94 2 FLORA. 



48. Solidago Riddellii Frank. RIDDELL'S GOLDENROD. (I. F. f. 3716.) 

 Stem stout, glabrous, or slightly pubescent above, 3-9 dm. high. Leaves numerous, 

 thick, glabrous on both sides, entire, acute at each end, the lower and basal 01163 

 long-petioled, elongated, often 3 dm. long, 8-20 mm. wide, the upper smaller, simi- 

 lar, sessile and clasping at the base, conduplicate, somewhat falcate; heads 6 8 mm< 

 high, 2O-3O-flowered, very numerous in a dense corymbose cyme, involucre oblong, 

 campanulate, its bracts broadly oblong, obtuse; rays 7-9, narrow; achenes 5* 

 nerved, glabrous. On moist prairies, Ohio to Minn, and Mo. Also at Fortress 

 Monroe, Va. Aug-Sept. 



49. Solidago Houghtonii T. & G. HOUGHTON'S GOLDENROD. (I. F. f. 

 3717.) Stem glabrous below, sparingly pubescent above, 36 dm. high. Leaves 

 linear, the basal and lower ones petioled, 4-8 mm. wide, 3-nerved, entire, acute at 

 each end, the upper sessile, slightly conduplicate, otherwise similar, the uppermost 

 small and bract-like; heads about 6 mm. high, few, in a small corymbose cyme, 

 2o-3O-flowered ; involucre broadly campanulate, its bracts oblong, obtuse; achenes 

 glabrous, 4-5 -nerved. In swamps, north shores of Lakes Superior and Huron, and 

 in Genesee Co., N. Y. Autumn. 



23. EUTHAMIA Nutt. 



Erect, paniculately branched herbs, perennial by -long rootstocks, with linear 

 or linear-lanceolate entire sessile 1-5 -nerved punctate leaves, and numerous small 

 heads of both tubular and radiate yellow flowers, clustered in the large cymose, 

 convex or nearly flat-topped inflorescence. Bracts of the involucre obtuse, ap- 

 pressed, somewhat glutinous. Receptacle flattish, fimbrillate, or pilose. Ray- 

 flowers pistillate, usually more numerous than the disk-flowers, the rays small. 

 Disk-flowers perfect. Anthers obtuse at the base. Style branches with lanceolate 

 appendages. Achenes top-shaped or oblong, villous-pubescent. [Greek, referring 

 to the clustered heads.] Four known species, the following, and one of western 

 N. Am. 



Leaves distinctly 3-5-nerved; ray-flowers 12-20. i. E. graminifolia. 



Leaves i-nerved, or with a pair of indistinct lateral nerves ; ray-flowers 5-10. 



Stem-leaves 4-6 mm. wide ; disk-flowers 3 or 4. 2. . leptocephala. 



Leaves 1-4 mm. wide; disk-flowers 5 or 6. 3. E. Caroliniana. 



1. Euthamia graminifolia (L.) Nutt. BUSHY or FRAGRANT GOLDENROD. 

 (I. F. f. 3718.) Stem glabrous, sometimes slightly rough above, 6-12 dm. high. 

 Leaves numerous, linear-lanceolate, acuminate or acute at each end, 2-12 cm. 

 long, 4-8 mm. wide, minutely rough pubescent on the margins and nerves of the 

 lower surface; resinous dots few; heads 46 mm. high, sessile in capitate clusters 

 arranged in a flat-topped corymbose cyme; involucre ovoid-campanulate, its bracts 

 oblong or oblong-lanceolate, slightly viscid; disk-flowers 8-12. In moist soil, fields 

 and roadsides, N. B. to the N. W. Terr., Fla., Neb. and Kans. July-Sept. 



2. Euthamia leptocephala (T. & G.) Greene. WESTERN BUSHY GOLDEN- 

 ROD. (I. F. f. 3719.) Stem much branched, smooth, 4-7 dm. high. Leaves 

 linear to linear-lanceolate, acuminate or acute at each end, rough-margined, those 

 of the stem usually 57 cm. long, 4-6 mm. wide; heads 4-6 mm. high, rather nar- 

 rower than those of the preceding species, sessile in the clusters of the flat-topped 

 inflorescence; bracts of the involucre linear-oblong. In moist soil, Mo. to La. and 

 Tex. Aug. -Oct. 



3 Euthamia Caroliniana (L.) Greene. SLENDER FRAGRANT GOLDENROD-. 

 (L F. f. 3720.) Resembles the preceding species but is smaller, glabrous, and 

 somewhat resinous, seldom over 4 dm. high. Leaves narrowly linear, entire, acu- 

 minate, sessile, narrowed at the base, 2-7 cm. long, 2-4 mm. wide, punctate, often 

 with smaller ones clustered in the axils; heads about 3 mm. high, very numerous 

 and crowded in the dense corymbose cyme; involucre oblong-campanulate, its 

 bracts oblong. In dry sandy soil, eastern Mass, to III., Fla., La. and Tex., mainly 

 near the coast. Aug.-Oct. [Solidago tenuifolia Pursh.] 



24. BRACHYCHAETA T. & G. 



An erect, perennial herb, with the aspect of a Goldenrod. Leaves alternate, 

 the lower and basal ones lar^e, cordate, long petioled, the upper ovate, short* 



