h 



MEMOIRS 



OF THE 



TORREY BOTANICAL CLUB 



Vol. II. 



No. 3. 



CONTRIBUTIONS TO THE KNOWLEDGE OF THE 



GERMINATION OF SOME NORTH 



AMERICAN PLANTS. 



Bv Theodor Holm. 



(Plates V. XIX.) 



The present paper deals with the description of the germination and early 

 stage of the growth and development of the rhizomes of some plants, mostly 

 W . ^ from North America. The greater part of the material upon which it is based 



r 



was collected in the immediate vicinity of Washington. The foreign materials, 

 as well as some of the rarer North American species, were obtained from 

 the U. S. Botanical Garden, where they had been cultivated by Mr. G. W. 

 Oliver, to whom the author is under especial obligations. The author is also 

 greatly indebted to Prof. F. H. Knowlton, w^ho has kindly looked over the 

 manuscript and suggested several alterations in regard to the language, and 

 recommended the use of some botanical terms. 



RANUNCULACE^. 



Anemone thalictroides. 



This plant was first described by Linne, and referred to 

 the genus Anemone, and later has been transferred from one 

 genus to another by various authors. Michaux placed it 

 under Thalictriim, and Asa Gray, accepting the suggestion of 

 Michaux in regard to its systematic position, called it Thalic- 

 trmn anemonozdeSy althoutjh with the additional subg^eneric 



name of Syndesmon of Hoffmansegg. 



The plant was then again placed under Anemone by Ben- 

 tham and Hooker as representing the subgenus ^' Syndesmon^^ 

 considered as identical with Anemonella of Spach. In the 

 6th edition of Gray's Manual, revised by Watson and 



