24 



URTICACEAE 



UJmus [Tourn.] L. Elm. 



fuha Michx. Slippery Elm. Local. 



americana L. American Elm. 

 Celtis [Tourn.] L. Nettle-tree. Hackberry. 



occjdentalis L. Sugarberry. Local. 



occidentalis L. var. pumila Muhl. Mt. Holyoke, H. G. Jesup. 



occidentahs L. var. crassifoha (Lam.) Gray. Hadley, E. Tuck- 

 erman ; Amherst. 

 Cannabis [Tourn.] L. Hemp. 



SATIVA L. 



Humulus L. Hop. 



Lupulus L. Common Hop. 



japonicus Sieb. and Zucc. Clay-pit dumping ground, Spring- 

 field, L. Andrews. 

 Morus [Tourn.] L. Mulberry. 



rubra L. Red Mulberry. Uncommon. 



ALBA L. White Mulberry. Amherst, etc. 

 Urtica [Tourn.] L. Nettle. 



gracilis Ait. 



URENS L. 



Laportea Gaud. Wood Nettle. 



canadensis (L.) Gaud. 

 Piha Lindl. Richweed. 



pumila (L.) Gray. 

 Boehmeria Jacq. False Nettle. 



cylindrica (L.) Sw. 

 Parietaria [Tourn.] L. Pellitory. 



pennsyhanica Muhl. Sugar Loaf, Mt. Toby, etc. 



SANTALACEAE 

 Comandra Nutt. Bastard Toad-flax. 

 umbellata (L.) Nutt. 



LORANTHACEAE 

 Arceuthobium Bieb. 



pusillum Peck. Dwarf Mistletoe. Parasitic on Black Spruce. 



ARISTOLOCHIACEAE 

 Asarum [Tourn.] L. Wild Ginger. 



canadense L. 

 Aristolochia [Tourn.] L. Birthwort. 



Serpentaria L. Virginia Snakeroot. Included in Dr. Tucker- 

 man's list as from Turners Falls, but doubtful. 



