ICONES MUSCORUM. 



FISS1DENS EXIGUUS, Sulliv. 



Tab. 23. 



Plant.e perpusillae, annuse, laxius densiusve gregaria3, flavo- 

 vi rides. 



Caulis sublinearis, erectus vel declinatus, basi sola radicans. 



Folia 4-6-juga, in caulibus erectis explanata, in declinatis 

 ad unura latus vergentia, oblongo-lanceolata, acuta, superiora 

 inferioribus multo majora, immarginata, integerrima ; lamina 

 apicali duplicaturam sequante, dorsali ad basin folii evanida ; 

 costa subflexuosa fere ad apicem attingente. 



Flores dioici : masculi diphylli in plantis femineis similibus 

 terminales ; antheridiis 3-4 ; paraphysibus nullis. 



Capsula ternrinalis, erecta, oblongo-ovalis, in pedicellum me- 

 diocrem defluens ; peristornii dentibus ad medium fissis ; oper- 

 culo rostellato ; calyptra dimidiata. 



Fissidens exigdus, Sulliv. in Mem. Amer. Acad. n. ser. 3, p. 60, t. 2 ; 

 Muse. Alleghan. No. 182 ; Mosses U. States, p. 24. 



Hab. Stones in moist and shaded ravines, dry channels of 

 woodland brooks, <fcc. — Common. 



Resembles the European F. exilis, but that has subserrulate 

 leaves and a inonoicous inflorescence. 



TAB. 23. — Fissidens exiguus. 



1. Plantje naturali magnitudine. 



2, 3. Plant jc fertiles. 



4. Planta mascula. 



5. Frons infertilis. 



6. 7, 8. Folia caulina. 



9. Apex folii areolationem exhibens. 

 10, 11. Capsulae. 



1 2. Pars peristornii. 



13. Sectio verticalis ejusdem. 



14. Calyptra. 



15. Antheridium et foliuni perigoniale. 



