1 62 The Ottawa Naturalist. [December 



Canada. Collected on tlic banks of the Columbia by Douglas 

 and Scouler, and in many parts of Oregon and Washington in 

 recent years, but never on Vancouver Island or the B. C. coast, 

 where it doubtless occurs. 

 Dentaria Califormca, Nutt. 



Cardamine angulafa, Macoun, Cat. Can. Plants, vol, i, p. 41. 



Dentaria tenella, Macoun, Cat. Can. Plants, vol. I, p. 39. 



Common on Vancouver Island. 

 Dentaria geminata, Wais. 



Rich woods, Burnaby Lake, near New Westminster, B.C., 

 1889. (/. M. Macoun) New to Canada. Agrees in every 

 respect with specimens collected in the upper valley of the 

 Nesqually River, Washington, by Mr. O. J. Allen. 



Arabis drepanoloba, Greene, Pittonia, vol. in, p. 306. 



Prennial, the several stout decumbent stems 8 to 12 inches 

 high ; herbage seemingly glabrous and glabrous, but the small 

 oblanceolate lowest leaves sparsely stellate hairy ; the oblong 

 sessile auriculate cauline ones like all the remaining parts of the 

 plant glabrous ; corollas red, y^ inch long or more ; fruiting 

 raceme 2-5 inches long, the broad spreading and slightly falcate- 

 recurved pods 2 inches long including the short pedicel, about 

 i^ lines wide, abruptly acutish, the stigma sessile ; valves with 

 with a manifest nerve at base only ; seeds in two rows under 

 each valve, flat, obovoid, narrowly winged. 



Collected in August, i89i,by Prof. John Macoun at Devil's 

 Lake, Banff, Alberta, and distributed as A. Lemmoni, to which 

 it is indeed related, yet easily distinguishable by its larger 

 dimensions, much less pubescent lower leaves, and especially 

 by its pods, which are twice as broad and with two rows of seeds. 



Arabis Nuttallii, Robinson. 



High dry slopes of mountains at Crow's Nest Pas.s, Rocky 

 Mountains, alt. 7000 ft., Aug. 2nd, 1897. Herb. No. 18,162. 

 {John Macoun.) New to Canada. The habitat of this plant is 

 stated by Dr. Robinson to be " chiefly on low grounds in [moun- 

 tain] valleys." The habitat as given by Nuttall "lofty dry hills,'* 



