488 
GYNANDRIA MONANDRIA. 
I have specimens collected by Mr. Jackson near Louisville, Georgia,, 
agreeing very nearly with others sent me from New- York under this name, 
by Dr. Torrey. In our southern species the bracteal leaves are scarcely 
longer than the germ, the upper ones not as long, and the horn decidedly 
shorter than the germ. Whether these plants agree really with the Siberian 
O. F uscescens, of which there is no detailed description in Willdenow, re- 
mains yet to be determined. I should scarcely expect to meet with a Sibe- 
rian plant in the alluvial districts of Georgia. 
Grows on grassy hills. Pursh. 
Flowers July. Pursh. 
) 11. Bidentata. E. 
O. labello ovali, ob- 
longo, basi bidentata; 
petalis ovatis, patenti- 
bus; cornu germine 
incrassato-breviore; fo- 
liis angusto lanceolatis; 
caule nudiusculo. E. 
To the former species this has much affinity. It appears from specimens 
to be a taller plant with a more naked stem; the bracteal leaves about as 
long as the flower, the corolla larger, the labellum oval, longer than the 
petals, entire, excepting the two very distinct teeth near the base, horn 
scarcely more than half the length of the germ, somewhat thickened at the 
point; germ unusually thick; perhaps only differing from O. Fuscescens 
from a difference of soil and in my specimens of maturity. 
Grows in the middle districts of Georgia and Carolina. 
Flowers — - 
Lip oval, oblong, 2- 
toothed at base; petals 
ovate, expanding; horn 
shorter than the thick- 
ened germ; leaves nar- 
now lanceolate; stem 
nearly naked. 
HABENARIA. Willd. 
Corolla ringens, pe- 
talis interioribus bipar- 
tite. Labellum dila- 
tatum, basi subtus cal- 
caratum. Pollinia nu- 
da, distincta. Cornua 
2 staminiformia, recta 
Corolla ringent, with 
the interior petals two- 
parted. Labellum di- 
lated with a spur under- 
neath at base. Pollen 
masses naked, distinct. 
Horns (steril processes) 
