OF ARTS AND SCIENCES. 467 



narrow pods strictly erect, and the crowded very irregular somewhat 

 turgid seeds marginless. The position of the radicle is variable, and 

 may be accumbent or incumbent in seeds from the same pod. In an 

 attempt to reduce to order the American members of this genus it has 

 seemed necessary to propose the following new species, all belonging 

 to the section Turritis. 



Arabis Bolandeui. Biennial, more or less pubescent throughout 

 with soft stellate hairs, the solitary stem much branched, a foot or 

 two high : radical leaves not seen ; the cauline lanceolate, auriculate, 

 entire, 1 or 2 inches long: flowers small, rose-colored: pods mostly 

 divaricately spreading on pedicels a line or two long, glabrous, straight, 

 obtuse with a broad sessile stigma, 6 to 18 lines long, the valves 

 1-nerved to the middle : seeds orbicular to elliptical, narrowly winged, 

 somewhat in two rows. — Yosemite Valley or Mono Pass {Bola7ider); 

 mountains of Washington Territory (Brandegee) ; also collected by 

 Dr. Ton-ey, a more glabrous form, probably in the mountains of 

 California, but ticketed in his herbarium as from Colorado. 



Arabis pekennans. Perennial, with a usually branching and 

 somewhat woody base, roughly stellate-pubescent or sometimes gla- 

 brous above, about a foot high : lower leaves broadly spatulate to 

 narrowly oblanceolate, dentate or sinuate, the petioles sometimes cili- 

 ate, the cauline linear-oblong, auriculate, mostly entire : flowers small, 

 often pale : pods divaricately spreading or reflexed, usually curved, 

 glabrous, 1 or 2 inches long by a line broad or less, obtuse or acutish, 

 the small stigma sessile : seeds orbicular, very narrowly margined. — 

 Turritis patula, Gray, Ives's Rep. 6. A. arcuata and A. retrofracta, 

 "Watson, Bot. King Exp. 18, in part. Distributed by Pringle 

 (1881) under the name A. HolbceUii^ var. perennans. From northern 

 Nevada and Utah to Arizona and the San Bernardino Mountains in 

 California. 



Arabis Beckwithii. Resembling A. suhpinnatijida, biennial, 

 hoary with a fine dense stellate pubescence : stem erect, a span high : 

 leaves entire, an inch long or less, the radical oblanceolate, the cauline 

 lanceolate, auriculate : flowers rose-color, 3 to 6 lines long : pods gla- 

 brous (or slightly pubescent when young), spreading and arcuate, 

 2J inches long by a line wide, acutish, the stigma sessile : seeds 

 broadly elliptical. — Nevada (Quartz Mountains, Beckwlth ; near 

 Carson City, Watson ; Candelaria, Shockley) ; San Bernardino Moun- 

 tains, California (^Parish Brothers^ 1302). 



Arabis Lem>ioni. Perennial, low (a span high or less), glaucous, 

 hoary below with fine densely stellate pubescence, the stems several 



