genus is very closely allied to Lindheimeria and Berlandiera, 
plants of the same region. 
Desor. A hardy perennial herb, one to two feet high, 
clothed all over with a roughish pubescence or with soft 
spreading hairs. Stem erect, unbranched, cylindric, straight 
or \flexuous. Leaves two to five inches long, petioled, 
oblong, sinuate-pinnatifid to below the middle; lobes 
spreading and ascending, obtuse, entire toothed or lobulate, 
especially on the lower margins, one-nerved. Heads one to 
two inches in diameter, corymbosely panicled, on long slen- 
der peduncles. IJnvolucre of several series of loose coria- 
ceous green bracts, the outermost herbaceous oblong; the 
innermost orbicular, concave, coriaceous, with a short leafy 
tip ; receptacle flat, clothed with chaffy scales ; outer scales 
lanceolate, adhering in pairs to the base of each involucral 
bract ; inner narrow, obtuse. Ray-flowers eight to ten, 
female, with an elliptic lanceolate golden-yellow ray which 
is entire at the tip. Disk-flowers hermaphrodite, but sterile; 
corolla funnel-shaped, five-cleft. Stamens with the anthers 
subentire at the base. Style of the ray-flowers two-armed, 
of the disk entire, long, hispid. Achenes of the ray broadly 
obovoid, dorsally much compressed, keeled down the face, 
hispid, crowned with two short awns, each attached at the 
base laterally to two scales of the receptacle, anteriorly to a 
bract of the involucre, and posteriorly to another recep- 
tacular scale which encloses a sterile achene; the achene, 
three scales, and abortive achene and involucral bracts, all 
fall away together.—J. D, H. 
Fig. 1, Inner bract of involucre ; 2, ray-flower ; 3, style-arms of ditto; 4, disk- 
flower; 5, style-arms of ditto; 6, two outer scales of receptacle with an inner one 
between them ; 7, single scale ; 8, achene :—all enlarged. 
