Genus 22.] 



THISTLE FAMILY. 



345 



41. Solidago Radula Nutt. Western 

 Rough Golden-rod. (Fig. 37 11.) 



Solidago Radula Nutt. Journ. Acad. Phila. 7: 102. 1834. 



Stem rough-pubescent, rather slender, i-3 high. 

 Leaves thick, green, rough on both sides, the lower 

 oblanceolate or spatulate, dentate-crenate, obtuse or 

 acutish, petioled, 3 / -S / long, 6 // -2o // wide, obscurely 

 3-nerved, the upper smaller, oblanceolate, entire or 

 nearly so, sessile, distinctly 3-nerved, the upper- 

 most very small; heads 2 // -3 // high, secund on the 

 short, usually somewhat recurved branches of the 

 dense, often one-sided panicle; bracts of the invo- 

 lucre oblong or linear-oblong, obtuse; rays 3-7, 

 very short; achenes minutely pubescent. 



In dry soil, Illinois to Missouri, Louisiana and 

 Texas. Aug. -Sept. 



43. Solidago rigida L,. Stiff or 

 Hard-leaved Golden-rod. (Fig. 37 13. ) 

 Solidago rigida L. Sp. PI. 880. 1753. 



Stem stout, simple, or branched above, 

 densely and finely rough-pubescent, hoary, i- 

 5 high. Leaves thick, rigid, ovate to oblong, 

 pinnately veined, often obtuse,rough on both 

 sides, the upper sessile, clasping, and rounded 

 or sometimes narrowed at the base, i / -2 / 

 long, mostly entire ; lower and basal leaves 

 long-petioled, sometimes i long and 3 / wide, 

 entire or serrulate; heads 4.' '-5" high, many- 

 flowered, in a terminal dense corymbose 

 cyme, the clusters sometimes slightly secund ; 

 involucre broadly campanulate, its bracts ob- 

 long, obtuse, the outer pubescent; rays 6-10, 

 large; achenes glabrous, 10-15-nerved. 



In dry sandy, gravelly or rocky soil, Ontario 

 to the Northwest Territory, south to Georgia, 

 Texas and Colorado. Aug. -Oct. 



42. Solidago Drummondii T. & G. 



Drummond's Golden-rod. (Fig. 3712.) 



Solidago Drummondii T. & G. Fl. N. A. 2: 217. 



1841. 



Stem rather slender, i-3 high, finely soft- 

 pubescent. Leaves rather thin, broadly ovate 

 or oval, glabrous or nearly so above, finely, 

 but sometimes sparingly pubescent, or rough- 

 ish beneath, sharply serrate, acute at the 

 apex, narrowed at the base, 3-nerved and pin- 

 nately veined, petioled, or the upper sessile, 

 the larger 3 / -4 / long, \%f-i r wide; heads 2"- 

 iy 2 " high, secund on the usually few, spread- 

 ing or recurving branches of the panicle ; bract- 

 like upper leaves obtuse, or acute, entire; rays 

 4-6, conspicuous ; bracts of the involucre ob- 

 long-lanceolate, obtuse; achenes pubescent. 



In rocky soil, Illinois to Louisiana and Mis- 

 souri. Sept. -Oct. 



