GYMNOSTOMUM. 391 



Perichaetialia plurima, erecta; exteriora foliis caulinis similia 

 sed vena excurrente longe aristata, reliqua intus gradatim 

 magis magisque meinbranacea, apice bifida sinu longe aris- 

 tigero, laciniis integris vel breviter laciniatis, intima minima 

 fere omnino membranacea. 



Seta subnulla. Vaginula brevis conica, albida. Parapliysea 

 paucae vel subnullse. Pistilla 3 — 5 breviter stipitata stylis 

 longissimis. 



Capsula alba, magna, oris margine irregulari. Membrana in- 

 terna discrete, insidens stipite brevi conico, capsulae ope 

 filamentorum cellulosorum adhaerens, ore constricto irregu- 

 lariter lacero, Peristomium sub-16-plicatum, niveum. Co- 

 lumella inclusa, plana, latissima. Sporula globosa, laevia, 

 valde irreguiaria, in acervulo leete viridia. 



Operculum conicum, obtusum, vel acute rostratum, cum colu- 

 niellae apice secedens. 



Calyptra subulata ad apicem usque fere fissa, operculi longitu- 

 dine. 



D. folioso proximum. 



1. 



Plant magnified. 



2. 



Capsule and Perichretial leaves. 



3. 



Capsule and Paraphyses laterally. 



4. 



Ditto, front view. 



5. 



Capsule long section. 



6. 



Capsule removed, inner membrane and base of capsule 





remaining. 



7. 



Portion of capsule with operculum. 



8. 



Operculum. 



9. 



Ditto, long section. 



10. 



Ditto, Ditto, base with capsule. 



11. 



Apex of capsule. 



12. 



Portion of ditto. 



13. 



Portion of Peristome rather expanded. 



14. 



Inner membrane detached and laid open. 



15. 



Columella. 



16. 



Sporula. 



17. 



Leaf. 



