©F NORTH AMERICA 
m 
814. Streblanthus auriculatus Raf. as 
above. Stems filiform flexuose, leaves subsessile, 
lower petiolate ovate lanceolate acuminate 
gashed or with 1 or 2 auricles, heads axillary 
solitary pedunculate— In the Western glades of 
Kentucky, flowers estival bluish, stems a foot 
long quite weak, leaves commonly with some 
notches, auricles unequal when double, involu- 
cres linear, papillas of phoranthe very short. 
815. Streblanthus heterophylus R. Eryn- 
gium prostratum Nut. stems filiform fiexuose, 
leaves petiolate ovate elliptic and rounded, ob- 
tuse retuse or subacute entire, the upper some- 
times auriculate, heads axillary solitary pedun- 
culate — found in Arkanzas by Nuttal, and a real 
Streblanthus very similar to the last, chief dif- 
ference the great diversity of the leaves, quite 
entire. The Eryngium gracile of Elliot ap- 
pears to answer to this species. 
816. Streblanthus hum ills R. Eryngium 
gracile Tor. not Bald. E. halduini Spr. Dec. 
smooth suberect dwarf, lower leaves petiolate 
ovate acute dentate, upper sessile lanceolate 
often triparted. heads axillary and terminal — * 
from Tampa Bay in Florida, sent me by Torrey 
for the next, quite different, only 3 inches high, 
involucres linear as long as heads, flowers blu- 
ish quite similar to the two last. 
817. Subgenus KL ONION Raf. differs by 
the phoranthe convex with stiff subulate chaffs 
like bracts longer than flowers, and no involu- 
cre but those outer bracts, 4 or 5 concave petals. 
— Here there is an approximation to Eryngium, 
the plants are stiffer, the flowers spinescent, but 
there is no perianthe or involucre, the leaves 
are still opposite, the roots annual, there are 
tome male flowers, and many have only 4 sta- 
