254 
nente, cireumdata, nervo angusto pallido in subula evanido per- 
cursa; cellulis alaribus copiosis quadratis seriatis aureis, in medio 
foli cellulis parvis incrassatis.ovatis usque ad apicem dense seria- 
tis; cetera desunt. 
Nr. 7898, 9087. 
Ex habitu Dierani insignis C. M. sed gracilius, diviso-ramo-. 
sum, superne pallescens, et foliis tortuosis indestincte falcatis, cellulis 
alaribus quadratis, in medio foli ovatis, differt; a Dicrano Bri- 
deliano C. M. gracilitate, colore pallescente, foliis brevioribus tor- 
tuoso-faleatis, totoque habitu diversum. 
22.  Diceranum (Campyl. rectis.) discriminatum n. sp. 
Dioicum, dense ezspitosum adscendens, basi fuscatum, superne 
intense lutescens, vel aurescens, 1—2-unciale. Caulis robustius- 
eulus inferne fusco-tomentosus, superne diviso-ramosus, ramis apice 
acutis, parce falcatis. Folia caulina dense imbricata, subsecunda, 
humida erecto-patentia, strictiuscula, e basi concava latiore lanceo- 
lata canaliculato-subulata, apice earinato dorsoque remote denticulata; 
nervo planissimo lato striato, tertiam folii partem superante lutes- 
cente, in subula opaco, cellulis alaribus rotundato-angulatis, in 
orbem convexum dense congestis; interstitiis crassioribus sanguineis 
retieulatis ineonspieuis, tandem diaphanis, cellulis sequentibus late- 
ralibus oblique rectangulis, superioribus dense aggregatis minimis 
ovalibus. Folia periehstialia, e basi latiore et longiore vaginante, 
oblongo-lanceolata, abrupte subulata, quasi aristata, striata, cellulis 
in superiore parte ellipticis. Seta solitaria brevis inter ramos in- 
serta 8'^ longa, strieta, lutescens, humore immutata. Theca parum 
curvata adscendens, anguste oblongo-cylindrica , Sicca striata, ore 
nigrieante rubens, deoperculata magis cylindrica, reetior; operculo 
conieo-subulato recto, thecam sub:wquante. Peristomium pyramidale 
sanguineum, dentibus lanceolatis elongatis crasse trabeculatis, apice 
bifidis pallidis. —Calyptra glabra lutescens, basi: hyalino-fimbriata, 
thecam fere totam includens. 
Sub 7147 statu majore optimo, cum JDierano controverso; sub 
