474 
careful field observations, morphological characters separating the 
form from related species, and the fact that the plant is very 
common in Walter’s region, furnish pretty strong evidence in favor 
of its correct identification. So other cases might be cited. The 
geographic ranges of many species as given are too restricted, as 
a few appended examples will show, and no data bearing on alti- 
tudinal distribution are furnished. 
Clematis Viorna. Common east of the mountains as far south 
as middle Georgia. 
Clematis Addisonii. Also in the Cumberland Mountains, 
Tennessee. 
Clematis Douglasit Scotti. Also in Montana and Dakota. 
Clematis verticillata. Occurs in southwestern Virginia. 
Clematis alpina tenuiloba. Also in Colorado. 
Thalictrum cortaceum, Also in the Cumberland Mountains, 
Tennessee. 
Myosurus minimus. Occurs in southeastern Virginia. 
Ranunculus recurvatus. Also in Montana. 
Ranunculus abortivus micranthus. Common south to south- 
ern Pennsylvania. 
Ranunculus septentrionalis. West to Nebraska. 
Caltha palustris. Also west to Nebraska. 
Aconitum Columbianum. East to the Black Hills, South 
Dakota. 
Cimicifuga racemosa cordifoha. Occurs in the mountains of 
Virginia. 
_ Xanthorrhiza apiifolia. Ranges east of the mountains and as — 
far south as middle Georgia. 
Delphinium tricorne. Occurs as far west as Nebraska. 
Delphinium exaltatum. Also west to Nebraska. 
Magnolia tripetala. Grows as far south as middle Georgia. 
Asimina triloba. Occurs east to New Jersey and west to 
Nebraska. 
Asimina angustifolia. Rather common as far north as middle 
Georgia. foe 
Brasenia Schreberi. Also south to Georgia and Florida. 
_Menispermum Canadense. Occurs west to Nebraska. 
Berberis repens. Ranges east to the Black Hills, South Dakota. 
