^ 
Maciian; Pleuridiinn; Hcoheria ; TrachypodliaUy 
Fontinalis etc. 
Class. II. Pteridea.e (Vasculoso-cellulares). 
O. 1, Ly copodiaceae — Surculus tracheis praeditus, 
sporangia sessilia (mascula et foeminea?) ad axillas 
foliorum v. bractearum aut e sinubus foliorum 
producens: 
Lycopodiinn^ T?7iesipterisy Psilotimi. 
O. 2, Filices. — Caudex hjpo — v. epigaeus, foliis 
tracheariis perfectis vestitus; soris sporangiorum 
e nervis foliorum oriundis, laminae eorum innatis. 
Quibusdam folia, parenchymate perfecte orbata, 
in organa fructificationis evolvuntur: 
Ophioglossinn^ Potrychium^ — Scliizaeaj Anei~ 
mia, Osmunda^ GleicJienia^ Platysoma j IS/larat* 
tia^ — Acrostichum^ Heinionitis^ Graminitis^ Ca^ 
teracli^ Polypodium^ TVoodsia; Struthiopteris^ O- 
noclea; IV oodwardia^ Plec/inwn^ Scolopendrium^ 
Aspleniuni', Lonchitis^ P teris; Lindsaya^ QheiU 
anthes , Adiantum ; T)av allia; Aspidiuin; Cya» 
tliea; Trichomanes^ HymenopJiyllinn, 
O. 3. Equisetaceae. — Caulis trachearius , et 
vaginatus v. verticillato- ramosus, producit amen- 
ta terminalia, e squamis peltatis, subtus sporangia 
hermaphrodita? gerentibus, constantia : 
Eqidsetum, 
O. 4. Marsileaceae. — Folia passim petiolata, 
parcis tracheis praedita, ad basia petiolorum spor^ 
