652 RypBERG: Rocky MOUNTAIN FLORA 
- Oligoneuron canescens sp. nov. 
Solidago rigida humilis Porter Syn. Fl. Colo. 63, 1874. Not 
S. humilts Niall. 
Stout perennial ; densely yellowish-canescent throughout ; stem 
simple up to the inflorescence, 5-7 dm. high; basal leaves long- 
petioled ; blades oval, 7-12 cm. long, thick, canescent on both 
sides, in age scabrous, ‘distantly crenutate with small callous teeth ; 
upper stem-leaves oval, sessile, entire or sinuate, crenulate, very 
densely canescent ; inflorescence corymbiform but much congested ; 
heads about 1 cm. high; bracts oblong, striate, canescent ; rays 
3-4 mm. long, less than 1 cm. wide, light yellow ; achenes slightly 
hairy above, otherwise glabrous. 
This differs from O. rigidum Small (Solidago rigida L.) in the 
shorter leaves, the smaller and denser inflorescence, the dense 
yellowish-canescent pubescence, and the achenes which are appar- 
ently always slightly hairy above. It grows on prairies and in 
valleys at an altitude of g00-1800 m. 
Wyominc : Buffalo, 1900, 7zeedy 3717 (type); Dayton, 
1899, Ziveedy 2077 ; Devil's Tower, 1899, LZ. W. Carter. 
Nepraska: Plummer Ford, Dismal River, 1892, Aydberg 
1666. 
SoutH Dakota: Custer, 1892, Rydberg 7609. 
Nortu Dakota: Tower, 1891, Wright. 
‘Chrysothamnus patens sp. nov. 
Shrubby, half a meter or so high; stems white-tomentulose 
when young, soon glabrous and yellowish green; leaves 6-8 cm. 
long, about. 1 mm. broad, soon glabrous, spreading or even 
reflexed ; bracts lanceolate, acute, carinate, glabrous, in 5 vertical 
rows of about 3 each ; corolla-lobes about 1 mm. long, lanceolate, 
acute, in age more or less spreading; achenes strigose. 
This is closely related to C. graveolens, but differs in the nar- 
row, spreading leaves. It grows on dry hills at an altitude of 
1300-2100 m. 
CoLorabo: 1873, Wolf 452 (type); Grand Junction, 1901, 
Underwood & Selby 4986; 1900, Stokes; Manitou, 1900, 
Clements ; Alamosa, 1896, Shear 3753; Zola, 1901, Baker 668. 
v Chrysothamnus Newberryi sp. nov. 
rubby below ; stem white-tomentose, rather slender ; leaves 
erect, linear-filiform, I-nerved, slightly tomentulose when young ; 
