36 Nelson and Kennedy — Plantae Montrosensis. 



Allied to E. aitemoplnlum Greene, but diflerent in the character of the 

 caudex, foliage, and color of the flowers. 



Eriogonum rosensis sp. nov. 



Perennial, acaulescent, woolly-tomentose, caudex branched and covered 

 with numerous (new and old) persistent leaves: leaves G-12 mm. long, 

 ovate, tapering to a petiole 4 mm. long, woolly-tomentose on both sides: 

 scapes 1-several from each branch of the caudex, rather stout, minutely 

 glandular-pubescent, 2-5 cm. high, each bearing a cluster of about 8 in- 

 volucres : involucres tomentose, S-lobed, 3 mm. long, each containing about 

 1() flowers ; the pedicels 3 miii. long: perianths yellow, sometimes slightly 

 tinged with red, 2 mm. long : lobes obovate, glabrous, with a peculiar 

 swelling at the apex of each lobe: filaments about 2 mm. long, villous be- 

 low : ovary glabrous, 3- winged. 



Allied to E. anemupldluin Greene: collected on the summit of Mount 

 Rose, Washoe County, Nevada, elevation 10,800 feet, August 17, 1905, No. 

 1180 (type), P. B. Kennedy. 



The plant forms dense, low, mats about 15 cm. across, growing where it 

 can find a little soil among the lava rocks. 



Arabis depauperata sp. nov. 



Perennial, about 8 cm. high in flower, considerably taller in mature 

 fruit : root branched 2-3 cm., below the surface of the ground into a num- 

 ber of long, slender, wiry rootlets : stems many, very slender, from a 

 much branched caudex ; stems and leaves covered with a minute, stellate, 

 pubescence ; the numerous lower leaves small and tufted at the base of the 

 stems, petioled, the upper cauline, sessile, 6-10 mm. long, ovate-lanceolate, 

 entire: racemes 3 cm. or less long, bearing minute purple flowers, 3 mm. 

 long; calyx lobes oblong, 2 mm. long; corolla lobes spatulate, rounded at 

 the apex, and attenutate towards the base, 3 mm. long : mature pods 3-6 

 cm. long and 2 mm. wide, glabrous, purplish, with minute gray dots, mostly 

 straight, though sometimes slightly curved ; pedicels 4-6 mm. long : seeds 

 flattish, orbicular, orange, 2 mm. wide, with an even yellowish-green very 

 narrow winged margin extending completely around the seed. 



Nearest to A . pUdy^permn Gray, but quite different in the character of 

 the whole plant, size of leaves, pods, seeds, etc. 



Summit of Mount Rose, Washoe County, Nevada, elevation 10,800 feet, 

 August 17, 1905, No. 1167 (type), P. B. Kennedy. 



Ribes Churchii sp. nov. 



Shrub 3-6 m. high, dense, unarmed ; old branches ash-gray, new ones 

 light brown: leaves densely viscid-glandular on both sides, 6-12 mm. 

 broad, sub-orbicular, 3-lobed, crenate: petioles 6-20 mm. long, glandular : 

 inflorescence 1-2-flowered, rarely 3-flowered ; peduncles 12 mm. long; 

 pedicels 1 mm. long or less: flowers subtended by 3 bracteoles which are 

 ovate, and entire, or occasionally 3-toothed at the apex ; calyx white, 



