OF WESTCHESTER COUNTY. 813 



Larix, Tourn. (Larch.) 



L. Americana, Mx. (Larch, Black Larch, Hackmatack, Tamarack.) A 

 large tree, used for ornamental purposes, and for lumber. 



Thuja, Tourn. (Arbor Vitae.) 



T. occidentalis, L. (American Arbor Vitse.) This tree is also called Cedar, 

 in the north where it is used in the manufacture of barrels. It is a favorite orna- 

 mental tree ; largely used in hedges. 



Juniperus, L. (Juniper.) 



J. Virginiana, L. (Red Cedar.) A tree from 15 to 40 feet high in these 

 limits ! wood is close-grained and takes a good polish ; makes durable fence posts. 



GLASS n.- MONOCOTYLEDONOTJS OR ENDOGENOUS PLANTS. 



Order 107.— ARACE2S, (Arum Family.) 



Arissema, Martius. (Indian Turnip.) 

 A. triphyllum, Torr. Damp places. 



Peltandra, Raf. 



P. Virginica, Raf. Shoal water, or very wet places. (Leggett.) 



Calla, L. (Water Arum.) 



C. palustris, L. Cold swampy land. Sing Sing, (Dr. Fisher.) 



Symplocarpus, Salisb. (Skunk Cabbage.) 



S. foetidus, Salisb. Damp grounds ; common 



Acorns, L. (Sweet Flag. Calamus.) 



A. Calamus, L. Margins of small streams in swampy places. 



Order 103— LEMNACEiE. (Duckweed Family.) 



Leinna, L. (Duckweed. Duck's-meat._) 

 L. polyrrhiza, L. Ponds. (Leggett.) 



Order 109.— TYPHACEJE. (Cat-tail Family.) 



Typha, Tourn. (Cat-tail Flag.) 

 T. latifolia, L. Wet places. 

 T. angustifolia, L. Wet places. 



Sparganhmi, Tourn. (Bur-reed) 



S. eurycarpum, Engelm. (Bicknell.) 

 S. simplex, Hudson. Not rare. 



