GENUS 22. 



THISTLE FAMILY. 



40. Solidago Gattmgeri Chapm. Gattin- 

 ger's Golden-rod. Fig. 4252. 



Solidago Gattingeri Chapm. ; A. Gray, Syn. Fl. i : 

 Part 2, 156. 1884. 



Stem slender, 2-3 high, branched at the in- 

 florescence, glabrous throughout. Leaves firm, 

 glabrous beneath, rough above, ciliolate, the lower 

 and basal ones oblanceolate or spatulate, acutish, 

 3'-6' long, 6"-io" wide, serrate with low distant 

 teeth, narrowed into margined petioles; upper 

 leaves abruptly smaller, linear-oblong or oblan- 

 ceolate, bract-like, entire, sessile; heads 2 r '-2.\" 

 high, somewhat secund on the spreading, often 

 very slender and elongated branches of the pani- 

 cle; bracts of the involucre oblong, very obtuse; 

 rays 6-10; achenes puberulent, or glabrous below. 



In dry soil, Tennessee and Missouri. July-Aug. 

 A plant similar to this, but with larger serrate stem- 

 leaves, occurs in central Nebraska. 



41. Solidago altissima L. Tall, High, or 

 Double Golden-rod. Fig. 4253. 



Solidago altissima L. Sp. PI. 878. 1753. 



5". procera Ait. Hort. Kew. 3: 211. 1789. 



Solidago canadensis p rocera T. & G. Fl. N. A. 2 : 224. 1841. 



Solidago canadensis scabra T. & G. Fl. N. A. 2 : 224. 1841. 



Stem stout, pubescent, or hirsute nearly through- 

 out, 2-8 high. Leaves lanceolate, triple-nerved, 

 acute at each end, roughish above and pubescent 

 beneath, the lower ones sharply serrate and petioled, 

 3'-6' long, 4"-i2" wide, the upper smaller, often en- 

 tire, sessile; heads i*"-2i" high, usually numerous, 

 secund on the spreading or recurving branches of 

 the usually large panicle; bracts of the involucre 

 linear, obtuse or acutish; rays 9-15; achenes gla- 

 brous or somewhat pubescent. 



Usually in dry soil, Maine to Ontario, Nebraska, Geor- 

 gia and Texas. Confused, in our first edition, with S. 

 canadensis L. Yellow weed. Aug.-Nov. 



42. Solidago nemoralis Ait. 



Gray, Field, or Dwarf Golden-rod. Dyer's Weed. 

 Fig. 4254- 



Solidago nemoralis Ait. Hort. Kew. 3: 213. 1789. 

 Solidago nemoralis arenicola Burgess ; Britton & Brown, 

 111. Fl. 3: 344- 1898. 



Slender, ashy-gray, 6'-2 high, erect, depressed or 

 sometimes prostrate, finely and densely pubescent. 

 Leaves thick, roughish, the basal and lower ones of 

 the stem oblanceolate or spatulate, petioled, obscurely 

 triple-nerved, obtuse or acutish, crenate-dentate, 3'-6' 

 long, 4"-i2" wide; upper leaves gradually smaller, 

 oblanceolate or linear-oblong, acute or acutish, en- 

 tire; heads 2"-3" high, secund on the spreading or 

 recurving branches of the terminal, usually one-sided 

 panicle; bracts of the involucre linear-oblong; rays 

 5-9.; achenes pubescent. 



In dry soil, Nova Scotia and Quebec to Saskatchewan, 

 Florida, Texas and Arizona. July-Nov. 



Solidago pulcherrima A. Nelson (S. longipetiolata 

 Mack. & Bush), of Central North America, ranging east- 

 ward into Wisconsin and Missouri, differs mainly by 

 somewhat larger heads, and is here regarded as one of 

 the many races of S. nemoralis Ait. 



