GENUS 22. 



THISTLE FAMILY. 



34. Solidago juncea Ait. Early or Sharp- 

 toothed Golden-rod. Fig. 4246. 



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

 S. arguta scabrella T. & G. Fl. N. A. 2 : 214. 1841. 

 Solidago juncea scabrella A. Gray, Syn. Fl. 2 : Part 2, 



155. 1884. 

 Solidago juncea ramosa Porter & Britton, Bull. Torr. 



Club 18: 368. 1891. 



Stem glabrous, or very nearly so throughout, 

 rigid, rather stout, simple, or branched at the in- 

 florescence, ii-4 high. Leaves firm, glabrous, 

 sometimes rough, lanceolate or oval-lanceolate, 

 acute or acuminate, serrate, serrulate, or nearly 

 entire, the lower large, sometimes 12' long and 

 2' wide, long-petioled, the upper smaller, sessile; 

 heads \\"-2" high, secund on the recurved or 

 sometimes nearly erect branches of the usually 

 ample spreading panicle; rays 7-12, small; bracts 

 of the involucre oblong or ovate-oblong, obtuse 

 or acute ; achenes glabrous or sparingly pubescent. 



In dry or rocky soil, New Brunswick to Hudson 

 Bay, Saskatchewan, North Carolina and Missouri. 

 One of the earliest flowering species. Yellow top. 

 Plume or pyramid-golden-rod. June-Nov. 



35. Solidago arguta Ait. Cut-leaved 

 Golden-rod. Fig. 4247. 



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

 5". Muhlenbergii T. & G. Fl. N. A. 2 : 214. 1841. 

 S. Vaseyi Heller, Muhlenbergia i : 7. 1900. 

 S. Harrisii Steele, Contr. Nat. Herb. 13 : 369. 



191 1. 



Stem simple, rather stout, glabrous, or 

 sparingly pubescent above, 2-4 high. Leaves 

 thin, pinnately veined, the lower and basal 

 ones broadly ovate or oval, short-acuminate, 

 3'-! 6' long, I '-5' wide, narrowed into mar- 

 gined petioles, or subcordate, sharply and 

 coarsely serrate; upper leaves sessile, ovate 

 to oblong, acute or acuminate, more or less 

 serrate, smaller; heads 2$ "-3" high, secund 

 on the lateral racemose branches of the termi- 

 nal, often leafy panicle; rays 5-7, large; 

 bracts of the involucre oblong, obtuse ; achenes 

 glabrous or nearly so. 



In rich woods, Maine to Ontario, Virginia and 

 Tennessee. Ascends to 2700 ft. in the Adiron- 

 dacks. July-Oct. 



36. Solidago canadensis L. Canada or 

 Rock Golden-rod. Fig. 4248. 



Solidago canadensis L. Sp. PI. 878. 1753. 

 Solidago rupestris Raf. Ann. Nat. 14. 1820. 

 5". canadensis glabrata Porter, Bull. Torr. Club 21 : 

 310. 1894. 



Stem slender, glabrous, or pubescent above, 

 i-5 high. Leaves thin, triple-nerved, linear- 

 lanceolate, 2'-s' long, 3"-s" wide, entire, or ser- 

 rate with somewhat appressed teeth, acuminate at 

 the apex, narrowed at the base, sessile, or the 

 lowest petioled, glabrous, or pubescent; heads 

 small, \\" high or less, secund on the spreading 

 branches of the often large panicle; rays 4-6, 

 short ; bracts of the involucre thin, linear, acutish ; 

 achenes small, nearly glabrous. 



Hillsides, thickets and banks of streams, New- 

 foundland to Virginia, Ontario, Saskatchewan, Ten- 

 nessee and South Dakota. Aug.-Oct. 



Solidago gilvocanescens Rydb. differs in being 

 canescent ; it ranges from Illinois to Manitoba, Sas- 

 katchewan, Nebraska and Utah. 



