286 A. Nelson et P. B. Kennedy. 
minutely glandular-pubescent, 2—5 cm high, each bearing a cluster of 
about 8 involucres: involucres tomentose, 8-lobed. 3 mm long, each 
containing about 16 flowers; the pedicels 3 mm 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 below: ovary glabrous, 3-winged. 
Allied to E. anemophilum 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. 
3. Arabis depauperata A. Nelson et P. B. Kennedy, |. c., p. 36. 
Perennial, about 8 em high in flower, considerably taller in mature 
fruit: root branched 2—3 cm below the surface of the ground into a 
number 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 attenuate 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. platysperma 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. 
4. Ribes Churchii A. Nelson et P. B. Kennedy, l. c., p. 36. 
. 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, 
shading to pink, 6—10 mm long, sparsely beset with gland-tipped, hairs, 
its lobes ovate, obtuse, reflexed, 2 mm long; petals deltoid-reniform, 
1 mm long; stamens equalling the petals: berry viscid, red, not juicy, 
insipid, 10—14 seeded, ripening in September. 
Type collected at the base of the Sierra Club monument at tbe 
summit of Mount Rose, Washoe County, Nevada: elevation 10,800 feet, 
being No. 1160, August 17, 1905, P. B. Kennedy. 
Allied to R. cereum Dougl. but much smaller in regard to size of 
bush, leaves, and flowers, and much more viscid. The branches are 
