638 RYDBERG: RocKy MOUNTAIN FLORA 
‘Mertensia picta sp. nov. 
Perennial, perfectly glabrous, except the hispidulous-ciliate 
margins of the leaves and calyx-lobes ; stem 3—5 dm. high, pale 
and somewhat bluish below, more or less angled; lower leaves 
petioled ; blades oval or elliptic-ovate, 5-g cm. long, obtuse or 
acutish, rounded or somewhat truncate at the base, finely pustu- 
late but not hairy on the surfaces, thin ; upper leaves lanceolate or 
ovate-lanceolate and subsessile ; inflorescence leafy and with short 
branches ; pedicels and calyx more or less pustulate ; calyx-lobes 
linear-oblong, obtuse, in fruit nearly 2 mm. long, the back with 
a thickened pale spot; corolla blue; its tube 6-7 mm. long and 
2-3 mm. wide; throat and limb together 5-6 mm. long, the latter 
about 5 mm. wide; filaments dilated, about 2 mm. long and wider 
than the anthers ; nutlets ovate in outline, strongly and irregularly 
reticulate-crested on the back. 
This is closely related to MZ. ciliata but distinguished by the 
pale-spotted and thickened calyx-lobes. 
Cotorapo: Estes Park, Larimer County, 1903, Osterhout 
2823 (type); Mount Baldy, 1901, Clements 288. 
’ Mertensia polyphylla platensis var. nov. 
Like the species, but the calyx-lobes linear, fully 3 mm. long ; 
basal leaves large; blades about 1 dm. long, cordate at the base 
and cuspidate at the apex. 
Along streams at an altitude of 3000 m. 
CoLtorapo: Bob Creek, La Plata Mountains, 1898, Baker, 
Earle & Tracy 780 (in part). 
v Mertensia alba sp. nov. 
Perennial ; stem pale, 6-8 dm. high, more or less branched ; 
lower leaves petioled, upper sessile ; blades lanceolate or elliptic- 
lanceolate, acute or acuminate at both ends, glabrous beneath, his- 
pidulous-strigose above and on the margins; pedicels and calyx 
strigose ; lobes linear-lanceolate, acute, about half as long as the 
tube of the white corolla; corolla-tube about 8 mm. long, and 4 
mm. wide ; throat and limb together of about the same length ; 
the latter 8-10 mm. wide; nutlets irregularly crested-tuberculated, 
and finely pubescent. 
This is a species of the M/. paniculata group and nearest related 
to M. pratensis, but it lacks the dense white pubescence of the 
calyx characterizing that species and the corolla in all specimens 
seen is white. 
CoLorapo: La Plata River, 1898, Baker, Earle & Tracy 825. 
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