58 



ALISMA, L. WATER-PLANTAIN. 

 A. Plantago, L., var. Americanum, Gray. 

 Near the Creeks. 



SAGITTARIA, L. ARROW-HEAD. 

 S. variabilis, Engelm. 



HYDROCHARIDACEiE. 



VALLISNERIA, Micheli. 

 V. spiralis, L. EEL-GRASS. 



CommoD in Hummock and Long Ponds. 



ORCHIDACEjE. 



HABENARIA, Willd., R. Br. 



U. tridentata, Hook. 



Long Pond. Mrs. Emily Shaw Forman. 



H. ciliaris, R. Br. YELLOW FRINGED ORCHIS. 

 The only plant ever known on the island found in bloom by 

 Mrs. E. W. Perry in 1872 ; it was growing in Mr. Levi Cof- 

 fin's farm, on the ridge of a road that passes through it from 

 Siasconset to Polpis. 



H. blephariglottis, Hook. WHITE FRINGED ORCHIS. 



Once abundant on the edge of swamps near Siasconset ; rarer 

 now. 



H. blephariglottis, Hook., var. holopetala, Gray. 



Near edge of swamp opposite Bloomingdale. L. L. D. 



H. lacera, R. Br. GREEN FRINGED ORCHIS. 



SPIRANTHES, Richard. LADIES' TRESSES. 



S. cernua, Richard. 



S. gracilis, Big. 



S. simplex, Gray. 



First reported by Dr. Robbins before 1867. On the dry com- 

 mons between Polpis and town, growing with S. gracilis ; 

 rather abundant. M. L. 0., 1880. Found in equal abun- 

 bance on the road to Miacomet by Mrs. Geo. H. Mackay. 

 The plant seems capricious ; in some years it is hardly to be 

 seen. Abundant west of Miacomet in 1885. C. & D. 



