Dec., 1909.] 
The Orchids of Ohio. 
2 5 
larger and of different form than the others, often spurred, and 
called the lip; fertile stamens one or two, variously united with 
the style into an unsymmetrical column ; seeds numerous and 
minute. 
KEY TO THE OHIO GENERA. 
1 . Anthers 2, one on each side of the style, with a trowel-shaped body 
on the upper side ; lip a large inflated sac Cypripedium 
1. Anthers 1, lip not a large inflated sac 2 
2. Leaves 5, whorled, on a long stalk, flowers terminal; lip spurless; 
pollen mass powdery -granular Isotria 
2. Leaves not whorled though they may be opposite 3 
3. Leaves broad in a basal rosette white reticulated, the flowering stems 
with bracts, the flowers in bracted spikes Peramium 
3. Flowering stem with one well developed leaf (not grass-like) at about 
the middle 4 
3. Stems with several leaves, or leafless; if with basal leaves, then not 
in a rosette 5 
4. Flowers large, lor 2.. . Pogonia 
4. Flowers small, numerous, in a terminal raceme Achroanthes 
5. Flowers single, rose-purple, the lip crested with hairs; leaves linear 
or reduced to bracts Arethusa 
5. Flowers several or numerous 6 
6. With 1 or 2 prominent basal leaves, the stem leaves reduced to 
bracts, or with all the leaves bract-like 7 
6. With normal leaves on the stem 12 
7. With 1 or 2 basal foliage leaves 8 
7. Leaves all reduced to bracts 11 
8. With 2 basal leaves 9 
8. With 1 basal leaf 10 
9. Flowers in a short loose spike with large leaf-like bracts surpassing 
them, violet-purple mixed with lighter purple and white; lip 
entire, produced below into a spur Galeorchis 
9. Flowers in a long loose spike, greenish or white, bracts large, nearly 
equalling the flower; lip linear, or nearly so, spur long and slender 
Lysias 
9. Flowers in terminal racemes, brownish-purple or yellowish-green, the 
subtending bracts minute and scale-like; lip flat, entire, not spurred. 
Leptorchis 
10. Flowers in a terminal raceme, the pedicels subtended by small bracts; 
flowers not spurred Aplectrum 
10. Flowers in a long loose raceme, nodding, bractless; flowers long- 
spurred Tipularia 
11. Flowers in a spike, without spurs, white, greenish, or yellowish. 
Gyrostachys 
1 1 . Flowers in a raceme, with short spurs, dull purplish, or whitish mottled 
with crimson Corallorhiza 
12. Flowering stem with a single large grass-like leaf; flowers large, 4-10. 
Limodorum 
12. Flowering stem with several prominent leaves 13 
13. Leaves not much longer than broad; flowers few, axillary, pale purple, 
the lip spurless Triphora 
13. Leaves all much longer than broad 14 
14. Flowers spiked, small, greenish, without a spur, leaves mostly narrow 
or bract-like Gyrostachys 
14. Flowers with a spur 1.5 
1.5. Lip of the corolla fringed or parted and cut-toothed; spike with 
foliaceous bracts Blephariglottis 
