366 COMPOSITE. SouDAGO. 



20. SoLiDAGO GiGANTEA, Ait. Tail SiHooth GoMeu-rod. 



Stem smooth and often glaucous ; leaves quite smooth on both sides, lanceolate, attenuate- 

 acuminate, scabrous- ciliolate, sharply serrate except the narrowed base ; panicle large, 

 pyramidal , the racemes numerous and recurved ; peduncles pubescent ; heads rather large 

 rays cxsertcd ; achenia pubescent. — Ait. Keio. (ed. 1.) 3. p. 211 ; Willd. sp. 3. p. 2056 

 Hook. ft. Bor.-Am. 2. p. 2; DC. prodr. 5. p. 331 ; Torr. df- Gr. ft. N. Am. 2. p. 224. S. 

 serotina, Willd. I. c. 



Stem 3-7 feet high, and, as well as the leaves, perfectly smooth. Leaves varying from 

 broadly to narrowly lanceolate. Panicle usually large. Heads larger than in the two pre- 

 ceding species. 



Fields and thickets ; common. August - September. 



& 3. EuTHAMiA, Nutt. Scales of the involucre much appressed, somewhat glutinous : receptacle 

 fimbrillate : rays (6 - 20) more numerous than the disk-flowers, very small. Stem much 

 branched, fastigiate-corymbose : heads in corymbose clusters, mostly fascicled : leaves linear, 

 entire, sessile. 



21. SoLiDAGO LANCEOLATA, Linn. Bushy Golden-rod. 



Stem much branched, fastigiate ; leaves lanceolate-linear, 3 - 5-nerved, minutely scabrous- 

 pubescent ; heads ovoid-cylindrical, in dense corymbose clusters, sessile; rays 15-20, 

 minute ; disk-flowers 8-12. — Linn. mant. p. 114 ; Ait. Kew. (ed. 1.) 3. /;. 214 ; Miclix. 

 ft. 2. p. 116 {var. major) ; Pursh, ft. 2. p. 405 ; Bigel. ft. Bost. p. 301 ; Beck, bol. p. 194 ; 

 Hook. ft. Bor.-Am. 2. p. 6 (partly) ; Darlingt. ft. Cest. p. 461 ; Torr. ^- Gr. ft. N. Am. 2. 

 p. 226. S. graminifolia, Ell. sk. 2. p. 391 ; DC. prodr. 5. p. 341. Euthamia graminifolia, 

 Nutt. gen. 2. p. 162, and in trans. Amer. phil. sac. (n. ser.) 7. p. 326. 



Stem 2-4 feet high, slightly pubescent and somewhat rough (particularly above), an- 

 gularly striate. Leaves 3-6 inches long and 3-5 lines wide, slightly pubescent, 3- (the 

 broader ones 5-) nerved, very slightly marked with resinous dots. Heads about 3 lines long. 

 Scales of the involucre oblong or lanceolate, obtuse, shining and slightly viscid. Achenia 

 villous-pubescent. 



Low grounds, thickets, etc. ; sometimes in rather dry situations ; very common. August 

 - September. Easily distinguished by its much-branched, flat-topped stem, and long, broadly 

 linear leaves. 



22. SoLiDAGo TENUiFOLiA, Pursh. Shnder-ledved Golden-rod. 

 Stem much branched, fastigiate ; leaves very narrowly linear, spreading, 1- (or rarely 3-) 



nerved, punctate with resinous dots ; heads obovoid or turbinate, in loose corymbose clusters, 

 sometimes pedicellate ; rays 6-12, slightly e.xserted ; disk-flowers 5-6. — Pursh, ft. 2. 



