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Section 2. Fimicinez. Ramification not 
dichotomous. Leaves developed, frondose. 
Sporangia not single and never on the upper 
surface of the leaf. 
OrpEr 1. RHIZOCARPAL. Sporangia in 
sporocarps (conceptacula); heterosporus; mi- 
crosporangia, o-spored; macrosporangia gen- 
erally 1-spored. 
Family 1. MARSILZACEZ. 
Sporocarps 2-4-celled, 2-4-vulved, contain- 
ing macro- and microsporangia. Sporangia 
parietal; macrosporangia, always l-spored. 
Vernation circinate. 
1, Marsilea L. 
Macro- and microsporangia in the same spo- 
rocarp.—2f. Fronds petiolate, 4-foliolate. 
1. M. vestrra Hook. & Grev.—Fort Point. 
(Extinct.) ” 
2. Pillularia L. 
2. Fronds filiform. om 
1. P. Americana Al. Braun.—Marin County. 
Family 2, SALVINIACEZ, 
Sporocarps2to o, on the same petiole 
(transformed half of a frond), macro- and mi- 
crosporangia in distinct sporocarps. Verna- 
tion not circinate. 
