378 BOTANICAL GAZETTE [May 
0.8 ™™ crassa, operculo ignoto. Peristomium perfectum, ciliis 
appendiculatis. Sporae 15 crassae. Dioicum videtur (floribus 
masculis ignotis). Plate XXIV. 
British Columbia: New Westminster (A. J. Hill, 1902; herb. C. F. 
Baker). 
By the habit, dioicous inflorescence and very rough pedicel this moss 
stands near &. asperrimum (Mitt.) Kindb. and B. Washingtonianum Eaton, 
differing from both in having the leaves scarcely plicate, almost smooth, with 
the acumen much longer and narrower, and the borders very slightly denticu- 
late or subentire and partly revolute. 
Plagiothecium sulcatum Card. &.Thér., sp. nova.— Monoicum, 
laxiuscule depresso-cespitosum, nitidulum. Caulis gracilis, 
repens, ramis ascendentibus, subarcuatis, circa 1™ longis, com- 
pressulis. Folia ramea laxe subdisticho-homomalla, 1.2~1.5™™ 
longa, 0.4—0.5™™ lata, haud decurrentia, lanceolata, sensim longe 
acuminata, marginibus planis, e medio, nonnunquam e basi serru- 
latis, costa gemella, nunc brevi, nunc longiore et uno crure fere 
ad medium producta, cellulis anguste linearibus, 70-90 longis, 
6p latis, inferioribus brevioribus, laxioribus, non porosis, 20-40 # 
longis, 12-15 latis. Flores masculj prope femineos nascentes. 
Folia perichaetialia erecta, appressa, enervia, breviter ovata, apice 
rotundata, apiculo erecto brevi abrupto. Capsula in pedicello 
pallide purpurascente, tenui, flexuoso, 2° longo, subhorizontalis 
inclinatave, 2™" longa, 0.7™ crassa, subcylindrico-arcuata, vacua 
infra orificium contractula, tam juvenilis quam matura profunde 
sulcata, operculo obtuse conico. Annulus duplex. Peristomium 
perfectum, 0.42™™ altum, ciliis nodulosis, minute papillosis. 
Sporae laeves, diam. 124. Plate YXIV. 
N. Minnesota: on Fall Lake, near the foot of Kawasatchong Falls, 1! ” 
north of Ely (J. M. Holzinger, 1897. Sent as P. Muehlenbeckii Br. Eut-). 
moss seems somewhat intermediate between P. sfriate//um Lindb. 
Eat Waianae Br. Eur.) and P. silestacum Br. Eur., differing from the 
former by its non-decurrent leaves, narrower at base, with a more distinct 
costa, its much longer cells, the basilar ones not porose, its more arcuate Cap- 
sule, and the form of its perichaetial bracts; and from the latter by its caP- 
sule being deeply sulcate, even when young, and its more compressed 
branches, According to the description, P. pseudosilesiacum Sch. differs 
from our species by its much shorter pedicel (1°), and its ecostate leaves. 
