Rydberg : Rocky Mountain flora 639 



Mertensia viridula sp. nov. 



Perennial with a cespitose rootstock ; stems slender, 2-3 dm. 

 high, glabrous ; leaves glabrous beneath, hispid-strigose above ; 

 the lower petioled, the upper sessile ; blades of the basal ones 

 spatulate, obtuse ; those of the stem-leaves acute, elliptic, or the 

 upper lanceolate ; pedicels strigose ; calyx glabrous, except the 

 base and the margins of the lobes ; these broadly lanceolate, about 

 2.5 mm. long; corolla blue; tube about 4 mm. long; throat and 

 limb of about the same length ; filaments broader than the anthers ; 

 nutlets muricate and somewhat irregularly ridged. 



This species resembles M. viridis A. Nels. closely in habit, but 

 the dilated conspicuous filaments associate it with M. linearifolia 

 and M. ovata, from which it is distinguished by the broader calyx- 

 lobes. It grows in the mountains at an altitude of 2700-3800 m. 



Colorado : North Cheyenne Canon, 1894, E. A. Bessey (type); 

 West Spanish Peak, 1900, Rydberg & Vre eland 5683. 



Mertensia Parryi sp. nov. 



Perennial with a cespitose rootstock ; stems about 2 dm. high, 

 glabrous; leaves glabrous beneath, hispidulous-strigose above, 

 only the basai ones petioled and spatulate ; stem-leaves sessile, 

 lanceolate or oblanceolate, about 5 cm. long ; inflorescence small 

 and short ; pedicels strigose ; calyx glabrous except the very 

 base and the ciliate margins of the lobes ; these narrowly linear- 

 lanceolate, about 3 mm. long ; tube of the blue corolla about 5 

 mm. long and about equaling the length of the throat and limb 

 together ; limb about 8 mm. wide ; filaments evident but short, 

 broader than the anthers. 



This species is nearest related to M. ovata Rydb., but differs 

 in the narrower leaves and the comparatively longer corolla- limb. 

 In M. ovata the tube is longer than the throat and limb together. 

 M. Parryi grows in the higher mountains. 



Colorado : Alpine ridges lying east of Middle Park, Parry 

 286 (type); Estes Park, 1903, Osterhout 2848 ; Cameron Pass, 

 1896, Baker ; Alpine Tunnel, 1897, Shear 3833. 



Mertensia perplexa sp. nov. 



Perennial with branched rootstock ; stem about 3 dm. high, 

 glabrous ; basal leaves spatulate, 4-10 cm. long, petioled ; stem- 

 leaves sessile ; the lower oblanceolate ; the upper ovate, glabrous 

 beneath, minutely hispidulous-strigose above ; pedicels minutely 



