xvi Th? Tti<>l<jic<il Suriety of Washington. 



January 27, 1900 aiyth Meeting. 



The President in the chair and 30 persons present. 



William Palmer exhibited specimens of abnormal fern fronds. 



H. J. Webber exhibited specimens and photographs of aerat 

 ing roots of Taxodiutn, Arfcerinia, Laguncularia, and Rhizo- 

 phora. 



O. F. Cook described a mangrove growing on dry land in 

 Africa. 



W. T. Swingle spoke of the occurrence of cypress knees in 

 Europe where Doctor Lotsy stated they were not formed. 



The following communications were presented: 



T. A. Williams: Notes on a New Lecidea from Mexico. 



Barton W. Evermann: Some observations concerning Species 

 and Subspecies.* 



February 10, 1900 31 8th Meeting. 



The President in the chair and 45 persons present. 



H. J. Webber exhibited a photograph of the tropical papaw 

 ( Carica papaya). 



B. W. Evermann described the papaw as occurring in Puerto 

 Rico. 



The following communications were presented: 



Henry W. Olds: Form in the Songs of Birds. 



M. G. Kains: The Effect of the Electric Arc Light in the 

 Culture of Easter Lilies, f 



E. V. Wilcox: Lupines as Plants Poisonous to Stock.]; 



February 24, 1900319^1 Meeting. 



The President in the chair and 8 persons present. 

 The following communications were presented: 

 W. A. Orton: The Sap-Flow of the Maple in Spring. 

 M. B. Waite: Michigan Peach Orchards. 



*Science, n. s., n: 451-455. March 23, 1900. 

 fFlorists Exchange, Feb. 22, 1900. 

 jjour. Comp. Med. and Vet. Arch. 20: 666-774. 1899. 

 gReport Maryland State Hort. Soc. 2: 41. 



