458 
SYNGENESIA FRUSTRANEA. 
lanceolato - oblongis, 
serratis, hispidis; disco 
subhemisphaerico; pa- 
leis pappi subulatis, 
aristatis. 
ceolate-oblong, ser- 
rate, hispid; disk near- 
ly hemispherical; chaff 
of the pappus subulate, 
awned. 
Pursh, 2. p. 574. Nutt. 2. p. 178. 
Flowers small, deep yellow. Pursh. 
Described by Pursh from specimens in the Herbarium of Sir Joseph 
Banks. 
Collected in Carolina by Bartram. Can it really belong to this genus? 
CENTAUREA. 
Involucrum varium. 
Radii corollulae infun- 
dibuliformes, irregula- 
res. Pappus pilosus. 
Receptaculum setosum. 
Gen. Pl. 1331. 
Involucrum various. 
Florets of the ray fun- 
nel-shaped, irregular. 
Pappus hairy. Recep- 
tacle bristly. 
1. Benedicta. 
C. involucri squamis 
duplicato-spinosis, Ian- 
atis, bracteatis; foliis 
semi - decurrentibus, 
denticulate spinosis. 
Scales of the involu- 
crum doubly armed 
with spines, woolly, 
with bracteal leaves at 
base; leaves somewhat 
decurrent, toothed and 
spiny. 
Sp. pl. 3. p. 2315. Nutt. 2. p. 183. 
Annual? Stems prostrate, six to twelve inches long, sparingly branched, 
very villous or woolly. Leaves sessile, pinnatifid, rugose, villous, -segments 
acute, the lower sometimes runcinate. Flowers solitary, terminal, surround- 
ed by the terminal leaves. Involucrum ovate, imbricate, the scales lanceo- 
late, glabrous, terminating in a compound pectinate spine. Florets all tu- 
bular, those of the ray slender, three-cleft, those of the disk five-cleft, one 
incision very deep. Styles of the fertile florets longer than the corolla, two- 
