55 



3. Species dubiae. 



23. O, PUBESCENs Raf. in Desv. journ. bot. IV. 273. Desv. prod. fil. in ann. soc. bn. 

 paris. VI. 193. 



Habitat in America boreali (Raffinesque). 



24. O. STiPATLM CoUa in mem. acad. taur. 1836. • 

 Habitat in Ciiiie (Ijcrlero). 



2h. O. LouREiRi ANUM. — O. lusitanicum Lour. fl. coch. ed. Willd. II. 825 (excl, synon. Lin.). 

 Habitat in locis planis et humidis Gochinchinae et Chinae tempore autumnali ac cilo 

 periens (Loureiro). 



4. Species vix notae. 



Quid Ophioglossi spcc. ex Congo, in R. Brown verm. Schrift. ed. iNees. I. 283, 

 Quid Ophioglossi spec. dub. Kunze fil. Leibold. in Linnaea, XVIIL 306. — Ilabitat 

 in Mexico (Leibold pl. mex. exs. n. 81). 



Quid Ophioi;lossi spec. dub. Kunze fil. Leibold. in Linnaea, XVIII. 306. — Habitat in 

 Mexieo (Leibold pl. mex. exs. n, 82). 



III. OPHIODERMA Endl. v 

 Ophioglossi spec. Lin. — Ophio;jlossi sect. 2. Ophioderma Bluine. 



Froris fasciaeformis. Venae exima liasi frondis exorientes, crebraCj flabellatae, ramosae, 

 venulisque in maculas elongato- vel longissime hexagonoideas simplices anastomosantcs, venulis 

 liberis nullis. Spica e medio frondis proveniens, pedunculata, linearis, compressa. Sporangia 

 biserialia, maigini racliis adnala, horizontalia, connata, globosa, ab apice ad basim in valvas 

 duas hemisphaericas demum ringenti-patentissimas dehiscentia. 



Herba parasitica. Rhizoma subglobosum. Frons uni - quadripedalis, sessihs, soli- 

 taria aut fasciculata, fasciaeformis , plana, carnosula , exsiccata coriacea, indivisa aut sac|)ius 

 epicem versus semel vel bis dicliotome divisa, laciniisque obtusa, basim versus longissime 

 angustata. Fasciculi vasorum in ima basi frondis septem, in circulum dispositi, teretes, tenuis- 

 simi. Costa nulla. Venae crebrae, inlernae, lenues, exsiccatae versus basim frondis promi- 

 nulae, ex ima basi frondis flabellatae, ramosae, venulisque in maculas hexagonoideas elongatas 

 subinde longissimas (bi- tripollicares) anastomosantes, niaculis simplicibus i. e. alias maculas 

 minores seu secundarias teriiariasque non continentes, venulisque liberis intra maculas vel 

 infra marginem frondis nullis. Spica in parle inferiori frondis obveniens, e vena nicdia unica 

 vel pluribus liic loci paululum inciassata exoriens hinc revera lateralis, plerumque solitaria 

 rarius gemina, pedunculo semi- usque bipollicari compresso lineam lato nervoso-striato apice 

 latescenti insidens, usque septem pollices longa, duas usque semilertiam lineam lata, linearis. 



