‘ CONTENTS 
BRAINERD, Ezra. Further notes on the stemleéss violets of the South 
plate 1) - he eae - - - - - - - - 
RYDBERG, PER AXEL. Studies on the Rocky Mountain flora—XXV- eee 
ALLARD, H, A. Some common species of Nicwer eal at peers s Mills, 
Georgia - 25 
WituiAMs, R.S. Panama mosses - - - - 33 
PRETZ, HaroLp W. Flora of Lehigh chuate Pcaniyienia - - - 45 
RYDBERG, PER AXEL. Notes on Rosaceae—V - 
WEsTER, P. i Contributions to the spl and bibliography of = 
roselle 9 
BICKNELL, Suse P. The ferns and esi ora of cot a 103 
PENNINGTON, L. H. Upon assimilation of atmospheric nitrogen bed 3 - 135 
MACKENSEN, BERNARD. Two new species of Opuntia = - - I41 
Russy, H. H. Two new species of edible fruits from Mexico - . - 145 
BENEDICT, RALPH Curtiss. The genera of the fern tribe Vittarieae: 
their external morphology, venation, and relationships (plates 2-8) - 153 
BRAINERD, Ezra. The caulescent violets of the southeastern United 
States - . - 191 
Evans, ALEXANDER Ww. “The Hepaticae of the dhe foliiicts “(lates 
9g, 10) - 205 
HARPER, eco M. Early spring aspects of thse selek: aie vegetation 
of South Carolina, Georgia, and northeastern Florida - - 223 
SotH, BLANCHE. List of plants collected above timber line on Pikes Peak, 
with altitudinal extensions and notes - - - - - - - 237 
EcGLEsTon, W. W. New Crataegi of the northeastern manual range - 243 
Evans, ALEXANDER WILLIAM. se smeie of Puerto Rico—X “ ‘i, 
12) - - 251 
a, . HEBER, fe List of lichens collected in the Yukon region by 
R.S. Williams - . - 287 
en Percy. Notes on Rutaceae—V - - 295 
AnpreEws, F. M. Conjugation of two diteroht species of Spi irogyra - 299 
eee MARGARET APPLETON. On the anomalous splitting a the 
rhizome and root of Delphinium scaposum (plates 13, 14) - - - 307 
LAMSON-SCRIBNER, F. Notes on certain species of Muhlenbergia = - - 319 
HANNIBAL, Harotp. A Pliocene flora from the Coast ropaees of California 
(plate 15) - - - 
BartLett, H. H. A supplemental description of "Euphorbia epee 
morpha- - . - 343 
peel 
