391 
of the line of the extreme southwestern limit of Gray’s Man. 6th 
Ed. About 175 species of Phanerogams and Pteridophytes were 
collected, about 60 of them new to Messrs. Sheldon and Carleton’s 
list, most of these, however, the commoner plants, and 12 of 
which are not reported in Gray’s Manual. Of these 12, 3 are not 
included in Dr. Coulter’s Martual of the Texas Flora, nor 8 of 
them in his Botany of the Rocky Mountain region. 
These 12 plants are Zalinum calycinum Engelm., found abund- 
antly on the red sandstone rocks outcroping in ravines and along 
the Cimarron River; Desmanthus Jamesti T. & G., very abundant 
on dry prairies; Galactia mollis Michx., in sand along the river 
banks; Acacia Jiliculoides (Cav.) Trel., abundant in the sandy 
woods; Gaura villosa Torr., showing gradations into forms ; 
Sesuvium Portulacastrum L., in sand along the saline banks of 
the river; Crnoscitadium pinnatum DC., but one plant collected 
by a roadside; Aster patens Ait. var. gracilis Hook., the va- 
riety not in Gray’s Manual, very abundant in rich sandy ground 
Near the river; Baccharis glutinosa Pers., the fertile plant conspic- 
Yous by its very long and white pappus along the sandy river 
banks ; Lriogonum longifolium Nutt., on dry prairies; Aphanoste- 
phus ramosissimus DC., found in abundance in the sand of rich 
river bottoms; Cooperia Drummondii Herb., near Stillwater on rich 
Prairies. 
The flora of Oklahoma is very similar to that of southern 
Kansas. The climatic and geologic conditions are very similar in 
both regions, and this fact, combined with the fact of the prox- 
imity of the Cimarron and Arkansas rivers flowing southward 
_ through the territory from Kansas, tends to make the floras alike. 
Outcropping “red-beds” (whence probably the name Oklahoma— 
“home of the red earth”) occur in both regions associated gener- 
ally with a very sandy soil. Rich, sandy land, well timbered, oc- 
curs along the rivers and creeks, while back some distance on the 
uplands, prairies supplant the forests. The farther west one goes, 
the observer can readily notice the dwarfing of the trees as the 
Tegions of less rainfall are passed through, and many plants show 
Stadation into dwarfed forms. Most of the plants of this whole 
: district, moreover, present the characteristics of the plants of dry 
Sterile regions, viz., thickened leaves and epidermis, sunken sto- 
