[Vor. 3 
356 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
of North Fork on the east and of Spring River on the south. 
Seepage springs and small, sluggish streams give a wet and 
somewhat swampy character to some portions. The soil is, 
for the most part, a sandy loam, with large blocks of sand- 
stone on the surface of some of the higher hills and sand- 
stone and shale outeropping along streams. Peculiar to this 
area, so far as has been observed within the county, are 
Andropogon ternarius, Panicum scoparium, Setaria imberbis, 
Festuca Shortti, Eleocharis ovata, Rynchospora cymosa, 
Scleria ciliata, Scirpus carinatus, Carex arkansana, Juncus 
monostichus, J. effusus, J. polycephalus, J. robustus, Poly- 
допит sagittatum, Froelichia gracilis, Geocarpon minimum, 
Ranunculus oblongifolius, Rhexia latifolia, Proserpinaca 
palustris, Centunculus minimus, Chrysopsis pilosa, and Cir- 
sium discolor. Other species, more or less characteristic of 
this region but which have also been found elsewhere in the 
county, are Quercus palustris, Cyperus esculentus, Fimbris- 
tylis castanea, var. puberula, Rynchospora glomerata, Scleria 
triglomerata, Carex umbellata, C. stipata, Luzula campestris, 
var. bulbosa, Polygonum tenue, Anemone caroliniana, Poly- 
gala sanguinea, P. incarnata, Crotonopsis linearis, Viola 
pedata, var. lineariloba, V. sagittata, Monarda mollis, Linaria 
canadensis, Castilleja coccinea, and Marshallia caespitosa. 
Of the above list, Froelichia gracilis and Chrysopsis pilosa 
have only been found on an isolated sandstone hill at the 
state line, near Smithfield, and Scirpus carinatus in lower 
ground near the same place. 
A region of much more limited extent, but with a distinet 
flora, is situated in the valley of Turkey Creek, two miles 
B EN of Joplin, where the Grand Falls chert of the 
Mississippian series outcrops. The surface of the chert is 
irregular, with hummocks and basin-like depressions of va- 
rious sizes. Many of the latter contain thin layers of soil 
washed from the higher ground and in wet times are filled 
with rain-water, which, since the rock where unfractured is 
impermeable, is retained until evaporated by the sun. The 
superabundanee of moisture in rainy seasons and extreme 
