il8 BULLETiN DE l'herbier boissier. Exormotkeca. 



EXORMOTHECA iVIitt. 



in Godman Hist. Azores, p. 325. 



PJanlae thallosee, parvae, tenerae vel majores et robuslae, virides vel fla- 

 vicantes, in una hyalinae. Frous simplex vel parum ramosa, hnearis vel 

 ligulata, antice subplana, stratiim antimm vel humile stomatis alle 

 cylindricis instructum vel altissimum (stomatis confluentibus) ; in 

 lundo slrati lamellileri adsunt fila clilorophylll/era simplicia, maxime 

 aggregata. Costa postice valde producla. Squam.se poslica3 niagnse, dense 

 imbricattt', obtuste vel acuminata?, sub apice in facie externa appendiculo 

 filiformi vel dendroideo instructae. Inflorescentia monoica et dioica, 

 Andrcecia in niedio frondis pulvinata, bene delinila, haud lamen disci- 

 formia neque paleis cincla. Carpocephala pedunculata vel sessilia, e 

 fundo nudo alveoli apicalis, stepe ante sinum dichotomia? orta; pedim- 

 culo sulco profundo percurso, apice nudo. Receptacula globosa, ver- 

 tice haud slomatifera. strato chlorophyllifero tecta. Archegonia plura 

 (1-5) seriata. Involucra geminata, opposita; recte patentia cupuliformia 

 vel conchaeformia, ore plus minus late aperta, sublus vaginatim angus- 

 tata vel aperto-decurrentia. Capsnla sphaerica irregularitei" valvatim rum- 

 pens, pedunculo perbrevi, bulbo magno inserla; pariete unistrato, annu- 

 latim incrassato, rufo-brunneo. Operculum cellulis majoribus distinctum, 

 intus cellulas elateriformes pendulas maximeque incrassatas gerens. Ela- 

 teres flavescentes, laxebi- tri-spiri. Sporae in facie convexa vel primatice 

 areolatae et angustat», Iceves vel minute papulosa'. 



1. Exormotheca pustulosa Mitt. I. c. 



Monoica vel dioica. Frons viridis, parva, usque ad 12 mm. longa, sim- 

 plex vel furcala, linearis, canaliculata vel subplana, crassa, marginibus 

 attenuatis; costa postice valde producla lateque rotundala, sensim in alas 

 excurrens; squamae postic» marginem haud excedentes, hyahnaevel pur- 

 pureae, late lunatse, apice duplo angustiores lateque rotundat» vel obtuse 

 breviterque bilobae, margine obtuse denticulatae, appendiculo flliformi, 

 apice geniculatim erecto. Stratum anticum humile; epidermis ob slomata 

 confertissima nulla. Stomata conico cylindrica, 3 plo longiora quam lata 

 contigua, ore parvo elliptico, parvis cellulis cincto; fila chlorophyllifera 

 brevia dense aggregata, sub antris longiora el in lumen stomatorum pro- 



144 



