1921] Fernald,— Expedition to Nova Scotia 233 



E. OBTUSA (Willd.) Schultes. Seen in the southwestern counties 

 only at Springhaven, Yarmouth Co. Frequent from Annapolis 

 Co. eastward. 



E. uniglumis Schultes. E. palustris, var. glaucesecns of American 

 authors. Brackish and saline shores, common. 



** E. tuberculosa (Michx.) R. & S., var. pubnicoensis, n. var., 

 a forma typica differt squamis castaneis; setis perianthii laevibus; 

 achaeniis superne evidenter constrictis pallide viridibus; tuberculo 

 viridiscenti deltoideo-ovato vix inflato achaeniis minore. 



Differing from the typical form in its castaneous scales: perianth- 

 bristles smooth: achenes definitely constricted to a thick neck, pale 

 green: tubercle greenish, deltoid-ovate, scarcely inflated, smaller 

 than the achene.— Nova Scotia: boggy savannah and sandy beach 

 by Great Pubnico Lake, Yarmouth Co., September 6, 1920, Fernald, 

 Long & hinder, nos. 20,163 (type in Gray Herb.), 20,164. See pp 

 167, 169. 



In typical E. tuberculosa of the coastal plain the scales are paler, 

 often whitish; the bristles barbed; the achene rarely with a definite 

 neck and in maturity deeper colored or even olive and the whitish 

 almost inflated tubercle closely sessile and usually as large as or 

 larger than the achene. 



** E. kostellata Torr. Saline or brackish marshes and swales of 

 Yarmouth Co.: Sand Beach, Chebogue, Tusket, Argyle. See pp. 

 103, 105, 110, 149. 



SciRPUS nanus Spreng. Recorded by Maeoun and by Nichols 

 from Cape Breton, and by St. John from Sable Island. On several 

 marshes of Digby and Yarmouth Cos. 



*S. pauciflorus Light!'. Springy border of salt marsh at head of 

 Baddeck Bay, Victoria Co. See p. 164. 



S. CESPITOSUS L., var. callosus Bigel.; Fernald, RhodORA, xxiii. 

 24 (1921). Abundant on dryish peaty barrens of Digby, Yarmouth 

 and Shelburne Cos. and on Cape Breton. Doubtless general on the 

 Atlantic slope of the peninsula. See pp. 99, 148. 



S. HUDSONIANUS (Michx.) Fernald. Frequent from Cape Breton 

 to Digby Neck and Cumberland and Lunenburg Cos. See p. 131. 



S. subterminalis Torr. Sandy and peaty pools and lake-margins, 

 Yarmouth Co. to Hants, and presumably general. Recorded by 

 Maeoun and by Nichols from northern Cape Breton. See p. 148. 



S. rufus (Huds.) Schrad. Brackish or saline marsh, Sand Beach, 

 Yarmouth Co. See p. 103. Recorded by Nichols from northern 

 Cape Breton. 



** S. Olneyi Gray. Salt and brackish marshes and swales of 

 Yarmouth Co.: Sand Beach, Chebogue, Arcadia, Tusket, Eel Lake. 

 See pp. 103, 110, 142. 



S. validus Vahl. Brackish or calcareous pools, frequenl through- 

 out. 



