44 ROCHESTER ACADEMY OF SCIENCE. []&"• I^) 



REPORT OF THE SECTION OF BOTANY. 



Read by Mrs. J. H. McGuire, Recorder of the Section. 



The officers of the Section ^ire : Miss Mary E. Macauley, Presi- 

 dent ; Miss Florence Beckwith, Vice-President ; Mrs. J. H. McGuire, 

 Recorder. 



Extracts from the Minutes of the Section. 



January i6, 1891. Microscopical studies. Mr. Streeter exhib- 

 ited the streaming of protoplasm in the cells of the Onion. The 

 cyclosis was very well marked. He also exhibited the fibro-vascular 

 bundle in Bryony and a section of Pteris, showing fibro-vascular 

 bundle in underground stem and also the scalariform and sieve tis- 

 sues ; intercellular spaces of leaf-stalk of Water-lily and Rush; epi- 

 dermis of Narcissus ; epidermis of Cabbage ; sections of Cedar show- 

 ing the pitted vessels and the medullary rays. 



February 13, 1891. Mr. Dumond exhibited a growing plant of 

 Dandelion with blossoms and fruit. The plant was found in a crevice 

 of a brick wall. The microscopical studies were : soft tissue of pith of 

 Elder ; thick-angled tissue of flowering stalk of Rose ; stony tissue of 

 Black Walnut ; bast and wood fibre ; tissue of Soft Maple, showing 

 bordered pits ; bast tissue of Abiitilon ; milk tissue of Salsify root, 

 showing starch grains ; and sieve tissue of Pumpkin stem. 



February 27, 1891. Mr. Dumond showed stomata of Oleander 

 in which the guard cells were found in a depression which extended 

 into the palisade tissue. The depression was lined with hairs, com- 

 pletely concealing the stomata which could only be seen in a cross 

 section. Bone shaped starch granules were shown in Euphorbia. 

 Specimens of Jiingermannia repta/is, J. trichophylla, J. curt<ifoiia and 

 Sphagnum cymlnfoliuin, found in Bergen by Mr. Booth, and mounted 

 by him, were exhibited. Miss Beckwith exhibited Poa annua, and 

 reported Chickweed in blossom February 24. 



March 27, 1891. Mr. Dumond exhibited two specimens of Fro- 

 tococcus nivalis, cultivated by him under varying conditions. One 

 specimen was grown in Hemlock Lake water, the other in water from 

 ice. The latter showed a much more abundant growth than the for- 

 mer. Mr. Dumond also exhibited Batrachospermum monilliforme. 



Mr. Streeter exhibited a specimen of Alga, having some resem- 

 blance to water-flannel. It was reserved for future study. Miss 

 Beckwith reported Chickweed in blossom March 12. 



