COMPOSITAE (COMPOSITE FAMILY) 485 



Leaves large (6-10 cm. or more long), usually in verticils of 3 . . 1. E. maculatum. 

 Leaves small (2-5 cm. long), opposite. 



Involucral bracts striate . . . . . . . . 2. E. Fendleri. 



Involucral bracts not striate 3. E. texense. 



1. Eupatorium maculatum L. Amoen. Acad. 4: 288. 1755. Stems 5-15 

 dm. high, more or less spotted with purple: leaves in whorls of 3-5, ovate 

 to ovate-lanceolate, 5-15 cm. long, more or less pubescent and of ten scabrous, 

 rather coarsely toothed: corymbs flat-topped or ovate: involucres 7-8 mm. 

 high, the outer bracts obtuse, pubescent: corollas white, pink, or purple. (E. 

 Bruneri Gray, Syn. Fl. 1: 96. 1886; E. Rydbergii Brit.; E. atromontanum A. 

 Nels. Bot. Gaz. 31 : 400. 1901.) Known as JOE PYE WEED. From New Mex- 

 ico, through our eastern border and thence both eastward and westward. 



2. Eupatorium Fendleri Gray, Proc. Am. Acad. 17: 205. 1882. Stem 3-6 

 dm. high, leafy, obscurely puberulent: leaves dentate, opposite or the upper al- 

 ternate, deltoid-subcordate, tapering gradually to an acute or acuminate 

 point: heads comparatively small and numerous, paniculate, all peduncled; 

 bracts of the involucre all obtuse, the outer oblong: flowers white: achenes 

 minutely pubescent. [E. arizonicum Greene, Pitt. 4: 280. 1901 (?).] New 

 Mexico and possibly in Colorado and Utah. 



3. Eupatorium texense (T. & G.) Rydb. Fl. Col. 335. 1906. Herbaceous or 

 nearly so, 5-10 dm. high; branches slender, spreading: leaves more or less 

 cinereous-puberulent, deltoid-ovate, obtuse or acute, more or less dentate, 

 slender-petioled: heads 8-10 mm. high, about 12-flowered; involucral bracts 

 nearly or quite nerveless, almost linear. E. ageratifoliwn. Infrequent; 

 Colorado and southward. 



3. KUHNIA L. FALSE BONESET 



Perennial caulescent herbs with puberulent or pubescent foliage. Leaves 

 alternate; blades resinous-dotted. Heads discoid, in open or crowded clus- 

 ters; involucres narrow, several-many-flowered; bracts narrow, in few series, 

 striate, the inner successively longer. Receptacle naked. Corollas white or 

 purplish. Anthers obtuse and entire at the base. Stigmas slender, rather 

 obtuse. Achenes 10-20-striate, columnar. Pappus of one series of very 

 plumose hair-like bristles. 



Achenes 10-striate, shorter than the pappus. 



Flowers 20-30; stems branched from the base up . . . . 1. K. Hitchcockii. 



Flowers 15-20; stems simple below . . . . . . 2. K. glutinosa. 



Achenes 20-striate, nearly or quite as long as the pappus. 



Leaves narrowly lanceolate to linear; stems erect or spreading, usu- 

 ally freely branched above . . . . . . . 3. K. Gooddingii. 



Leaves ovate to lanceolate; stems assurgent, nearly simple . . 4. K.^reticulata. 



1. Kuhnia Hitchcockii A. Nels. Bot. Gaz. 31: 403. 1901. Tufted- 

 suffrutescent, the lignescent stems decumbent-spreading, ea<Jn divaricately 

 branched from the base up, dark, minutely puberulent as are also the leaves: 

 stem leaves nearly linear, with a few sharp teeth, 3-4 cm. long; those of the 

 rigid branches numerous, small, linear, 2-3 cm. long: involucre usually sub- 

 tended by a few linear bractlets, the bracts in about 5 series, the short outer 

 ones broadly lanceolate, the inner broadly linear with thin, scarious margins 

 and cuspidate apex: flowers 20-30, the tube nearly uniform: achenes small, 

 about 10-striate, shorter than the dull white to tawny, distinctly plumose 

 pappus. On the dry plains east of the mountains. 



2. Kuhnia glutinosa Ell. Bot. S. C. & Ga. 2: 292. 1824. Rather densely 

 rough pubescent; stems 5-12 dm. tall, branching above: leaf -blades lanceo- 

 late to linear-lanceolate below, 1-4 cm. long, acute or acuminate, shallowly 

 serrate, sessile by the broad bases or partly clasping: involucres 8-10 mm. 

 high; bracts subulate without, lanceolate to linear within and cuspidate- 

 acuminate: achenes 5 mm. long; pappus tawny or brownish. K. eupatorioides 

 corymbosa. From South Dakota to Alabama and Texas and in the eastern 

 part of our range. 



3. Kuhnia Gooddingii A. Nels. 1. c. 402. In dense clumps from a tufted 



