388 Roll, Vorläufige Mittheilnngen. 



tialia majora; omnia e cellulis minutis rotundis tirmis membranam 

 glabram nitidulam obscuro-viridem sistentibus areolata; thecae 

 breviter pedicellatae immersae majusculae hemisphaericae macro- 

 stomae exannulatae saepius aggregatae, operculis e basi planiuscula 

 oblique rostellatis; peristomii dentes majusculi late lanceolati planis 

 finis intense rubri latiuscule trabeculati apice perforati et irregu- 

 lariter fissi. 



Patria. Washington: Ellensburgh, ad rupes irroratas prope 

 Thorp, 1. Junius 1888 c. fr. maturis. 



A Grimmia apocarpa foliis longis inermibus atque habitu cincli- 

 dodontes raptim distinguitur. 



Grimmia (Khacomitrium) speciosa C Müll. sp. n. dioica; 

 cespites latissimi laxissime intricati robusti viridissimi; caulis robustus 

 elongatus rarais longiusculis dichotome divisus ; folia caulina conferta, 

 madore raptim distinctissime squarroso-recurva dimorpha; inferiora 

 seniora e basi late ovata multoties leviter plicata longiuscula de- 

 currente late acuminata obtusata cucullata, superiora juniora in 

 pilum robustum longiusculum hyalinum striato-reticulaturn denti- 

 culato-serrulatum producta; omnia margine inferiore usque ad medium 

 vel ultra lato-revolute integerrima, nervo lato profunde canaliculato 

 excurrente, cellulis ad angulum decurrentem laxe parenchymaticis, 

 basilaribus longiusculis crenulatis ultra medium magis rotundatis, 

 omnibus in membranam glaberrimam nitidulam veluti conflatis teneris 

 indistinctis ; perichaetialia in cylindrum breviusculum involuta 

 apice truncatula exesa; theca in pedunculo brevi glabro spirali 

 flaccido erecta longiuscule cylindrica ore angustato glabra aetate 

 leviter plicata, operculo e basi angustissime conica in rostrum lon- 

 giusculum calyptra longe subulata apice leviter asperula persistente 

 basi in lobulos latiusculos 16 obtusos laciniata obtecto, dentibus 

 longissimis strictissimis obscure rubris glabris usque fere ad basin 

 bifidis; annulo nullo. 



Patria. Vancouver Island, Victoria, 22. Majo 1888. 



E speciosissimis, quoad magnitudinem surculi, formam foliorum 

 et peristomii a Grimmia aquatica vel a c i cul a r e toto coelo distincta. 

 Bhacomitriumvarium Mitt. foliis madore erecto-patulisjam longe diftert. 



Guembelia (Euguembelia) tenella C. Müll. sp. n. ; dioica; pulvinuli 

 parvi obscure viridis ; caulis inferne fasciculatim divisus tenellus, 

 ramulis parallelis parum flexuosis tenuibus; folia caulina erecto- 

 horrida vix crispula, madore valde erecto-patula subulata anguste 

 oblongo -acuminata, in pilum breviusculum hyalinum strictiusculum 

 vel paululo flexuosum tenuem acutatum leviter asperulo-denticulatum 

 exeuntia, margine integerrimo erecta vel vix involuta, nervo pro 

 foliolo latiusculo excurrente percursa, e cellulis ubique chlorophyl- 

 losis mollibus parvis basi folii quadratis, apicem versus magis rotun- 

 datis carnosulo- areolata; perichaetialia majora latiora; theca in 

 pedicello breviusculo perichaetium vix superante tenero erecta 

 minuta oblonga truncata leptoderma aetate pallescens glabra, oper- 

 culo minuto oblique rostellato, dentibus parvis tenellis; calyptra 

 angusta dimidiata. 



