COMPOSITE. 179 



var. alpina Dig, : a few inches in height, with obovate or lanceolate, 

 mostly entire, leaves. 



Woods on the sides of the White Mountains, N. H. Big. Summit of Mount 

 Marcy, Essex county, N. Y. Torr. N. to Labrador. Aug. Oct. 7J.. Stem 

 flexuous, 1 3 feet high. Leaves elliptic or lanceolate, often with a long narrow 

 base, serrate ; the upper nearly entire. Heads few and large ; rays about 8, 

 elongated. Common to Europe, Asia and America. A variable species. 



Common Golden-rod. 



27. S. humilis Pursh : glabrous ; stem simple, erect ; radical leaves ob- 

 lanceolate or spatulate, obtuse, crenate-serrate at the apex, tapering into a 

 petiole ; cauline lanceolate, acute, narrowed at the base ; uppermost linear 

 and entire ; raceme simple or compound and paniculate, elongated, strict ; 

 scales of the involucre oblong, mostly obtuse. ( Torr. fy Gr.) 



Banks of Onion river, Ver. Robbins. N. to Hudson's Bay. Aug., Sept. 1J-. 

 Stem 6 15 inches high, smooth, but more or less glutinous. Heads middle- 

 sized, rather crowded ; rays 6 8, short. Dwarf Golden-rod. 



28. S. thyrsoides Meyer : stem erect, or somewhat flexuous, simple, smooth j 

 the summit and peduncles villous-pubescent ; leaves smooth, ovate, irregu- 

 larly and sharply serrate, acute or acuminate, narrowed into very long pe- 

 tioles ; uppermost oblong-lanceolate, subsessile, often pubescent beneath ; 

 heads large, in an oblong simple raceme ; scales of the involucre lanceolate, 

 acuminate, membranaceous. (Torr. fy Gr.} 



Wooded sides of the White Mountains, N. H. Bootl. Killington Peak, Ver. 

 Robbins. N. to Labrador. Aug., Sept $fci Allied to S. Virga-Aurea, but has 

 the leaves, except the uppermost, on. long petioles, and the heads larger. 



Thyrse-like Golden-rod. 



29. S. squarrosa Muhl. : stem thick, very pubescent above ; leaves 

 smooth ; lower very broad, spatulate-6val, serrate, acute, scabrous on the 

 margin ; upper sessile, lanceolate-elliptic, entire ; racemes axillary, glome- 

 rate ; involucre squarrose, many-flowered. S 1 . macrophytta Pursh. 



Rocky banks. Can. to Penn. Aug., Sept. 1\.. Stem 2 4 feet high, stout, 

 simple. Heads in dense axillary clusters, forming a long leafy compound spike ; 

 rays 10 12, bright yellow, elongated. Well distinguished by its squarrose invo- 

 lucre. Squarrose Golden-rod. 



** Scales of the involucre much appressed, somewhat glutinous. Ray- 

 jlowers more numerous than those of the disk, very small, yellow. Receptacle 

 fimbrillate. Heads in corymbose clusters, mostly fascicled. Leaves linear, 

 quite entire, sessile. EUTHAMIA Nutt. 



30. S. lanceolata Linn. : stem much branched, fastigiate ; leaves lanceo- 

 late-linear, very entire, 3 5-nerved, minutely scabrous-pubescent ; heads 

 ovoid-cylindric, in dense corymbose clusters, sessile. S. gramimfolia Ell. 

 Euthamia graminifolia Nutt. 



\jn\\ grounds. Throughout the U. S. N. to Subarct. Amer. Aug., Sept. 

 1|_. Stem 24 feet high, roughish-pubescent, angular- striate. Heads rather 

 large, in clusters at the summit of the corymbose branches ; rays 15 20, small ; 

 diskjlowers 812. Bushy Golden-rod. 



31. S. tenuifolia Pursh. : stem angled, scabrous, with fastigiate branches ; 

 leaves very narrow-linear, spreading, 1- or rarely 3-nerved, covered with 

 glandular dots, scabrous on the margin; heads obovoid or turbinate, in 



