24 Rydberg : Studies on the Rocky Mountain Flora 



seen under that name belong to E. sitbtrinervis Rydb., which is its 

 nearest relative. From this it differs in the dense grayish pubes- 

 cence, the narrower stem-leaves, which are not 3-ribbed, and the 

 lower habit. E. incanescens grows in rocky places at an altitude 

 of about 3000 m. 



Colorado: West Spanish Peak, 1900, Rydberg & Vreeland, 



54-15- 



^Erigeron viscidus sp. no v. 



A 



low cespitose perennial. Stems ascending, a little over 1 

 dm. high, more or less hirsute and glandular-puberulent, especially 

 above ; leaves 3-5 cm. long, oblanceolate, dark green, sparingly 

 hirsute and ciliate on the entire margins : heads few : disk about 1 

 cm. high and 1 5 mm. broad : bracts very numerous, subequal in 

 one series, narrowly linear, fuscous, acuminate, glandular-puberu- 

 lent, but not hirsute : rays very numerous, pale blue, about 8 mm. 

 long and .5 mm. wide. 



This species is intermediate between E. glandidosus and E. 

 macranthus. It has the habit of the former, although larger, and 

 the large heads and numerous narrow rays of the latter. It grows 

 in wet ground, at an altitude of about 2700 m. 



Colorado: Near the Gray-Back Mining Camps, 1900, Ryd- 



& 



^Valeriana acutiloba sp. nov. 



A bright green plant with horizontal or ascending rootstock 

 and polygamo-dioecious flowers. Fertile plant 4-5 dm. high : 



basal leaves entire with a 



5-7 cm 



long ; blade spatulate or obovate, acute : stem-leaves usually 3 

 pairs, pinnately divided ; lateral divisions lanceolate to linear, long- 

 acuminate ; the terminal one large, oblanceolate or of the upper- 

 most very small leaves linear-lanceolate, entire or saliently toothed : 



cyme dense, contracted, 2—5 



gland- 



ular-puberulent : bracts linear subulate, about 1 cm. long : flowers 

 perfect; corolla funnelform, about 4.5 mm. long; tube proper 

 about 1 mm.; fruit broadly ovate, about 4 mm. long : pappus 

 about 7 mm. : staminate plant lower, 3-4 dm. high, with more 

 sterile shoots, which have much longer leaves : stem-leaves usually 

 only 2 pairs, less divided, with only 1-2 pairs of lateral divisions : 

 cymes denser, flowers all or nearly all staminate : their corollas 

 larger, 5-6 mm. long, more oblique ; the limbs about 5 mm. wide. 



This species has the dense cyme of V. capitala ; but the plant 



is taller, the corolla shorter and is easily distinguished from all its 



/ 



