Pennsylvania for Sessions igoi-igoj. Ixxix 



lunatus from forty-eight to eighty hours and the cherry 

 tomato, Lycopersiciim csciilentnm, for three days. 



Dr. Alacfarlane 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 artcmisifolia) 

 was abundant in some spots and acted as an irritant. He 

 classified the flora of the island under four heads : ( i ) 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 campannlata, 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 (Coniuin maculatiim) 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 Acker manni which had opened that evening on a plant 



