SESS ee eS ese fe 
1887. | BOTANICAL GAZETTE, 3 
Obtuse, cells pellucid, operculumconic . . . -% obtusifolius. 
Apiculate, operculum with acicular beak : ; .10. osmundoides. 
{| Leaves with a thick reddish border. 
Plants submersed, rigid . : ‘ ; : . 11. rufalus. 
* * Fruit lateral. 
-+— Leaves without a border. 
Obtuse, entire, plants 2-5 cm. high, fruit sub-terminal . 12. polypodioides. 
Rounded at apex, irregularly serrate, 1-2cm. high, fruit 
sub-basal . : : ‘ : ; : . 13. sub-basilaris. 
Mucronate, regularly serrulate, fruit basal or sub-basal . 14. taxifolius. 
+- Le bordered by several rows of paler, often 
incrassate, cells, 
Capsule cernuous, leaf-cells minu : p : . 15. Floridanus. 
Capsule erect or inclined, flowers dioicous, leaf-cells ob- 
scure ; : ‘ ‘ ‘ ; ; : . 16. decipiens. 
Capsule erect or inclined, flowers monoicous, leaf-cells 
distinct . : ‘ pets : : . 17. adiantoides. 
22. Pachyfissidens Mutter: Syn. Muse. 1. 45,—Leaves rigid, 
composed of more than one layer of cells, opaque. 
Plants growing in water or very wet places. - - 18. grandifrons. 
23. Octodiceras Brive: Sp. Muse. 1. 162.— Plants aquatic, fili- 
form, floating. 
Plants large, much branched, pedicel shorter than the 
Chins ee a 
Plants small, little branched, pedicel longer than the 
capsule . é : . ? ‘ : ; . 20. Hallianus. 
1. F.limbatus SuLirvant: Pac. R. R. Rept. 4. 185. t. 1. 
LESQUEREUX: Trans. Am. Phil. Soc. 13. 3.—Mem. Cal. Acad. 1. 7.—BOLANDER: Cat. 37.— 
WATSON ; Bot. Calif. 2. 374.—Lesq. & JAMES: Man. 82.—Mrrren; Jour. Linn. Soc. 
21. 556. 
Coun. : Sunt. & Lesg. Musei Bor. Am. 2 ed. 105. 
Plants small, 2—5 mm., yellowish green or in wet places bright green, 
gregarious: stem simple: leaves on sterile plants 8-12 pairs (on fertile 
plants fewer), oblong lanceolate, apiculate r+ somewhat acuminate; bor- 
der hyaline, widening from apex to base except on inferior lamina, very 
wide at base of vaginant lamina; costa thick, sub-percurrent; cells small, 
81212», arranged in rows, densely chlorophyllose, sub-quadrate, more 
irregular in vaginant lamina, which is one-half to three fourths the length 
of leaf: flowers monoicous; male gemmiform, axillary; female terminal: 
fruit terminal; pedicel 6-10 mm. long, flexuous, yellowish-red; capsule 
green, sub-oval, unsymmetric, cernuous ; teeth red, inserted below the 
mouth, much introflexed, deeply split; lid red, conic-rostrate, one-half 
length of capsule; spores 12-16», usually 14 ». 
