AND GENERA OF PLANTS. 343 



series, the inner dilated, ovate, obtuse; rays about twelve, deeply bifid. — Sil- 

 phium pumilum; Mich. Flor. Bor. Am., Vol. II., p. 146. Eighteen inches to 

 two feet high; leaves about as wide as long, an inch to an inch and a half long, 

 whitish beneath. Stem perfectly white and softly tomentose, the pubescence 

 matted and appressed. Primary corymb about four or five-flowered, the pe- 

 duncles naked, three to four inches long; several branches near the summit of 

 the stem, and two or three from the base of the first corymb. Rays about 

 twelve, twice as long as the disk, deeply bifid, with ten discoloured, longitudi- 

 nal lines or nerves. Achenium at first villous at the summit, the tufts extend- 

 ing like minute scales, but there appears to me no awns at any time, and the 

 summit of the achenium is entire. 



Berlandiera tomentosa; stem low and simple, subdecumbent, not canescent, 

 terminating in one, two, or few flowers, above naked; leaves petiolate, oblong- 

 ovate, and cordate-ovate, slenderly crenate, beneath tomentose; rays about 

 eight, more than twice the length of the involucrum, slightly bifid ; involucrum 

 in about two series, villous. — Silphium tomentosum; Pursh., Vol. II., p. 579. 



Hab. West Florida, near Tallahasse. Flowering in March. Less than a foot high, very few 

 leaves on the stem, (two or three,) though softly villous beneath, the leaves are strongly reticulated. 

 Stem terminating in two or three flowers. Sometimes a lateral flower comes out at a later period. 

 Achenium villous and entire, without any vestige of awn. 



Berlandiera subacaule; decumbent, stem very short, one or few-flowered, 

 peduncles very long; leaves oblong, pinnatifidly lobed, obtuse, below attenu- 

 ated, slightly hirsute, scabrous on the margin; involucrum puberulous, imbri- 

 cated in about two series, inner sepals dilated and obtuse; rays about eight, 

 not much longer than the disk, slightly bifid. 



Hab. East Florida. About eight to ten inches high; the peduncle more than a span long. 

 Scales of the receptacle very narrow. Achenium villous internally, entire, scarcely angled on the 

 back. Discal stigmas entire, minute ; two inner palea adnate to the base of the achenium, with 

 which they secede. 



ENGLEMANNIA. (Gray. MSS.) 

 Englemannia ^pinnatifida. 



Hab. The plains of Red River. Hirsute and scabrous, radical leaves bipinnatifid, cauline pin- 

 natifid, semiamplexicaule, lower segments longest, linear-lanceolate, dentate, acute, the uppermost 

 nearly entire and small. Stem tall, terete, considerably branched, scabrous ; flowers paniculate, 

 numerous, corymbose. Scales of the involucrum diminishing in size to the peduncle; peduncle 



