364 BOTANICAL GAZETTE [MAY 
12m latae, mediae superioresque angustiores, 29-30u longae, 5 4 
latae, opacae, parietibus incrassatis. Capsula in pedicello erecto, 
brevi, 0.4™" longo, immersa, ovata, leniter gibbosa, obtusissime 
apiculata, laevis, matura fusco-lutescens, 1 ™™ longa, 0.6™™ crassa. 
Calyptra cucullata, tertiam dimidiamve partem capsulae obtegens. 
Sporae_ elliptico-subglobosae, minutissime papillosae, 24-30 
crassae. Dioicum videtur (floribus masculis ignotis). Plate 
California: on ground in old pastures, foothills near Stanford University 
(C. F. Baker, 1902). 
Var. elongatum Card. & Thér., var. nova——A forma typica 
differt caulibus altioribus foliisque superioribus longioribus et 
magis flexuosis. 
California: on wet clay soil, foothills near Palo Alto (C. F. Baker, 1902). 
Distinguished from P. suéu/atum Br. Eur. by the shorter and less finely 
subulate leaves, with a broader costa. The latter character also separates 
our species from P, Bolanderi C. Miill., which, besides, has the leaves dis- 
tinctly denticulate on the margins from the middle upward. P. Ravenelit 
Aust., of which we have seen no authentic specimen, according to the descrip- 
tion has carinate leaves, excurrent costa, and synoicous inflorescence. If 
the inflorescence of P. Bakeri is, as we think, really dioicous, this character 
would distinguish it from all the other North American and European species 
of Pleuridium. 
DICRANELLA CuRVATA Sch. var. missourica Card. & Thér., var. 
nova.—A forma typica differt capsula minus distincte striata et 
areolatione foliorum e cellulis latioribus brevioribusque composita. 
Missouri: Seligman, on ground (B. F. Bush, 1898). 
Dicranum alatum (Barnes) Card. & Thér., sp. nova. (D. Bon- 
jeant de Not. var. alatum Barnes, Bot. Centralbl. 44: 386. 1890). 
—Atroviride, dense cespitosum, intus tomentosum, 4—6™ altum. 
Folia falcato-secunda, 3-5 ™™ longa, 1™™" lata, lanceolata, acuta, 
superne Carinata, haud vel vix undulata, in tertia parte superiore. 
acute dentata, dentibus in foliis superioribus longioribus et magis 
numerosis, costa basi 120m, medio circa 100m lata, in dimidio 
superiore dorso duabus alis altis dentatis ornata, cellulis inferio- 
ribus rectangulis, hyalinis, haud porosis, mediis 40-50» longis, 
12-15 latis, valde porosis, superioribus brevioribus latioribus- 
que, 30-36p longis, 18m latis, valde chlorophyllosis, alaribus 
