398 SYNGENESIA SUPERFJLUA. 
9. PtJSILLUM. Nutt. 
Slender; stem gla- 
brous; leaves linear- 
lanceolate, entire, sca- 
brous along the mar- 
gins; panicle nearly 
simple, the branches 
divaricate. 
Nutt. 2. p. 148. 
Plant small. Stem four to six inches high; panicle simple, somewhat 
fastigiate, branches naked, or merely furnished with small scales, each per- 
fecting two or three flowers. Nutt. 
This small and perhaps doubtful species is also found in Carolina, and if 
this section should be established as a genus, new species may be detected. 
We have a very large variety six to eight or ten feet high, which I think 
will also be found sufficiently distinct from the common E, Canadense. 
Grows with the preceding. 
Flowers through the summer. 
E. gracile; came gla- 
bro; foliis lineari-lan- 
ceolatis, integris, mar- 
ginibus scabris; pani- 
cula subsimplici, ramu- 
lis divaricatis. 
BOLTONIA. Gen. Pe. 
Receptaculum favo- 
Sum, hemisphaericum. 
Pappus dentato-aris- 
tatus subbicornis. Co- 
rollulce radii plurimae. 
Jnvolucrum imbrica- 
tum. 
1. Asteroides. 
B. foliis integerrimis; 
floribus Ionge peduncu- 
latis; seminibus ovali- 
bus, glabrls, submuti- 
cis. 
Receptacle favose, 
hemispherical. Pap- 
pus awned, 2 generally 
conspicuous. Florets 
of the ray numerous. 
Jnvolucrum imbricate. 
Leaves entire; flow- 
ers on long peduncles; 
seed oval, glabrous, 
scarcely awned. 
