SYNGENESIA ^QUALIS. 
315 
Root perennial. Stem erect, four to six feet high, quadrangular, deeply 
furrowed, scabrous, spotted, branching. Leaves opposite, decussate on the 
angles of the stem, hastate, lanceolate, acute, toothed, scabrous, somewhat, 
hispid, triplinerved, on petioles one to two inches long. Peduncles some* 
what terminal, frequently by pairs, bearing each one head of flowers. Involu- 
crum sixteen to twenty leaved, in two rows, leaflets equal, oblong-lanceo- 
late, hispid, a little shorter than the corolla. Corolla tubular, pubescent, 
very white, border five-cleft. Stamens as long as the corolla, black, with 
their terminating summits white. Style as long as the stamens. Stigma 
reflected, acute, glandular. Seed turbinate, quadrangular, compressed, the 
two angles slightly winged. Pappus composed of two or three bristles, 
shorter than the corolla, scabrous, with small erect prickles. Receptacle 
convex, paleaceous ; scales lanceolate, acuminate, scabrous, as long as the 
corolla. 
Grows in dry rich soils. 
Flowers August — September, 
MARSHALLIA. Gen. Pl. 1762. 
Involucrum imbrica- 
tum. Pappus paleis 5, 
membranaceis, enervi- 
bus. Receptaculum pa- 
le ace um. 
Involucrum imbricate. 
Pappus composed of 5, 
membranaceous, nerve- 
less leaves. Recepta- 
cle chaffy. 
1 . Lanceolata. Mich. 
M. caule simplici, in- 
ferne folioso, superne 
nudato; foliis radicali- 
bus obovatis, caulinis 
longo-lanceolatis; in- 
voked foliolis ovali- 
bus; paleis spathulatis. 
Stem simple, leafy 
below, naked near the 
summit; leaves of the 
root obovate, of the 
stem long, lanceolate; 
scales of the involu- 
crum oval; chaff” spa- 
thulate. 
Pursh, 2. p. 519. Nutt. 2. p. 140. 
Persoonia Lanceolata. Mich. 2. p. 105. 
Athanasia Obovata. Walt. p. 201. 
Root perennial. Stem eighteen to twenty-four inches high, striate, sim- 
ple, a little pubescent near the summit. Lower leaves obovate, those of the 
stem lanceolate, all nerved, glabrous, entire, thin, with the base long, taper- 
