144 The Ottawa Naturalist. 



(1947.) U. Americana, Linn. American Elm. 

 N.S. ; N.B. ': Que.; Ont. ; Man. ; N.W.T. 

 Large tree ; hardy. 



(1948.) U. racemosa, Thomas. Rock Elm. 

 Que. ; Ont. 

 Tree ; hardy. 



536. CELTIS, Linn. (Nettle Tree ) 



(1949.) C. occidentals, Linn. Sugar-Berry. 

 Que. ; Ont. 

 Tree ; hardy. 



539. MORUS, Linn. (Mulberry.) 



(1952.) M. rubra, Linn. Red Mulberry. 

 Western Oniario. 

 Small tree ; hardy. 



XCIV. PLATANACE^. Plane-Tree Family. 



545. PLATANUS, Linn. (Button-Wood.) 

 (1963.) P. occidentals, Linn. 



Western Ontario. 



Large tree ; hardy ; leaves ornamental. 



XCV. JUG LAN DACE^. Walnut Family. 



546. CARYA, Nutt, (Hickory.) 



(1964.) C. alba, Nutt. Shell-bark Hickory. 

 Que. ; Ont. 



Large tree ; hardy. 



(1966.) C PORCINA, Nutt. Pig-nut or Brown Hickory. 

 Western Ontario. 



Tree ; recently planted. 



(1967.) C. amara, Nutt. Bitter-nut Hickory. 

 Que. ; Ont. 

 Tree ; hardy. 



