WOODY PLANTS OF MANHATTAN 



2. Prickles not representing branches. 

 In position of stipules. 



Buds hidden by leaf-scar Robinia. 19 



Buds exposed, red pubescent Zanthoxylum. 4 



Scattered. 



Plant provided with tendrils Smilax. 47 



No tendrils. 



A triple spine below leaf-scar Ribes. 28 



Twigs strongly glaucous or else 5-ndged. .Rubus. 24 

 Twigs cylindrical and at most only slightly 



glaucous Rosa. 25 



I). Plants unarmed. 



1. Buds naked. 



Dark brown, silky Asimina. 1 



Pubescence buff or gray. 



Bundle-scar one Ceanothus. it 



Bundle-scars several Rhus. 3 7 



2. Buds scaly. 



*Yines. 



Provided with tendrils. 



Woody partitions at nodes Vitis. 10 



No partitions at nodes. 



Aerial rootlets on old parts; tendrils irregu- 

 larly branching Ampelopsis. 12 



No aerial rootlets; tendrils forked Cissus. 11 



No tendrils. 



Leaf-scars semicircular Celastrus. 6 



Leaf-scars circular Menispermum. 2 



**Not vines. 



fLeaf-scars two-ranked. 

 Buds glabrous. 



Superposed Cercis. 20 



Single. 



Scales two or three Tilia. 3 



Scales several. 



Twigs brown Ulmus. 85 



Twigs light colored Morus. 38 



Buds pubescent. 



Pith diaphragmed Celtis. .% 



Pith homogeneous. 



Buds dark brown, silky Ulmus. 35 



Buds light brown, sparingly pubescent. 



Conical, pointed Ostrya. 43 



Flattened, rounded Corylus. 42 



ttLeaf-scars more than two-ranked. 

 Pith 5-angled. 



Upper buds clustered at apex of twig — (^uercus. 44 



