206 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 
Additions and Corrections. 
After most of the manuscript of this monograph had gone through the press, Mr. 
Greenman, of the Gray Herbarium, kindly submitted to me some Mexican Potentillae 
for determination. One of these happens to be undescribed; as it could not be printed 
in its proper place, I append it here. 
Potentilla Oaxacana. 
Perennial from a stout tap-root ; stem 4—5 dm. high, rather densely pilose, ascending, few-leaved. 
Basal leaves not very thick, rather densely pilose, less so on the upper surface ; petioles 5-7 em. long, 
striate, silky-villous ; leaflets 5, broadly obovate, coarsely crenate, about 5 cm. long, strongly veined ; 
stem leaves smaller, with 3 leaflets, the lower short-petioled, the uppermost sessile. Lower stipules 
lanceolate, more or less scarious, the upper broadly ovate, herbaceous, and often toothed. Cyme 
rather open. Flowers about 15 mm. in diameter. Hypanthium pilose ; bractlets oblong, nearly equal- 
ling the ovate sepals. Petals yellow, obovate, exceeding the sepals by fully one-half. Stamens 20-25, 
It belongs to the gracilis group, and is intermediate between P. fastigiata, P. subcoriacea and P. 
staminea. It most resembles the first in the form and the pubescence of the leaves, but is a larger 
plant, with more open cyme, larger flowers and denser pubescence. — P. subcoriacea is easily distinguished 
from it by its dark green, shining subcoriaceous leaves, and P. staminea by the tomentum and the 
greater number of stamens. 
Mexico, State of Oaxaca (Cuatro Venados, alt. 8500 ft.) : Rey. L. C. Smith, No. 47, 1894. 
On pp. 1, 10 and 19, Dasiphora should be substituted for Comocarpa. I adopted Torrey & Gray's 
subgeneric name for the genus whose type is Potentilla fruticosa L., not knowing that the genus had 
been named Dasiphora by Rafinesque in his Autikon. I am indebted to Professor Greene, of the 
Catholic University, Washington, for information concerning this name, as no reference to Dasiphora 
is found either in the Kew Index or in the Nomenclators of Steudel and Pfeifer. 
On p. 28, read P. longipedunculata instead of P. longipes. 
On p. 40, add to the list of specimens under P. heterosepala Mexicana: C. G. Pringle, No. 5693, 
1894 (unusually large specimens from the State of Oaxaca). 
On p. 62, add to the list of specimens under P. Ranunculus Lange : 
Labrador (Cape Chudley) : J. D. Sornborger, No. 24, 1896. 
This species is therefore to be added to those growing on the North American continent. 
On Plate 28 read Potentilla ctenophora instead of var. ctenophora. 
On Plate 101 read Dasiphora fruticosa instead of Comocarpa Jruticosa. 
