Ehrhart in recognition of Johann Francq Van Berkhey, 
the learned author of a treatise on the structure of the 
flowers of ‘‘ Composite Plants,” published in 1760. 
Deser.—Stem attaining six feet in height, simple or 
sparingly branched, herbaceous, narrowly spinulosely 
winged by the decurrent leaf-bases. adical leaves very 
large, eighteen inches long by seven broad, obovate-oblong, 
tip rounded, sinuate-lobed, margins undulate and spinu- 
losely toothed, base narrowed into a winged petiole, scabrid 
and green above, beneath snow-white with appressed — 
cottony pubescence; upper leaves three to six inches 
long, linear or oblanceolate, sinuate-pinnatifid, spinulosely 
toothed, margins of sinus often recurved, above dark 
green and scabrid, with brown blotches and spots beneath, 
as are the cauline. Heads subcorymbose, three and a half 
inches in diameter; peduncles suberect, terete, green, 
scabrid. Jnvolucre broadly campanulate; bracts half as 
long as the ray-flowers, squarrosely spreading, lanceolate, 
yreen, tips red-brown and spinescent, margins ciliate. 
Receptacle flat. Ray-flowers very many, an inch long, 
primrose-yellow, spreading and recurved, neuter, tube 
slender, quite glabrous, tip of ligule 3-crenulate. Disk 
flowers excessively numerous, forming a convex golden- 
yellow mass, nearly two inches in diameter ; corolla tubular, 
5-cleft. Achenes short, obconic, ten-ribbed, top thickened ; 
pappus of oblong ciliate or serrulate scales shorter than 
the achene.—J. D. H. 
Fig. 1, Portion of the receptacle with a ray-flower, and two achenos sunk 
in the alveoli; 2, disk-flowers; 3 scale of pappus; 4, stamens; 5, style-arms; 
6, achene :— All enlarged. : : 
