650 Rydberg : Rocky Mountain flora 



late, indistinctly if at all triple-nerved, rather thin, obtuse, 5-10 

 cm. long, entire or crenate above, glabrous except the scabrous 

 margin ; lower stem-leaves similar ; upper stem-leaves narrowly lan- 

 ceolate, sessile ; inflorescence paniculate, but rather narrow, with 

 numerous heads ; branches nearly erect ; heads about 8 mm. high ; 

 bracts narrowly linear-lanceolate, acute, ciliolate on the margin ; 

 disk about 8 mm. wide; rays numerous, about 4 mm. long and 

 nearly i mm. wide ; achenes sparingly strigose. 



This is nearest related to the preceding, but taller and more 

 slender, with narrower leaves and glabrous stem. It approaches 

 the 5. scrotina group but has neither triple-nerved leaves nor 

 secund branches. It grows in the mountains of Colorado and 

 southern Wyoming at an altitude of 2500-3300 m. 



Colorado: North Park, 1899, Osterhout 4. {S.y^€)\ Berthoud 

 Pass, 1903, Ttveedy sS^j. 



Wyoming: Copperton, 1901, Tweedy 400^. 



Solidago radulina sp. no v. 



Perennial ; stem 3-4 dm. high, grayish-puberulent ; basal 

 and lower cauline leaves spatulate, obtuse, crenate at the apex, 

 finely puberulent ; upper stem-leaves elliptic or spatulate, acute ; 

 inflorescence narrow and elongated, paniculate ; heads about 4 

 mm. high ; bracts oblong, obtuse, or the inner linear, ciliolate on 

 the margin ; rays about 2.5 mm. long, i mm. wide ; achenes hir- 

 sutulous. 



This species is intermediate between 5. nana and ^. pidcher- 

 rima, but differs from the former in the taller habit and the elon- 

 gated inflorescence and from the latter in the broader and shorter 

 stem-leaves. In leaf-form it resembles somewhat 5. radula, but is 

 a smaller plant, with smaller leaves and narrow inflorescence, the 

 branches of which are short and only somewhat secund. The 

 type grew at an altitude of 1800 m. 



Utah: Cottonwood Canon, 1869, ]Vatson 556" (type in herb. 

 Columbia University). 



Colorado: Meadow Park, 1895, Shear jo^g. 



Solidago serra sp. nov. 



Perennial with a rootstock ; stem simple up to the inflorescence, 

 about 6 dm. high, more or less pubescent especially above ; leaves 

 lanceolate, about 8 cm. long, acuminate, sharply toothed, rather 



