102 FLORA OF THE UPPER SUSQUEHANNA. 



\ ABIES Juss. 



A. balsamea (L.) Mill. Balsam Fir. "TheVlai," near One- 

 onta; scarce, Noj'. Swamp near Pharsalia, C^t////^. The only 

 stations. In cultivation and ocjasionally escaped, Graves. 



LARIX Adans. 



L. laricina (DuRoi)Koch. Tamarack. Larch. Black Larch. 

 Hackmatack. In our range found naturally only in cold swamps, 

 Coville ; Lucy; Clute; Hoy. Elsewhere cultivated as a shade 

 tree, and probably occasionally escaped. Certain swamps are 

 known as "tamarack swamps" from the prevalence of this tree in 

 them. One of the few conifers that are not evergreen. When 

 grown alone it forms a very han isome tree, ( Z. Americana 

 Michx.) 



THUJA L. 



T. occidentalis L. Arbor Vit.e. White Cedar. Not uncom- 

 mon at Unadilla Forks, Brown. Elsewhere occasional in cul- 

 tivation. 



JUNIPERUS L. 



J. Virginiana L. Red Cedar. Savin. Rare as a native in our 

 region. Mountain House Narrows; Chemung Narrows, Lucy. 

 Elsewhere plentiful in cultivation. 



TAXUS L. 



T. minor (Michx.) Britton. Ground Hemlock. American Yew. 

 Tolerably common on moist, shaded banks and in ravines. A 

 shrub seldom more than five feet high, closely resembling the 

 common hemlock, but with foliage lacking the hemlock's char- 

 acteristic odor, ( T. Canadensis Willd.) 



HYDROCHARITACE/C. 



UDORA NuTT, 



U. Canadensis (Michx.) Nutt, Ditch Moss. Watkr Snake- 

 weed. Common in ponds and slow streams, A curious moss- 

 like plant, often forming thick mats in shallow water. ( Elodea 

 Canadensis Michx.) 



