532 
The Ohio Naturalist. 
[Vol. VI, No. 7, 
tangular acute sinus; underleaves often on sterile stems as 
also on fruiting branches. divaricata Dumort. 
Growing on rotten wood; dioecious; perianth broadly oval to 
ovatefusiform. 8. 
8. Perianth small, whitish, obovate or ovate-fusiform, obtusely 8- 
angled, the mouth setulose or ciliate; leaves with a broad or 
lunate sinus and broad-subulate, mostly acute lobes. 
Macoiinii Aust. 
Perianth broadly oval or subobovate, obtusely angled, the apex 
slightly plicate, the mouth connivent, dentate, sometimes 
narrowly scarious; leaves imbricate, more or less serrate, the 
sinus and lobes subacute; underleaves present. 
Snllivantii Aust. 
ChUoscyphiis Corda. 
1. Underleaves 4-parted; involucral leaves 2-cleft; perianth 2-3 
lobed, the lobes long and lacerate-toothed. 
adscendens Hook, and Wils. 
Underleaves bifid. 2. 
2. Involucral leaves 2-toothed; perianth 3-lobed, the lobes spinose— 
dentate. pallescens Dumort. 
Involucral leaves slightly 2-toothed; perianth 3-lobed, the short 
lobes nearly entire. polyanthos Corda. 
Conocephalus Neck. 
Thallus dichotomous, reticulate and porose. Antheridia imbedded 
in an oval disk, sessile near the apex of the thallus. Spores 
large, muriculate, brown. Dioecious. coniciis Dumort. 
Diplophyllmn Dumort. 
Stem acsending, nearly rootless; leaves closely folded and subden- 
ticulate, with or usually without a pellucid line near the base, 
the lobes obtuse or acutish, the lower oblong-scymitar-shaped, 
coarsely dentate, the upper smaller, subobovate. 
albicati'i Dumort. var. taxifolium Nees. 
Dtunorticria Nees. 
Thallus thin, soft, forking, usually with scattered hairlike rootlets 
beneath, naked or with a delicate, appressed pubescence 
above; peduncle chaffy at apex. Spores muriculate. Dioe- 
cious. hirsuta Nees. 
F imhriaria Nees. . — 
Thallus simple or bifurcate, mostly conspicuously porose, with 
scales below, their hairlike ends surpassing the leafborder in 
shape of a long white beard. Antheridia immersed in the 
thallus. Spores roundish-angular, subreticulate. 
tcnclla Nees. 
Fossombronia Raddi. 
1. Plant minute; stem forked or fastigiately divided; spores pale 
fuscous, more or less tuberculate. cristida Aust. 
Plant large or of medium size; stem mostly simple. 2. 
2. Spores brown, depressed-globose-tetrahedral, crested, the slender 
(l()-24) crests pellucid, rarely confluent. pusilla Dumort. 
S]3ores reticulated and pitted. 3. 
3. Spores yellowish brown, globose-tetrahdral, not depressed, deeply 
reticulated, the 7-9 reticulations large and deep, 5-6 angled 
and winged. angiilosa Raddi. 
Spores yellowish to dark brown, globose-tetrahdral, less deeply 
reticulated, and pitted, the 12-18 reticulations 4-6 angled 
and indistinctly crenate. Diimortieri Lindb. 
Fridlania Raddi. 
1. Perianth smooth; leaves marked by a central moniliform row of 
cells or by a few large scattered cells; lower lobe cylindric- 
saccate. 2. 
