ering during the months of July and August. S. perfolia- 
tum extends from Pennsylvania to Carolina. ‘The roots 
from which our plants were raised were sent from Georgia 
by Dr. Wray. 
Descr. Root perennial. Stem herbaceous, six to eight 
feet high, branched, glabrous, four-angled, angles obtuse. 
Leaves ample, rough, deltoid, sinuato-dentate, petiolate, 
opposite, the petioles connate, upper leaves broadly ovate, 
scarcely toothed, sessile and connate, concave. Peduncles 
rounded, glabrous, generally in threes from the ultimate 
pair of leaflets, of which the middle one is single-flowered 
and naked, the lateral ones two or three-flowered, with a 
pair of small connate leaves. Flowers very large, yellow. 
Involucre \eafly, the scales or leaflets squarrose, gradually 
smaller within, and insensibly becoming narrow, linear, 
chaffy scales to the florets. Florets of the ray about twenty- 
five to twenty-eight, fertile, in four rows. Achenia com- 
pressed and winged, the innermost ones nof bidentate : 
outer broader and with two short teeth. Florets of the 
centre with a long, cylindrical, abortive germen. Anther 
dark brown. Stigma yellow, linear-filiform, glandular. 
Fig. 1. Inner Floret of the Ray. 2. Achenium of an outer Floret. 3. 
Ditto of the Disk: magnified. 
