14 



with large, beautiful nocturnal flowers, a member of Berger's 

 subgenus Hylocereiis ; Cereus grandiflorus, the best-known night- 

 bloomer, belonging in Berger's subsection Selenicereiis ; the curi- 

 ous Ccrciis Grcggii with slender stem and very large tuberous 

 subterranean part, representing the subsection Pcnioccreus of 

 Berger ; the Central American Ccrciis baxauiensis of the group 

 AcantJiocereiis ; the Costa Rican Cereus Gonsalezii, of Berger's 

 subgenus Leptoccreiis ; and also representatives of Engelmann's 

 subgenus Echinocereiis. Other specimens were exhibited to 

 illustrate the genera Phyllocactus, Epiphyllmn, Cactus, EcJiino- 

 cactus, Melocactus, Ariocarpus, Pelecyphora, Rhipsaiis, Opuntia, 

 Nopalea, and the curious Fereskia, with its leafy, vine-like or 

 shrubby stems. 



Adjournment followed. 



Marshall A. Howe, 



Secretary pro tem. 



December 12, 1905 



This meeting was held at the American Museum of Natural 

 History, with President Rusby in the chair. Thirty-four persons 

 were present. 



The following three persons were elected to active membership : 

 Dr. Manuel Gomez de la Maza, Director del Jardin Botanico, 

 Havana, Cuba; Mr. Henry Allan Gleason, 211 West 108th St., 

 New York City ; Mr. Stafford C. Edwards, New Brighton, 

 Staten Island. 



The announced paper of the evening was by Dr. Henry 

 Kraemer and was entitled " Some Studies on Color in Plants 

 and the artificial Coloring of Flowers." The subject of color 

 in plants was considered first from a morphological and chemical 

 point of view, and the speaker performed various illustrative 

 chemical experiments involving changes of color in liquid media. 

 The results of numerous experiments on the control of color in 

 living plants and on the artificial coloring of cut flowers were 

 given. Dr. Kraemer's paper will be published in full in the 

 Bulletin of the Club. The following is his abstract of the more 

 important results of his observations and experiments : 



" I. Unorganized or cell-sap color substances are distributed 



