Schizandra coccinea). 
Cedar Hammock Formation (Funiperus virginiana). On the highest swells 
of the plain where the strata of rotten limestone are overlaid by lighter loams 
poorer in humus, deep and perfect drainage forests prevail of a mixed tree 
growth. Fraxrinus americana, Quercus laurifolia, Q.texana, Celtis mississippiensis, 
Ulmus americana, Funiperus virginiana. Originally Funiperus virginiana forms 
about 30 per cent of the timber growth. The Edwards Plateau in Texas is 
covered with dense growths of this Juniper called cedar brakes. The trees 
stand thickly and the forest is so dense as to be penetrable only with extreme 
difficulty. The most extensive of these areas are those of the Colorado River 
from Austin to the San Saba country. 
Treeless Prairie Formation. The lower eminences of the plain with the 
strata of limestone near the surface and destitute of trees are named in Ala- 
bama “bald prairies”. These bald prairies can be regarded as the true home 
of the original campestrian flora, which is peculiar to a calcareous soil 
rich in humus and with a sunny exposure. Many of its types are common 
to the prevalent associations on the grassy timberless plains of eastern North 
America. 
The following grasses are common: in the open prairie: Paspalum laeve, P. distichum, Panicum 
flexile, P. autumnale, Andropogon furcatus, Bouteloua curtipendula, Eragrostis capillaris, E. refracta, 
E. Purshii, Poa compressa, euren vir: . Associated with the grasses are: Hypericum sphaero- 
carpum, Petalostemon candidus, P. purpureus, Cassia multipinnata, Se em mariana, Linum sul- 
catum, Gaura Michauxü, DEREN Be As Perser viridis, Eupatorium altissimum, E. sero- 
tinum, Silphium lacinia‘ S. scaberrimum, S. trifoliatum, Rudbeckia triloba, Heilintins Kine 
tum, 
H. divaricatus, Coreopsis lanceolata, Lepachys Pass Wolyzalk Boykinii, Gaillardia pulchella, 
Monarda citriodora. 
The co dast prairie of zexss; according to BRAY, is so low and flat une where the rainfall 
es and wet-soil annuals constitute the vegetation of ke coast ae, whose vegetation is 
sine with that of certain prairies that extend through Alabama to Florida and South Carolina 
previously noted. The grasses are species of the genera Paspalum, Panicum, Andropogon, Era- 
angustifolium, Hymenocallis occidentalis, Ranunculus trachyspermus and muricatus, Baptisia laevi- 
caulis, B. sphaerocarpa, Oenothera sinuata etc. 
D. Arkansas-Louisiana District. 
This district floristically speaking possesses many of the plants found along 
the Gulf coast, but the absence of the longleaf pine, Pinus palustris, 
