Ф 
19161 
PALMER—PLANTS ОЕ JASPER COUNTY, MISSOURI 857 
dryness at other times, together with an almost total absence 
oÍ shade, the sparsity of soil and other ecological factors, 
produces peculiar conditions clearly reflected in the flora, 
which is partly hydrophytie but mainly xerophytie and suc- 
culent. Some of the characteristic species are Cheilanthes 
lanosa, Selaginella rupestris, Leptochloa fascicularis, Cy- 
perus aristatus, Digitaria filiformis, Aristida basiramea, Al- 
lium mutabile, Polygonum tenue, Talinum parviflorum, T. 
calycinum, Portulaca pilosa, Selenia aurea, Sedum Nuttal- 
lianum, S. pulchellum, Lathyrus pusillus, Crotonopsis line- 
aris, Opuntia macrorhiza, Spermolepis echinata, Linaria 
canadensis, Specularia leptocarpa, Coreopsis tinctoria, and 
Krigia occidentalis. The chert formation is much more ex- 
tensively exposed a few miles to the south along Shoal Creek 
in Newton County, where all of the above and several other 
peculiar species are found. 
Somewhat similar, though quite distinct, are the limestone 
barrens found at several places in the county, where horizon- 
tal strata of the Mississippian series appear on the surface. 
All of these are of quite limited extent but support a charac- 
teristic flora. Some of the best-marked localities are the fol- 
lowing: one mile north of Jasper, on south side of Coon 
Creek; two miles southwest of Neck City, along a small 
branch; one mile north of Carterville, on south side of Center 
Creek and along a branch south and east of Carterville and 
Webb City. Typical plants of these limestone barrens are 
Ophioglossum Engelmann, Sporobolus pilosus, Sphenopholis 
obtusata, Bouteloua curtipendula, Cyperus aristatus, Camas- 
sia esculenta, Oxybaphus albidus, Arenaria patula, Talinum 
calycimum, Portulaca pilosa, Draba cuneifolia, Corydalis 
montana, Sedum pulchellum, Acalypha gracilens, Tragia 
ramosa, Euphorbia missouriensis, Malvastrum angustum, 
Mentzelia oligosperma, Opuntia humifusa, Chaerophyllum 
texanum, Heliotropium tenellum, Isanthus brachiatus, Galium 
virgatum, Aster oblongifolius, var. rigidulus, and Artemisia 
mewicana. 
e Palmer, E. J. Flora of the Grand Falls chert barrens. Acad. Sci. 
St. Es Trans. 19:97-112. 1910. 
