70 LEAFLETS. 



inches high and floriferous almost subumbellately at summit 

 only: lowest leaves in a small rosulate tuft, less than an inch 

 long, obovate to oblanceolate, entire or with a coarse tooth or 

 two, the upper face sparsely, the margins more closely, beset 

 with white straight hispid hairs, the bases of the flowering 

 stems similarly invested and quite densely so ; cauline leaves 

 few and sparse, oval or oblong, sessile, hispidulous-hairy in 

 a less degree than the basal : raceme few-flowered and the 

 flowers all near the summit ; calyx purple, the sepals with a 

 few bristles at tip ; petals rich purple, 4 lines long ; young 

 siliques erect, rather short, on slender pedicels. 



Mountains of southwestern Oregon, and apparently rather 

 local ; first collected by Howell, near Waldo, in 1884, and 

 distributed for A . furcata ; then gathered twenty years later 

 (in 1904) by C. V. Piper in the same general region. 



The second species here presented, though the specimens 

 are past flowering, is readily seen to be of that well-marked 

 broad-petalled group of which A. pulchra of Jones is typical. 

 All of them belong to the desert regions of the Great Basin. 



Arabis nardina. Perennial, younger plants simple, older 

 ones tufted, 4 to 7 inches high, the stem and all foliage very- 

 hoary with a minute and dense stellate tomentum ; basal leaves 

 forming a tuft, but upright rather than rosulate, oblanceolate, 

 obtuse, entire, j4 to 1 inch long, the cauline oblong-linear, % 

 to ^ inch long, sessile, obscurely auricled : pedicels of the 

 short raceme, and also the calyx stellate-hoary like the foliage : 

 corolla unknown : pods few, straight, erect or ascending on 

 slender pedicels, about 2 inches long, 2 lines wide, abruptly 

 acutish, glabrous, marked with a strong median nerve ; seeds 

 in two rows, suborbicular, rather broadly winged all around. 



This is known only as collected in the Panamint Mountains, 

 on the Death Valley Expedition by Coville and Funston, 20 

 May, 1891 ; their n. 776, and not listed in the Report. The 

 label once bore the name, in Sereno Watson's handwriting, of 

 Arabis platysperma, but the specific name was erased, evidently 



