NOV 21 1905 
The Ohio ^JS^aturalist, 
PUBLISHED BY 
The Biological Club of the Ohio State Unmersity. 
-l8h 
NEVv 
EOT A 
QArs. 
Volume VI. NOVEMBER, 1905. 
No. 1. 
TABLE OF CONTENTS 
^Sri:FA< B— Contributioii to the Life History of f^ang-uiiiaria Canailensis 37ii 
ScHAFFNER— Tlie Cla“sl tieatioii of Plants, II 38l> 
IIiXE — No\v Species of North American Cliry'o]is 391 
Kidoi.e— Brush Lake I’rotozoa 394 
Fischer — An .Vhnornial Cone of Finns Larieio 3l>6 
(ILEASOX— Notes from the Ohio State Herbarium. IV :;97 
News ami Notes :!9li 
•SCRFACK — McetiiiRof the Biolo.eical I 'lull 400 
CONTRIBUTION TO THE LIFE HISTORY OF SANGUINARIA 
CANADENSIS.* 
Fra.nic ^I. Surface. 
Sanguinaria is a monotypic genus of the Eastern United 
States belonging to the family Papaveraceae. Apparently no 
very great amount of morphological work has been done on the 
members of this family. Shaw (3) in a recent paper gives some 
observations on certain Papaveraceae among which is Sanguin- 
aria. Some of the conclusions in the following ]3aper do not agree 
with his. This may possibly be due to a difference in climatic 
conditions between the two stations where material was col- 
lected, although Shaw does not state definitely, the locality from 
which his material came. 
The following study of the development of Sanguinaria 
canadensis L. was begun in April, 1904. Material was collected 
at intervals of about one week until the middle of June when 
the seeds were mature and had fallen to the ground. In the fall 
material was collected in October, November and December, 
while in the Spring of lOO.a young capsules were taken at inter- 
vals of about two weeks from March 1st to the middle of April. 
The material was killed and fixed in chromo-acetic acid, 
passed through the alcohols and imbedded in paraffin. Sections 
were cut on a rotary microtome 10--12 microns thick. In the 
younger stages the entire ovulary was cut, either transversely or 
longitudinally but in the older stages the individual ovules were 
sectioned. The orientation of the ovule was not difficult owing 
* Contributions from the Botanical Laboratory of the Ohio State University. XXL 
