222, ERYTHEA. 
broadly obovate, coarsely and incisely serrate all around ex- 
cept at and near the acutish base, those of vigorous sterile 
shoots even somewhat lobed and the lobes with a serrate 
tooth or two: petals unknown: fruit nearly as in the type, 
but calyx-segments narrower. 
North sides of desert hills near Humboldt Wells, in eastern 
Nevada, July, 1893. The leaf-outline in this shrub is suffi- 
ciently characteristic to indicate for it specific rank, and 
both the habit and habitat are quite peculiar for an Amel- 
anchier. If a mere variety, the hue and texture of the 
foliage determine its place to be under A. pallida rather 
than A. alnifolia. 
Saxifraga umbellulata. Perennial, fibrous-rooted, the 
crown proliferous by numerous sessile bulblets: leaves all 
radical, dark-reddish beneath, 4 to 7 inch long, the blade 
from rhombic-ovate and -obovate to spatulate-oblong, taper- 
ing toa broadly winged petiole of nearly or quite its own 
length, surface glabrous, margin dentate or entire: scape 
simple, 3 to 5 inches high, glandular-pubescent: flowers in @ 
terminal almost flat-topped cluster made up of sessile 3- 
flowered umbellules: calyx-lobes as long as the tube, obtuse, 
ascending: petals spatulate-obovate, obtuse, white or pinkish: 
filaments stout, linear: ovary neither flattened above nor 
surrounded by any disk: carpels stout, recurved. 
On high and dry gravelly spots at 7000 to 8000 feet alti- 
tude in the Sierra Nevada of California, from near Donner 
Lake southward at least to Mt. Dana; usually referred to S. 
nivalis, but entirely distinct in vegetative as well as floral 
characters. 
Saxifraga nidifica. Near S. integrifolia, but crown and 
roots embedded in a dense subglobose mass of small bulb- 
lets: leaves ovate or obovate, entire or merely denticulate, a0 
inch long, on dilated petioles rather shorter: scape 8 to 12 
inches high, stoutish, glandular-hirsute: cymes several- 
flowered and pedicellate, forming a thyrsoid panicle toward 
the summit: calyx-segments ascending, oblong-ovoid, acutish 
