16 The Ottawa Naturalist. [April 



1. Cyperus Schweinitzii Torr.: Collected at Oka, P.Q., 

 on the alluvial barrens bordering the Lake of Two-Mountains. 

 It was hitherto known in Canada only from the Great Lakes 

 region, southern Ontario and the Northwest. The limits 

 of this Cyperus are, therefore, considerably extended; it will 

 probably prove to be fairly abundant in the Lower Ottawa 

 Valley, when properly separated from common C. esculentus L. 

 In the field, C. Shcweinitzii can be readily distinguished from 

 C. esculentus L. by its much more slender culm. 



2. Scirpus Torreyi Olney: Collected at St.-Eustache, P.Q., 

 in the Ottawa River, near the outlet of the Lake of Two-Moun- 

 tains. This large Bulrush belongs to the group of common 

 Scirpus Americanus Pers. Up to the present time, the northern 

 limit of Scirpus Torreyi was not supposed to intersect the 

 boundary line between Canada and United States. The 

 present discovery would lead us to conclude that it occurs 

 throughout the waterways of western Quebec. Scirpus Torreyi 

 fruits later than any other tall Bulrush in the east. In early 

 August, the St-Eustache specimens were yet poorly developed 

 though sufficiently mature to permit certain identification. 



3. Scirpus pedicellatus Fernald: St-Bruno, P.Q. In clear- 

 ings, on peat, August, 1912. Recently separated by Prof. 

 Fernald, of the Gray Herbarium., 



4. Scirpus atrocinctus Fernald: Alluvial banks, Lake 

 Nominingue, P.Q., August, 1912. Also recently separated. Will 

 prove abundant in Quebec. Many herbarium specimens labelled 

 5. cyperinus are likely this species. 



5. Scirpus atrocinctus Fernald, var. brachypodus Fernald. 

 Chateauguay, P.Q., July, 1912. Spikelets in dense, irregular 

 clusters, the boreal form of the species. 



6. Scirpus cyperinus (L) Kunth, var. pelius Fernald. 

 Alluvial banks, Lake Nominingue, P.Q., August, 1912. _ Growing 

 intermingled with 5. atrocinctus. The very long involucral 

 bracts characterize the species as does the deep colour of the 

 involucels for the variety. The plant begins to fruit when 

 5. atrocinctus is already mature. 



7. Scirpus subterminalis Torr. : Aquatic, nearly submerged 

 species. First collected in 1908, in Megantic Co. (Nat. Can. 

 XXXVI, No. 5; mai, 1909). Found again in a small lake near 

 St-Jeromc, Terrebonne Co. This interesting species must range 

 throughout Quebec. 



That further investigation will add much to our knowledge 

 of the Cyperaceae in Quebec, is beyond doubt. More materia!. 

 however, and a close study of collections already made, are 

 necessarv before a complete treatment of the subject can be 

 underl aken. 



