1892.] REPORT OF BOTANICAL SECTION. 45 



April 10, 1891. A specimen of Tetraspora was examined. The 

 characteristic division by fours was well defined. Other microscop- 

 ical studies were, epidermis of Century plant, showing needle-shaped 

 crystals and the parenchyma tissue ; section of petiole of Verbena 

 showing fibro-vascular bundles ; Drapernaldia glomerata. 



April 10,1891. Mr. Streeter reported results of study of Ulothrix 

 zonata. He had secured a specimen which had completed the stage of 

 conjugation, and was growing vigorously. It had millions of Euglena, 

 which again developed into the resting condition of Protococcus. 

 These changes seemed to him to be identical with the processes of 

 growth of Batrachospermum monillifor77ie, Drapernaldia glomerata, 

 Spirogyra and others. These observations suggest the idea of a 

 common origin. 



April 24, 1 89 1. A large number of spring blossoms shown by 

 members of the Section. Among the microscopical studies was a fine 

 specimen of Peziza. The spore sacs were well defined. The Alga 

 resembling water flannel, referred from a former meeting, and now 

 in a more advanced stage of growth was pronounced to be Ulothrix 

 zonata. 



May 8, 1891. A fine specimen of Jeffersonia found by Mr. 

 Walton near Pittsford, was exhibited. 



Among other spring flowers, five varieties of violet were exhib- 

 ited, viz : V. palniata, V. ciicitllata, V. blanda, V. rostraia, V. pubescens. 



A stipe was shown upon which a large number of diatoms were 

 growing. 



May 22, 1891. Miss Macauley showed Floerkia proserpinacoides 

 found near Fairport, and never before brought to the Section. 



May 29, 1891. Miss Beckwith exhibited leaf of Jeffersonia, 

 measuring 6 inches by 4 inches, Viola palmata, V. hastata, V. ros- 

 trata, V. cucullata, Camelina sativa, Cypripediiim pubescens. 



Mr. Dumond exhibited an abnormal plant, destitute of chlor- 

 ophyll, although growing from a corm, and having roots. Two leaves 

 were developed and a third was partially grown. No one recognized 

 the plant, and its lack of color was the subject of various conjectures. 



June 24, 1891. A number of plants found at Bergen were exam- 

 ined, the Section having made a recent excursion to that place. They 

 were : Cypripedium pubescens, C. spectabile, Habenaria dilataia, Pogonia 

 ophioglossoides, Triglochin maritima, Linnaa borealis, Galium boreale, 



