158 
e best method of obtaining rose pollen was, after removing 
a 
i ry pend 
species of plant and; though these buckets were filled at least 
thea : 
oa of pollen for use in the early spring, we grew a crop of 
ragweed from seeds, under glass. 
Record is here made of the species from which pollen has been 
obtained for these interesting, and, it is to be hoped, important 
investigations. 
Austrian Pine PINUS AUSTRIACA Hiss. 
tara teae Black Pine Pinus THunRERG Parl. 
Pitch Pin INUS RIGIDA Mill. 
Broad- ee Cat-tail TypHa LATIFOLIA L. 
June Grass A PRATENSIS L 
Orchard Grass DacTYLIs GLOME 
Velvet Grass Parenter LANATUS i ) Nash 
Timothy P: PRATENSE L. 
Red-top eee ALB. 
Pig-nut Hickory HICORIA GLABRA «oni ) Britton 
Cherry Birch BET 
Swamp Oal ae RCUS PALUSTRIS Du Roi 
Swamp White Oak QUERCUS BICOLOR Will 
