534 
The Ohio Naturalist. 
[Vol. VI, No. 7, 
Hcrbcrta .S. F. ('rray. 
Stem erect, nearly simple; leaves curved and one-sided, deep!}' 
lobed, lobes lanceolate. Perianth ovate-subulate or narrowly 
fusiform, 3-angled, deeply 4-8 lobed. adttnca S. F. Gray 
Jithiila Dumort. 
Subdichotomously branching; leaves dark olive green, oblitiuely 
ovate, acute, entire or subrepand; underlcaves roundish, ser- 
rate or entire; involucral leaves bifid, serrate; perianth tri- 
a ngular-obpyriform . 
11 utchinsia; Dumort. var. Siillivantii Siiruce. 
/ iiujicrmamiia .Micheli. 
1. Leaves com])licatc-concave, almost always eciually bilobed. 2. 
Leaves not complicate-concave. 4. 
2. Stem densely covered with rootlets; leaves distant, oval with ob- 
tuse, almost rectangular sinus and acute lobes; involucral 
leaves 2-3 lobed, spinulose-serrate ; jierianth ovate, obtuse, 
the mouth contracted and ciliate. Monoecious. 
Hellcriana Xees. 
Stem sparsely covered with rootlets or frequently without any. 
Dioecious. 3. 
3. Leaves erect, spreading, subsaccate at base, their dorsal part far 
overlapping the stem, subquadrate, with acute sinus, reaching 
1^2 of the leaf, and acute, often incurved lobes; involucral 
leaves 2-3 lobed, denticulate above; perianth ovate-clavate, 
.5-6 plicate above, much contracted and long-fringed. 
Michauxii Weber. 
Leaves very regularly arranged in 2 rows (thus giving the plant a 
comb-like appearance), keeled, the lobes acute to obtuse; 
involucral leaves larger, the inner ones trifid; perianth oval- 
oblong, the mouth somewhat contracted and ciliate-dentate. 
miunta Crantz. 
4. Leaves entire or barely retuse. .5. 
Leaves 2- or more lobed or —dentate. 7. 
.5. Underleaves present (not apparent on old stems), broadly subu- 
late; upper involucral leaves laciniate. Schraderi Martins. 
Underleaves wanting; involucral leaves like the cauline. (i. 
(). Leaves orbicular, decurrent dorsally; perianth exserted, obovate— 
oblong, the mouth 4-cleft; capsule globose. 
splurrocarpa Hook. 
Leaves ovate-elliptical; perianth fusiform, plicate above and den- 
ticulate; capsule oval. pumila With. 
7. Leaves bilobed or bidentate. 8. 
Leaves 3-6 lobed or dentate, seldom 2-dentate. 16. 
8. Underleaves present. 9. 
(Jungermannia alpestris and J- ventricosa may be sought here) 
L^nderleaves wanting. 10. 
9. Leaves vertical, bifid, the lower leaves with usually acute sinus 
and lobes, the up])er much larger with rounded lobes and 
obtuse sinus; underleaves entire or the broader bifid; perianth 
without involucral leaves, dorsal. *■ Gillmaiii Aust. 
Leaves subvertical or spreading, emarginatcly bilobed, the lobes 
acute c)r the upper obtuse; underleaves somewhat obsolete or 
subulate, incurved; involucral leaves little larger, less deeply 
lobed; perianth terminal. Wattiami Aust. 
10. Leaves 2-toothed. 11. 
Leaves bifid or 2- 3-or more lobed. 13. 
11. Leaf lobes obtuse with an obtuse sinus~or acute~in the upper 
leaves; perianth pellucid, reddish below. Wallrothiana Nees. 
Leaf lobes 'acute. 12. 
