OF WESTCHESTER COUNTY. 813 



Lariz, Toum. (Larch.) 



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

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



Thuja, Toum. (Arbor Vitas.) 



T. occidentalis, L. (American Arbor Vitae.) 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. 



OLiSS n.-MON00OTYLEDONOUS OK ENDOGENOUS PLANTS. 



Order 107.— ARACES, (Arum FamilyO 



Ariseema, 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. fcetidus, Salisb. Damp grounds ; common 



Acorus, L. (Sweet Flag. C.ilamus.) 



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



Order 108.— LEMNACE^. (Duckweed Pamilj.) 



Lemna, L. (Duckweed. Duck's-meat.) 

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



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



Typha, Toum. (Cat-tail Flag.) 

 T. latifolia, L. Wet places. 

 T. angustifolia, L. Wet places. 



Sparganium, Toum. (Bur-reed) 



S. eurycarpum, Engelm. (Bicknell.) 

 S. simplex, Hudson. Not rare. 



