1899] Macoun — On some Ottawa Violets. 185 



petals broad, obtuse, the odd one well expanded, nearly equal- 

 ling the others, truncate or retuse, only the two laterals bearded 

 at base with clavellate white hairs ; earliest apetalous flowers on 

 slender peduncles equalling the leaves, but all the later ones short 

 peduncled and almost or altogether subterranean ; capsule very 

 short and thick, roundish-obovate. 



Type specimens were collected in the wet meadow between 

 the Rockclifife road and Governor's Bay, Ottawa. It grows on 

 tussocks with V. blanda and except in May cannot be found 

 unless the exact locality be known, grasses and other flowers 

 hiding the smaller plant from view. Distributed as No. 18,565. 

 Specimens of this species have been sent me from Charlottetown, 

 P.E.I., by Mr. L. W. Watson. 



Viola cucullata, Ait. 



(Plate V.) 



This is the commonest blue violet in the vicinity of Ottawa, 

 always growing on very wet ground, generally by rivulets and 

 small creeks. Dr. Greene's note on this species (Pittonia, vol. Ill, 

 pp. 143-4) includes all its important distinguishing characters 

 and is here reproduced in part. 



This is a very glabrous plant, of tender and succulent herb- 

 age, decidedly cucullate leaves, light green in colour, flowers 

 very pale blue, the petals with a spot of darker violet just above 

 the white basal part or claw. The cleistogamous flowers are 

 borne on greatly elongated very slender peduncles which are 

 strictly erect, both the growing and full grown ovaries being a 

 half- foot or more above ground among the leaf-blades. The 

 capsules are very long and quite prismatic, z>., of equal thickness 

 from one end to the other, and distinctly though obtusely tri- 

 gonous. 



Viola cuspidata, Greene, Pittonia, vol. Ill, p. 314. 



(Plate IV and Plate HI, Fig. 5.) 



Acaulescent, low, at time of petaliferous flowering 3 or 4 

 inches high ; leaves round-cordate, cucullate, crenate-serrate 



