RypDBERG: Rocky MOouNTAIN FLORA 557 
‘ Arabis oblanceolata sp. nov. 
"9 Perennial, somewhat branched at the base, 3 dm. or more 
high; basal leaves petioled, sparingly stellate-pubescent, 3-10 
cm. long; blades oblanceolate, acute, entire; stem-leaves sessile, 
lanceolate, sagittate-auricled at the base ; sepals oblong, acute, 
3-4 mm. long, white-hairy near the apex; petals dark reddish- 
purple, 7-8 mm. long, spatulate with a long claw; pedicels in 
fruit ascending, about 12 mm. long; pods ascending, about 5 cm. 
long and 2 mm. wide, glabrous ; seeds in 2 rows; style none. 
This is perhaps nearest related to A. Crandallii Robinson, but 
is a larger plant, less stellate, with much larger basal leaves and 
pods, and the flowers are much darker. It grows at an altitude of 
about 3,000 m. 
CoLorapo: Valley Spur, 1901, Underwood & Selby 454. 
~Arabis Selbyi sp. nov. 
Perennial, with a basal rosette of leaves; basal leaves ob- 
lanceolate, 5~10 cm. long, short-petioled, acute, sinuate-dentic- 
ulate, green but stellate on both sides, not ciliate; stems 4~5 
dm. high, branched ; stem-leaves linear-lanceolate, sagittate at the 
base ; racemes long and lax; sepals linear, green, obtuse, about 
3 mm. long, sparingly stellate ; petals red-purple, narrowly ob- 
lanceolate, long-clawed ; fruiting pedicels 3-4 mm. long, di- 
vergent; pods divergent, about 3 cm. long and 2 mm. wide, 
obtuse at both ends ; style obsolete; seeds in 2 rows. 
This species is perhaps nearest related to A. /ignifera and A. 
br achycarpa. ‘From the first it differs in the large, denticulate 
basal leaves, the stouter branched stem and the narrow dark 
petals. The latter has hispid ciliate as well as stellate leaves. 
A. Selbyi grows in caiions and neighboring meadows at an altitude 
of 2,300—2,800 m. 
Cotorapo: West of Ouray, 1901, Underwood & Selby 207. 
’ Erysimum oblanceolatum sp. nov. 
Biennial ; stem 4-6 dm. high, strigose, rather simple ; leaves 
Narrowly oblanceolate, 5-12 cm. long, entire or sinuate dentate ; 
the lower petioled, sparingly strigose ; racemes elongated ; sepals 
linear, about 6 mm. long, about equaling the claw of the light yel- 
low petals ; blades of the latter broadly spatulate or almost orbi- 
cular; the whole length of the petals about 15 mm., fruiting pedi- 
cels about 8 mm. long, ascending or spreading ; pod tetragonal, 
ascending, about 8 cm. long, almost straight, not twisted, about 
1.5 mm. thick; style about 1 mm. long. 
