125 



133c. Heads more or less uniformly distributed along the length of 

 the branches, forming a cylindrical or pyramidal inflorescence, 

 never flat-topped 146. 



134a. Stem and both sides of the leaves more or less pubescent 



or rough (410 dm. high) 135. 

 134b. Stem and both sides of the leaves essentially smooth or 



with very short hairs (310 dm. high) 136. 



135a. Rays white Goldenrod, Solidago bicolor. 



135b. Rays yellow Goldenrod, Solidago hispida. 



136a. Basal leaves abruptly narrowed to winged petioles 137. 

 136b. Basal leaves not abruptly narrowed to winged petioles 

 138. 



137a. Involucre 2 5 mm. long Goldenrod, Solidago latifolia. 



137b. Involucre 8 12 mm. long Goldenrod, Solidago macrophylla. 



138a. Lower leaves broadly oval, O'btuse, thickish, crenate; 

 achenes glabrous Goldenrod, Solidago erecta. 



138b. Lower leaves lanceolate, acuminate, thin, sharply serrate; 

 achenes hairy 139. 



139a. Stem usually simple; heads few in very small clusters 



Goldenrod, Solidago caesia Yar. axillaris. 

 139b. Stem usually diffusely branched; heads numero'US 



Goldenrod, Solidago caesia. 



140a. Lower leaves ovate, oblong, or oval, pinnately veined (5 15 



dm. high) 141. 

 140b. Lower leaves linear-lanceolate, 3 5-veined (3 12 dm. 



high) 142. 



141a. Stem and leaves rough-hairy Goldenrod, Solidago rigida. 



141b. Stem and leaves smooth Goldenrod, Solidago ohioensis. 



142a. Heads very few in a small cluster; leaves few and scattered 



Goldenrod, Solidago houghtonii. 



142b. Heads very many, in a large cluster; stem very leafy 143. 



143a. Leaves hairy Goldenrod, Solidago graminifolia Yar. nuttallii. 



143b. Leaves smooth 144. 



144a. Leaves folded, 820 mm. wide Goldenrod, Solidago riddellii. 



144b. Leaves flat, 1 8 mm. wide 145. 



145a. Leaves 4 8 mm. wide, distinctly 3 5-ribbed 



Goldenrod, Solidago graminifolia. 

 145b. Leaves 1 4 mm. wide, usually with 1 midvein 



Goldenrod, Solidago tenuifolia, 



146a. Only 2 5 stem-leaves below the inflorescence (1 3 dm. 

 high) Goldenrod, Solidago cutleri 



146b. Stem-leaves numerous 147. 



