Neues aus: New Manual ot Botany of the Central Rocky Mountains. 483 
solitary, strict, 6—10 dm high, very leafy up to the raceme: basal leaves 
few and early deciduous the second season; cauline entire or remotely 
denticulate, oblanceolate, and petioled below, passing into lanceolate- 
linear auriculate forms above: flowers large, from deep purple to almost 
white: petals twice as long as the pubescent sepals; the buds erect but 
drooping in anthesis: siliques linear, 5—8 cm long, divaricate, drooping, 
or variously twisted, on long ciliate pedicels. (A. elegans A. Nels. Bot. 
Gaz. XXX: 192, 1900.) — Yellowstone Park. 
6. Arabis caduca A. Nelson, l. c., p. 229. — Biennial, maturing early 
the second season and then quickly disintegrating: stems solitary from 
a taproot, erect, thick but brittle, branched above, hirsute with branched 
hairs at base only: basal leaves rosulate, early caducous, oblanceolate, 
petioled, 2—3 cm long, rough with a branched hirsute pubescence; 
cauline oblong or broadly linear, sessile by an auricled base, glabrous: 
flowers small; racemes becoming very long, rather crowded: siliques 
l-nerved to the middle, broadly linear, straight, acute, glabrous, 5—7 cm 
long, pendent on reflexed pedicels, or more usually on pedicels sharply 
refracted at their base: seeds in 2 rows. A. Holboellii in part. — Sandy 
slopes and plains; southern Wyoming, south and west to Utah. 
7. Sieversia scapoidea A. Nelson, l. c., p. 263. — Glabrous (obscurely 
puberulent under a strong lens): leaves rosulate-spreading from the 
crowns of a more or less branched woody rootstock, interruptedly pin- 
nate, 5—10 cm long; leaflets obovate, 3-cleft into oblong, subacute lobes, 
not crowded: stems scapose, few, erect, strictly 1-flowered, 14—20 cm 
high; the bract-like leaves entire, linear, 15—20 mm long, the rather 
large stipules long-adnate; flowers large, 2 cm broad: calyx softly ` 
pubescent, its triangular-lanceolate lobes longer than its tube; the bract- 
lets minute, nearly linear: petals obovate-orbicular, pale yellow, twice as 
long as the calyx; achene tapering gradually into the style, long-hirsute 
as is also the thickened base of the style. — Utah. 
Drosace A. Nelson, nov. gen. l. c., p. 374. — Perennials with 
depressed-caespitose branched caudex. Leaves rosulate-imbricated on 
the crowns of the caudex. Scapes (peduncles) solitary from each of the 
several crowns, few to several-flowered. Flowers in a subcapitate umbel. 
Coralla white or yellowish. Capsule few-seeded. 
8. Drosace carinata A. Nelson, I. c., p. 374. — A depressed peren- 
nial, the short branches of the caudex terminating in a close rosulate 
cluster of leaves: leaves small, usually less than 1 cm long, mostly 
oblong, subacute, white-ciliate, somewhat keeled: scape and umbel mo- 
derately ciliate-hirsute: calyx-tube campanulate, as long as the lanceolate 
lobes: corolla-lobes obovate, as long as the tube: stamens near the 
middle of the tube: capsule globose. Androsace Chamaejasme. _ (Probably 
not A. Chamaejasme Willd. Sp. Pl. 1: 799; Douglasia Johnstonu A. Nels, 
Proc. Biol. Soc. Wash. XX: 57, 1907.) — Colorado and far northward 
in the Rocky Mountains. 31* 
