78 LEAFLETS. 



Farewell Gap, at 10,600 feet in the mountains of southern 

 California, C. A. Purpus, 1897, his n. 5229>^. It has the 

 habit of the A. platysperma group, but with rather too much 

 stellate pubescence, and the pods also too narrow. 



Formerly every simple-stemmed western Arabis wearing the 

 aspect of a rather tall biennial, and having erect small petals 

 and long narrow straight pods, was named A. Holboellii. A 

 number of segregates from that medley have long since been 

 offered, and accepted, and others are here indicated. 



Arabis nemophh,a. Apparently biennial, the solitary stem 

 erect, simple, more than a foot high, firm but not stout, 

 unusually leafy up to the very short raceme ; herbage green, 

 with barely a glaucescent tinge : basal leaves 1 to 1 J^ inches 

 long, of oblong-lanceolate entire or remotely toothed limb and 

 rather narrow petiole, all thinly and minutely stellate but not in 

 the least hoary; cauline leaves Y^ to \% inches long, oblong, 

 acute, sagittate- auricled, glabrous : flowers few, small, white ; 

 sepals green, with few stellate hairs at summit; petals twice 

 as long, white or pinkish : pods straight, extremely narrow, 

 3 inches long, perfectly erect above short ascending pedicels : 

 seeds in one row, immature. 



Sequoia National Forest, Calif., July, 1908, Dr. Anstruther 

 Davidson ; specimens on sheet 612,692, U. S. Herb. 



Arabis interposita. Perennial, with stem xVi to 2 feet 

 high, rigidly erect from amid several suberect leafy offsets ; all 

 basal leaves 1 to 1/^ inches long, the narrowly ellipsoidal 

 entire blades and narrowly winged petioles of about equal 

 length, both faces substellate-canescent ; cauline leaves oblong, 

 sessile, sagittate-auriculate, these and the stem less stellate : 

 flowers not seen : pods narrowly linear, straight, erect, 2 

 inches long; hardly a line wide; seeds thick, oval, widely 

 winged at the upper end, narrowly so up and down the sides. 



A good fruiting specimen on sheet n. 444,616 of U. S. 

 Herb., mounted between two specimens of ^. Drummondii, 

 all as collected by W. C. Cusick, in 1902, somewhere in south- 



