158 LEAFLETS. 



I was promptly favored with two sheets of specimens of the 

 same new species, collected by Dr. lyunell himself at different 

 stations in northern North Dakota ; one of them from Butte, 

 24 July, 1910, the other sheet from low ground near I,eeds, 

 in 1904. 



The Butte specimens are like those from the Canadian side 

 of the boundary in that they are technically herbaceous. 

 However hard, wiry and wood-like they are as to texture, the 

 whole comes up from under the ground, flowers, fruits as an 

 herb does, and then dies down. The specimens from Prof. 

 Macoun are so gathered as to demonstrate this less clearly. 

 One of the I^eeds specimens has two flowering branches aris- 

 ing from a point three inches above the ground, proving that 

 in that place the plant may be partly suffrutescent. The foli- 

 age, flowers and fruits of this are more like those of genuine 

 Old World S. salidfolia than anything else that has been 

 found on this continent. 



Arabis inamoena. I^oosely tufted perennial 8 to 12 inches 

 high, the sublignescent basal branches not stout, naked, 

 spreading or ascending : leafy and floriferous stems upright, 

 sparsely leafy, branched and loosely floriferous from below the 

 middle: leaves all very thin, large for the plant, green, 

 thinly pubescent with short dendritic hairs, the basal 1 inch 

 long or more including the long slender petiole, the limb oval, 

 entire or with few teeth, cauline oval to oblong, 2 inches long, 

 obtuse or acutish, short-petiolate or else cuneately tapering to 

 the base, not auricled : flowers small, sepals equal obtuse, 

 dendritic-hairy, petals not greatly surpassing them, erect, of 

 a dull greenish white : pods thin, flat, glabrous, 2 inches 

 long or more, flat, acute, subfalcately curved or nearly 

 straight : seeds in one row and rather remote, suborbicular, 

 broadly winged. 



Collected in Inyo Co., California, at I^ake Sabrina, in July, 

 1911, by Dr. A. Davidson, his n. 2729. The plant is akin to 

 A. repanda inhabiting mountain districts at low elevations 



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