COMPOSIT.E. 179 



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

 mostly entire, leaves. 



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

 Marcy, Essex county, N. Y. Torr. N. to Labrador. Aug.— Qct. %. — 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. d^ Gr.) 



Banks of Onion river, Ver. Robbins. N. to Hudson's Bay. Aug., Sept. %.— 

 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. thyrsgidcs Meyer : stem erect, or somewhat flexuous, simple, smooth 

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

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

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

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

 acuminate, membranaceous, {JTorr. <^ Gr.') 



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

 Robbins. N. to Labrador. Aug., Sept. %. — Allied to <S. FiV^a-Awea, but has 

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



Thyrse-like Golden-rod. 



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

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

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

 xate ; involucre squarrose, many-flowered. S*. macrophylla Pursh, 



Rocky banks. Can, to Penn. Aug., Sept. %.—Stem 2,— 4 feet high, stout, 

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

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

 l-ucre. . Squarrose Golden-rod. 



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

 Jlowers more nuvierous than those of the disk, very small, yellow. Receptacle 

 flmbrilZate, 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: graminifolia Ell. 

 Euthaviia graminifolia Nutt. 



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

 %. — Stem 2 — 4 feet high, roughish-pubescent, angular-striate. Heads rather 

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

 disk flowers 8—12. 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 



