1899] Macoun— On some Ottawa Violets. 183 



of the five species here recorded as growing in the vicinity of 

 Ottawa, and my only excuse for reprinting here the descriptions 

 already pubHshed by Dr. Greene is that they and the figures of 

 the plants described may be found under one cover. 



Viola SEPTENTRIONALIS, Greene, Pittonia, vol. Ill, p. 334. 



(Plate H, Fig. 3.) 

 Acaulescent, gregarious, low, 4 to 5 inches high at petali- 

 ferous flowering ; herbage rather light green, the leaves and 

 petioles sparsely clothed with stiff straight spreading hairs, these 

 most numerous beneath and along the veins; leaves from reniform 

 in the lowest to round-cordate, strongly cucuUate when young, 

 lightly and very regularly crenate, all obtuse ; peduncles (about 

 equalling the leaves) bibracteolate near the middle ; sepals small 

 for the size of the flower, with prominent truncate auricles, the 

 whole margin finely and closely ciliate ; corolla pale violet, 

 rather large, 9 or 10 lines long and broad, all the petals broad, 

 usually all obcordate, notched at the broad apex, the upper pair 

 sometimes merely obtuse ; the odd or lower one amply ex- 

 panded and as long and as broad as the others, this and the pair 

 next to it hairy at base (on the claw), and sparingly so on the 

 blade ; apetalous flowers aerial, but on very short slender and 

 horizontal peduncles, their pods very short and nearly oval. 



Rich soil in thickets and open woods, Billings's Bush, south- 

 east of Billings's Bridge, Ottawa; in full petaliferous flower, loth 

 May, 1898, and in fruit from the apetalous flowers three weeks 

 later. Distributed as Geol. Survey of Canada Herb. No. 18,561. 

 Described from specimens collected at above locality but not 

 rare in suitable situations elsewhere near Ottawa. 



According to Dr. Greene its southern and eastern U. S. 

 homologue is the plant called by him V. obliqua, Pittonia, vol. 

 Ill, p. 142 ; " but it is also allied and by its foliage more nearly 

 to V. cuspidata of the far-western lake and prairie regions, and 

 is distinct enough from either by a redundancy of characters. If 

 it has the hairiness of V. aispidata it has quite another quality 



