AMONG THE WILD FLOWERS. 117 
were not to visit these plants when in bloom, 
they would be sterile. 
Our Orchid plants are comprised in five 
Tribes, which are distinguished chiefly by the 
peculiarities of the anther, and of the pollen. 
The principle genera are—Orchzs, of which 
seven species are fairly common; Aceras, the 
Green-Man Orchis, only one species, the four- 
lobed lip of whose green flowers has two upper 
lobes very long, hanging down like human 
arms, the middle portion long and cleft so as to 
resemble legs; Hadbenarza, including the Frog 
Orchis, HY. vervzdis, and the two species of 
Butterfly Orchis; the genus Ofhrys, in which 
are included the Bee, the Fly, and the early and 
late Spider Orchis ; Hlermznzum, Musk Orchis, 
a tiny but interesting plant; three species of 
Stiranthes, Lady’s Tresses; the Tway-blade, 
Listera, two species, of which one is only three 
to five inches high; the other, frequently met 
with, has two broad ovate leaves, and a stiff 
spike of green flowers; Veottza Nzdus-avis, 
Bird’s-nest Orchis, a curious plant, stem and 
flowers alike of a pale reddish-brown, leaves 
none, found in shady woods; four species of 
Lpipactis, Helleborine, fine plants, with incon- 
