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SILPHIUM TRIFOLIATUM. WuoRL-LEAVED — 
SILPHIUM. ) 
EEE EEE REE EERE EEE EEE 
Class and Order. 
SyncEnesiA PotyeamiA NEcEsSARIA. 
( Nat. Ord.—Composirz. ) 
Generic Character. 
Receptaculum paleaceum. Pappus marginato-bicornis. 
Cal. squarrosus. 
Specific Character and Synonyms. 
Sitpurum trifoliatum ; caulibus angulatis glabris, foliis ter- 
natim quaternatim verticillatis lato-lanceolatis denta- 
tis, panicula di- trichotoma. 
Sitpuio trifoliatum. Linn. Sp. Pl. p. 1302. Willd. Sp. 
Pl. v. 3. p. 2332. Pursh, Fl. Am. v. 2. p. 378. Eilli- 
ott, Carol. v. 2. p. 467. Spreng. Syst. Veget. v. 3. 
p. 630. 
Sipniuo ternifolium. Mich. Am. v. 2. p. 146. 
A native of Carolina, Virginia, and Georgia, and received 
at the Glasgow Botanic Garden (along with the preceding — 
species S. perfoliatum) from Dr. Wray. It flowers at the 
same season, but is a less showy plant, having smaller and 
paler coloured flowers, and leaves more resembling those of 
several species of Sun-flower. 
- Descr. Stem arising from a perennial root, erect, five to 
six feet high, purplish, smooth, angled, panicled above. 
Leaves mostly verticillate, spreading, three or four together, 
the lower ones often alternate, all of them scabrous, especi- 
ally above, broadly lanceolate, toothed. Panicle branched 
in a di- or trichotomous manner, glabrous, with small leaves 
at 
