— 15 — 



mosa, rnrius acropora, plcriimque in sorosorbiculares, glo» 

 bosos, oblongos V. linearcs et longissimoscoiiferla, raro pauca 

 V. solitaria. Sori e rachi, venis venulisve foliorum, passim in 

 receptacula punctiformia v. majora-globosa, elongata v. lon- 

 gissima tumentibus, imposita v. ad rachin solam residuam, 

 passim alalam spicati, nudi, pilosi v. indusio supero, infero 

 V. laterali, scarioso, raro coriaceo, deciduo v. dur.ibili, vero 

 V. spurio, tecti v. involucrali. Sjiorce copiosae, forma variae, 

 episporio figurato ^:^, ruptili v. trifido, et endosporio, globu- 

 lis minorib. hyalinis et majorib. oleosis (guttuhs) pleno, ger- 

 minantes in proembryon foliaceum, radicans, bilobum, spe- 

 ciem suam e tul^erculo evolvens , evanidum -< extendendae. 



Praemissa tali ordinis descriptione, familiae Fihcum 8 

 (v. 10, Fihcibus protogeae haud inclusis) paucis adumbrandae 

 erunt. 



Subordo I. Exannulatae: 5porangia exannulata v, 

 annulo rudimentario , incompleto -< : 



F A M. 21. B O T R Y C H I A C E JE nob. 



Filices pusillae et majores, anomaloe; caudex parvus, pro- 

 dens foha gemina , petiolis passim connatis, v. bi-tergemina, 

 crassiuscula, dimorpha, nov. stricta: alterum sterile, integrum, 

 reniforme, reticulato - venosum , v. palmati - pinnatifidum et 

 decomposito- sectum, alterum fertile, ad rachin simplicem v. 

 pinnatam reductum, sporangiis solidis, exannulatis, sessilib., 

 bifidis, distichis, discretis v. connatis, onustum. Sporae glob., 

 ellipsoideae v. sublrilobae. (In vagina folior. Botrychii Luna- 

 riae ssepe folia novella latent.): — PhylloglossumP^ Ophioglossum^ 

 Ophiodermay Helminthostachjs ^ Botrjchium. 



F A M. 22. O S M U N O A C E JB. 



Caudex brevis, foha plura, pinnatifida v. bipinnatisecta •<, 

 raches et venae teretes, utrinque prominulae, segmenta foliac. 



