Pennsylvania for Sessions Igo0I-1903. Ixxix 
lunatus from forty-eight to eighty hours and the cherry 
tomato, Lycopersicum esculentum, for three days. 
Dr. Macfarlane then gave “Notes on the Flora of Orr’s 
Island, Me.” The speaker stated that he spent September 
there mainly in order to escape the effects of hay fever. The 
experiment was almost successful, though owing to care- 
less cultivation the low ragweed (Ambrosia artemustfolia) 
was abundant in some spots and acted as an irritant. He 
classified the flora of the island under four heads: (1) the 
tree flora; (2) the assemblage of herbaceous types that 
shelter under trees; (3) the swamp flora, and (4) the intro- 
duced or exotic flora. The tree flora consisted mainly of 
three evergreen conifers, the balsam, the green and the black 
spruce, while the hemlock spruce was rare and the white 
cedar was abundant only in restricted areas. The juniper 
everywhere formed great rounded patches, which stood out 
very conspicuously when the taller trees were cut out. The 
relation of these to the second or herbaceous assemblage, the 
speaker regarded as intimate, in that the decaying twigs and 
leaves of the conifers formed a definite nidus for the her- 
baceous ones, some of which were known already to be 
coniferous saprophytes, while the remaining ones in which 
saprophytism had still to be demonstrated, would probably 
be shown to be thus associated. The swamp flora included 
the Droseras, Lysimachia stricta, Elodea campanulata, etc., 
while in swampy rills was an abundance of the fringed gen- 
tian. The introduced plants included the usual garden 
weeds, the most objectionable being the above mentioned 
ragweed. At one point along the rocky way near the Post 
Office, a plant of the hemlock (Conium maculatum) about 
five feet in height was observed in flower and fruit. 
Mr. Greensmith next exhibited and commented in an 
interesting manner on a large set of specimens from the 
Dreer Garden. 
Mr. Tomlinson exhibited three fine blooms of Phyllocac- 
tus Ackermanni which had opened that evening on a plant 
