300 ROCHESTER ACADEMY OF SCIENCE. JunC 25, 



in appearance to heads of wheat. Spartina cynosiiroides, the fresh 

 water cord-grass, is not clearly distinguishable from the maritime 

 species. It is a tall, coarse grass, but evidently has not held its 

 strength in this locality. Phalaris arundinacea is a tall-growing spe- 

 cies of the Canary grass genus. The Glycerias, of which three are 

 found here, have no more beautiful species than Glyceria fluiiafis;^h.\ch 

 is one of our most graceful marsh grasses. Yet the Phragmites com- 

 mu7iisy with its heavy panicles of silky spikelets, must be awarded the 

 palm in the entire series of attractive grasses of this flora. The 

 Andropogons are represented by the species furcatus. Six species of 

 Panicums have formerly been found here, but the most rare and nota- 

 ble, Panicutn, virgatiim has disappeared. 



Characecc, or stoneworts, have a representative which has a habit 

 of appearing and disappearing in quiet waters in a very strange man- 

 ner. One summer the deep trench by the railway was almost filled, 

 while the next season there was scarcely a trace remaining. 



The marsh fern, Aspidium thelypte7-is, and Ophioglossum vulgahim, 

 are representatives of the ferns. 



One rare moss, Drumtnondia clavellata, is alone worth mentioning. 



In conclusion, I would say that of the plants and trees noticed, 

 there are seventy genera. 



Professor Henry A. Ward exhibited a specimen of marine algae 

 from the coast of California, and described the plant's structure and 

 the growth of the fields of giant alg^e which border the Pacific coast. 



Exhibits of material were made by the Section, as follows : A 

 series of original sketches of native flowers, both plain and in water 

 colors, was shown by Mr. John Walton. These drawings were very 

 beautiful and perfect representations, both as regards drawing and 

 coloring, of a large number of our wild flowers. 



Mr. William Streeter showed living Fo/vox, illustrating the paper 

 of Mr. Dumond. 



Members of the Section exhibited a large number of species of 

 rare native plants collected from Bergen swamp, the shores of Iron- 

 dequoit bay, and other localities ; among these were Sarracenia purpu- 

 rea, Cypripediuvi pubescens, C. speciabile, Liparis liliifolia, L. Lo^selii, 

 Spiranthes Romanzoffiana, Arethusa bullosa, Habenaria hyperborea, H. 

 lacera, Calopogon pulc/ielhts, Tofieldia glutinosa, Lilium Canadense, Mon- 

 eses unijlora, Monotropa Ilypopitys, Aphyllon tmiflora, Linmxa borealis, 

 Valeriana sylvatica. 



A collection of twelve grasses was exhibited by Mr. C. M. Booth. 



