2 BOTANICAL GAZETTE. | Jan., 
FISSIDENS Hepwic. 
Fissidens Pane Fund, Muse. 2. 91. — SULLIVANT: Mosses of U.S, 24. — Lesa. & 
JAMES: Man. 8 
icranum AUCT. 
Skitophyllum DE LA ee gh Desv. Jour. Bot. 6, 133 
Saat aa: exe 
he “We use 
Conomitrium enicn NE: Soi, .. ie Il. 8. 245.—SULLIVANT: Mosses of U. S. 25.— LEsQ” 
JAMES: Man, 89, 
Plants large or small,simple or branched, gregarious or cespitose, ter- 
restrial or aquatic: leaves distichous, conduplicate below, often equitant 
and clasping, the back produced into a prominent vertical wing with a 
sub-percurrent or excurrent costa; cells parenchymatous, all chlorophyl- 
lose: flowers monoicous, pseudo-dioicous or dioicous: fruit terminal or 
lateral; pedicel usually long; teeth sixteen, long, deeply bifid with the 
unequal divisions rough, or short and ieee calyptra cucullate, 
mitrate or conic; operculum conic or rostra 
: On the ground, rocks or trees, or in water; in all parts of 
the worl ‘Wat chiefly dipicat’ not alpine 
A very large genus of over three hundred described species, repre- 
sented in North America by twenty species, which ma y be characterized 
and arranged in a fairly natural order as follows: 
21. Eufissidens Mutwer: Syn. Muse. 1. 50, — Plants terrestrial 
or submersed but not floating : leaves soft, of one layer of cells. 
* eh gion 
-— Me 8 axillary. 
Leaf-cells small, densely Dacca ass in distinct rows 1. limbatus. 
Leaf-cells larger, not “—— iia eae nor in dis 
tinet rows. 
2. bryoides. 
++ + Dioicous or monoicous with the dicle hues dccnidacid on @ rooting, branch 
at the base of the female stem 
Leaf-cells 14-2 times as long as ~ pt distinct. 
Plants less oe 1 mm. high, leaves 2 or 3 pair . 8. Closteri. 
Plants 2-4 mm. re weg wholly hyaline, leaves 3-5 vildre . 4, soteseaey 
uf-cells almost or quite isodiametric, often obscu 
" thes ih a@ narrow border, at least on vaginant lamina 
MA 
Marginal ion ae not Fs Soma : 5. ineurvus. 
Costa RIAA 1s fe ae met Le et, Oe een, 
Costa ceasing below apex . 7. Garberi. 
without a. border. 
4] Leaves 
Acute, cells densely chlorophyllose, obscurely papillose . 8. Donnellii. 
