The Ohio ^J^aturalist, 



PUBLISHED BY "** 



The Biological Club of the Ohio State Uni'versity, 

 Volume VI. NOVEMBER, 1905. No. 1. 



TABLE OF CONTENTS 



SuKFAi-E— ('(iiitriliution to the Life History of Saugiiiiiaria Caniulcnsis 379 



ScHAFi'NER— The Cla^sihoatioii of Plants, II 386 



IIiNE— New Species of North Ainericau Clirvfops 391 



Riddle— Briisl) Lake Protozoa 394 



Fischer— An Abnormal Cone of Pinus Laricio 396 



Gleasox— Notes from the Ohio State Herbariinn. IV 397 



News an<l Notes 399 



Sfi'.KACE— Meetinii of the Bioloiiieal ( liil) JOO 



CONTRIBUTION TO THE LIFE HISTORY OF SANGUINARIA 



CANADENSIS.* 



Fraxi; AL 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 paper 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 1905 young capsules w^ere taken at inter- 

 vals of al)Out 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 

 vounger 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 



* Ciintributions from the Botanical Laboratory of the Oiiio State Universitx', XXI. 



