Roll, Vorläufige Mittheilungen. 423 



longe et tenuiter acuminata, lenissime plicatula, marginibus sinuo- 

 latis, vel denticulatis, plerumque medio planis, basi et in acumine 

 revolutis; costa ultra medium vel ad a /3 folii producta; cellulis 

 angustis, elongatis, linearibus, alaribus paucis, subquadratis. Dioicum 

 videtur (floribus masculis liaud visis). Cetera ignota. Vancouver 

 Island: Victoria. 



Brachythecium pseudo-Starkii Ren. et Card. spec. n. Dioicum, 

 laxe caespitosum, viride. Caulis erectus vel ascendens, 5 — 8 cm 

 longus, flexuosus, laxe pinnatus, ramis elongatis, attenuatis. Folia 

 sat remota, patula, ovato-lanceolata, plicata, acuminata, acumine 

 longiuscula plerumque torto, marginibus undique serratis, costa usque 

 in acumen producta; cellulis lineari-rhomboidalibus, elongatis, atte- 

 nuatis, alaribus laxioribus, mollibus, quadratis, hyalinis. Cetera 

 ignota. Washington: Tacoma. 



Raphidostegium Roellü Ren. et Card. spec. n. Monoicum, 

 tenellum, dense caespitosum, nitidum, lutescenti-viride. Folia sub- 

 homomalla vel complanata, oblongo-lanceolata, decurrentia, acumi- 

 nata, marginibus planis vel reflexis, superne denticulatis, costa 

 gemella brevi saepe subnulla, cellulis elongatis, anguste linearibus, 

 alaribus valde dilatatis, mollibus, hyalinis vel lutescentibus. Folia 

 perichaetialia longe acuminata, superne grosse et irregulariter dentata, 

 nervis binis obsoletis. Capsula in pedicello purpureo oblique erecta, 

 oblonga, rufo-badia, subsymmetrica , operculo ignota. Peristomii 

 dentes longe subulati, valde lamellosi, processus integri vel in carina 

 anguste rimosi; cilia plus minus elongata, nodulosa. Flores rnasculi 

 parvi, gemmiformes, prope femineos nascentes. Washington: 

 Enumclaw. 



Amblystegium Sclüotthaueri Ren. et Card, subsp. n. Formis 

 compactis A. serpentis habitu simile, sed differt pedicello crassiore, 

 valde dextrorsum torto, Capsula erecta vix curvata, ovoidali, ore 

 dilatato, basi collo elongato plicato instructa, ciliisque peristomii 

 interni brevioribus, solitariis. Rocky Mountains: Yellowstone Park 

 (Wyoming). *. 



Hypnum polygamum Seh. var. longinerve Ren. et Card. A forma 

 typica differt: foliis plerumque angustioribus, longius acuminatis, 

 costa validiore, longiore, in acumen producta, Capsula pallidiore 

 angustiore. Victoria, Vancouver Island. 



Hypnum aduneum Hdw. var. filiforme Ren. et Card. Caulis 

 tenellus, gracilis, filiformis, elongatus, flexuosus ; folia parva, erecta, 

 vix subseeunda. Wisconsin: Princeton; Idaho: Pend d'Oreille Lake. 



Hypnum Heufleri Jur. var. Villardi Ren. et Card. A forma 

 typica differt foliis brevius acuminatis, haud vel vix plicatis cellu- 

 lisque alaribus magis numerosis. Rocky Mountains: Montana, Helena. 



Hypnum Dieclui Ren. et Card. sp. n. Caespites lutescentes vel 

 rufescentes. Caulis depressus, pinnatus, ramis ascendentibus. Folia 

 falcato-secunda, valde circinata, e basi late ovata sat subito acuminata, 

 acumine basi plicato, apice acuto vel subulato, marginibus planis 

 integerrimis , rarius superne obsolete denticulatis, costa gemella 

 brevissima, interdum subnulla vel longiore usque ad medium producta; 

 cellulis linearibus, angustissimis, obtusis, alaribus magnis, valde in- 



