Contributions to the Life History of Amphi- 



carpsea Monoica. 



(WITH PLATES XIX-XXXVI.) 



By Adeline F. Schively, Ph.D., 



Assistant Teacher iu the Department of Biology, Philadelphia Normal School. 



THE Genus Amphicarpcea was established by Elliott 1 

 in 1 8 17. An account of his observations may be 

 found in the Journal of the Academy of Natural 

 Sciences of Philadelphia. He mentions in "The Botany 

 of the South " 2 two species — A. monoica and A. sarmentosa. 



In the "Genera Plantarum" are enumerated seven spe- 

 cies inhabiting North America, Japan and the Himalayas. 



The Genus is stated to contain fifteen species in " Die 

 naturlichen Pflanzenfamilien." These are distributed as 

 indicated above, except that two additional are mentioned 

 as occurring in Tropical America. These are A. pulchella 

 and A. angustifolia — both found in Mexico, the latter also 

 as far south as Peru. 



Both publications give A. Edgeworthii \n the Himalayas, 

 also A. monoica in North America. Neither records A. 

 sarmentosa and A. Pitcheri, which are mentioned in some 

 of the leading American Manuals of Botany. 



The investigation of A. monoica was undertaken at the 

 suggestion of Professor Macfarlane, who studied the sensi- 

 tive movements of the plant, and also the production of 

 cotyledonary buds. My work has progressed under his 

 supervision. 



The scientists who have worked upon Amphicarpcea will 

 now be mentioned in chronological order. 



Darwin 11 experimented upon the movements of the leaves 

 and also upon the shoots producing subterranean legumes. 

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