420 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



Monocotyledon (culm or petiole?) gen, 



et sp.? 



Passiflora canadensis n. sp. 

 Platanus pseudocoideniaUs n. sp. 

 Quercus Icootenayensis n. sp. 



Passiflora incarnata Linnaeus. 



Platanus occidentalis Linnaeus. 



Quercus tepicana Trelease. Q. Prinus 

 Linnaeus. 



Quercus Schofieldii n. sp. 



Quercus Galcottii Martens. Q. insignis 

 Martens and Galeotti. Q. cyclohal- 

 anoides Trelease. Q. odcarpa Liebman. 



Tilia? incerta n. sp. 



Tilia americana Linnaeus. T. hetero- 

 pliylla Ventenat. 



Vaccinium pseudocorymbosum ii. sp. 

 Viti^ alia n. sp. 



Vaccinium corymbosum Linnaeus. 



Vitis aestivalis Miehaux. V. riparia 

 Michaux. V. cordifolia Miehaux. 



From tlie viewpoint of geographical distribution an analysis 

 of the flora represented by the existing genera in the above list 

 is of interest, especially in connection with the climatic condi- 

 tions that they indicate. 



The genus Alnus is common to both the Old AVorld and the 

 New, in the northern hemisphere, extending southward along 

 the mountains of Central and South America to the equatorial 

 region. A. ohlongifolia is native in Arizona, New Mexico, and 

 Mexico. A. serrulata is distributed throughout the eastern 

 United States to as far north as Minnesota. A, fndicosa {= A. 

 sitchensis Sargent!) is apparently limited in its distribution to 

 Yulvon Territory, Alaska, and Eastern Siberia. A. rotundifolia 

 {= A. glutinosa Gaertner) is a European species. 



The genus Betida is of north temperate and boreal distribu- 

 tion, in both the Old World and the New. B. lenta occupies a 

 region that embraces Newfoundland and Ontario on the north to 

 Florida and Tennessee on the south. B. cordifolia ranges from 

 Newfoundland to British Columbia, southward to Maine, north- 

 ern New York, and Iowa, B. lutea has a distribution that in- 

 cludes Newfoundland to Manitoba in the north, to as far south 

 as the latitude of Pennsylvania. 



Cehatha is a cosmopolitan genus of tropical and subtropical 

 distribution. C. Carolina is scattered throughout the eastern 

 United States northward to Illinois. 



Cissampelos is a generic element in the tropical floras of 

 Africa and America. C. Pareira, in its numerous forms, is 



