SYNGENESIA FRUSTRANEA. 
449 
1. Bicolor. 
Sp. pi. 3. p. 2245. Pursh, 2. p. 572. Nutt. 2. p. 175. 
G. Lanceolata, Mich. 2. p. 142. 
Root perennial. Stem herbaceous, about two feet high, pubescent, spa*- 
ringly branched, with the branches twiggy and naked. Leaves alternate, 
sessile, linear-lanceolate, acute, pubescent, with a few serratures, fringed, 
the hairs of the fringe hooked. Flowers solitary, terminal. Involucrum 
many leaved, leaves arranged in two series, the exterior (9) reflexed, the 
interior (12 — 13) erect, all lanceolate, acute, pubescent. Florets of the 
ray about eight, dilated at the summit, three-cleft, with the segments une- 
qual, yellow; of the disk numerous, tubular, deeply five-cleft, the segments 
linear, glandular, at first yellowish, afterwards dark purple. Stamens 
shorter than the corolla. Anthers yellow. Style of the ray 0; of the disk 
longer than the stamens, two-cleft. Seeds slightly turbinate, clothed with 
white hair. Pappus eight or nine leaved, leaves membranaceous, terminat- 
ing in a long awn, with the awn as long as the corolla. Receptacle conic, 
glabrous? dotted. 
The plant which I have described is certainly the G. Lanceolata of Mi- 
chaux. I have doubts whether it is the G. Bicolor of Willdenow. 
Grows in the dry pine barrens in the middle country of Georgia. u 
Flowers May— -August. 
RUDBECKIA. 
Involucrum subae- 
quale, duplici ordine 
squamarum. Pappus 
margine quadridentato. 
Receptaculum coni- 
cum, paleaceum. 
* Involucro imbri- 
cato; paleis receptaculi 
mucronatis r. 
Gen. Pe. 1324. 
Involucrum nearly 
equal, scales in a dou- 
ble series. Pappus with 
a 4-toothed margin. 
Receptacle conic, chaf- 
fy- 
* Involucrum im- 
bricate ; chaff of the 
receptacle mucronate. 
1. Purpurea. 
R. aspera; foliis in- 
ferioribus lato ovatis, 
basi attenuatis, remote 
ror.v tp, e £ 
Rough; lower leaves 
wide, ovate, tapering 
at base, remotely too- 
