PRELIMINARY LIST OF THE MAMMALS OF NEW YORK 



287 



The almost total absence of exact knowledge of the distribution of 

 plants is especially apparent when an attempt is made to catalogue the 

 more prominent species characteristic of the transition zone. While 

 there are doubtless many species confined to this zone it is impossible 

 with the data at hand to make any positive statement concerning them. 

 The flora of the region occupied by the transition zone may be recog- 

 nized primarily by the absence of the strictly boreal* and austral forms, 

 and secondarily by the mixture of northern and southern types of which 

 it is composed. As in the case of the mammals and birds the austral 

 elements predominate. The following southern flowering plants, among 

 others, find their northern limit in some part of the transition zone: 



Pontederia cordata 

 Trillium grandiflorum 

 Trillium cernuum 

 Lilium philadelphicum 

 Smilax hispida 

 Smilax herbacea 

 Gyrostachys cernua 

 Chamaecyparis ihyoides 

 Juglans nigra 

 Ulmics fulva 

 Ulmus racemosa 

 Benzoin benzoin 

 Sassafras sassafras 

 Dia?ithera americana 

 Conopholis americana 

 Pentstemon hirsutus 

 Datura tatula 

 Datura stramonium 

 AscUpias verticillata 

 Asclepias tuberosa 

 Azalea viscosa 

 Nyssa aquatica 

 Rhexia virginica 

 Meibomia grandiflora 

 Meibomia paniculata 

 Crotalaria sagittalis 

 Poly gala polygama 

 Polygala nuttallii 



pickerel-weed 

 large-flowered wake-robin 

 nodding wake-robin 

 red lily 



hispid green-brier 

 carrion-flower 

 nodding ladies' tresses 

 southern white cedar 

 black walnut 



slippery, red or moose elm 

 cork or rock elm 

 spice-bush 



sassafras or ague tree 



dense-flowered water willow 



squaw-root 



hairy beard-tongue 



purple thorn-apple 



Jamestown or jimson-weed 



whorled milkweed 



butterfly-weed 



swamp pink or honeysuckle 



large tupelo 



meadow-beauty 



pointed-leaved tick-trefoil 



panicled tick-trefoil 



rattle-box 



racemed milkwort 



Nuttall's milkwort 



