ICONES MUSCORUM. 83 



DICRANUM DEBILE, Hook, et Wils. 



Tab. 20. 



Plants humiles, graciliores, gregaria3 vel caespitulosae, flaves- 

 centi-virides. 



Caulis subsemiuncialis, simplex vel ssepius e basi pluries divi- 

 sus, erectus vel ascendenti-erectus. 



Folia minima, dissita, lineari-oblonga, ascendendo majora 

 longiora confertiora, suprema longissima, subsecunda, carinato- 

 concava, marginibus recurvis subundulatis ; reti laxiore oblongo ; 

 costa valida semitereti cum vel sub apice obtusiuscula desinente. 



Flores dioici : masculi subcapituliformes, in plantis femineis 

 minoribus terminales. 



Capsula ovalis, erecta, operculo subulirostro ipsam aequante 

 instructa, annulata ; pedicello mediocri ; peristomii dentibus in- 

 ferne purpureis striolatis, in crura duo longa scabra fissis. 



Dicranum debile, Hook. & Wils. in Drumm. Muse. Amer. Coll. 2, No. 51 & 

 52 ; Sulliv. & Lesqx. Muse. Bor.-Amer. Exsicc. (ed. 1), No. 46 b ; Sulliv. 

 Mosses U. States, p. 13. 



Trichostomum tenue, Sulliv. Muse. Alleghan. No. 177. 



Weissia exigua, Schwaegr. Suppl. t. 179? ex Wils. in Lond. Jour. Bot. 

 1844. 



Hab. Banks of ditches and roadsides, Louisiana and Alabama. 



TAB. 20. — Dicranum debile. 



1. Plantae naturaii magnitudine. 12, 13. Capsulse. 



2. Planta fertilis. 14. Pars peristomii. 



3. Planta mascula. 15. Sectio verticalis ejusdem. 



4. 5, 6, 7, 8. Folia. 16. Operculum. 



9. Areolatio f'olii baseos. 17. Folium perigoniale. 



10. Eadem folii apicis. 18. Antheridium et paraplivsis. 



1 1 . Seetiones trans, folii. 



3 



