276 Franc. STEPHANI: 
tantum setulosis, setulis remotiusculis, simplieibus, strictis, recte paten- 
tibus. Costa tenuis, dorso et ventre cellulis corticalibus biseriatis 
tecta, postice setulis sparsis brevibus hirta. Oellulae alarum 27 x 36 u, 
ad costam ipsam zuigoTeE, marginem versus parum minores. Reliqua 
desunt. 
Hab. in Martinique, in silvis du plateau Chou (prös des Deux- 
Choux), m. Sept. 1901: Duss n. 597. 
Jungermannia Dussiana Steph. (n. sp.). Dioica, mediocris, pallide 
bruneola, rigida, dense intricatim caespitosa. Caulis ad 12 mm. longus, 
simplex, validus, fuscus et rigidus, radicellis longis fuscidulo-rubescen- 
tibus arcte repens. Folia caulina parum imbricata, concava, curvatim 
patula, marginibus anguste incurvis, in plano oblique rotundata, 
postice breviter inserta longeque radicellosa, antice oblique decurrentia. 
. Cellulae apicales 27 u, basales 36 x 54 u trigonis magnis hyalinis, ceuti- 
cula aspera. Amphigastria caulina nulla. Folia floralia 2, perianthio 
altissime accreta marginibus solum liberis erecto-patulis. Perianthia 
ambitu elliptica vel clavata, ore angustato crenulato tertio supero pli- 
cato libero et vix exserto, ceterum foliis suis omnino accereto; folia 
basalia subfloralia libera, caulinis simillima majora. Amphigastrium 
florale late ligulatum ereetum, marginibus recurvis canaliculatim foliis 
suis coalitum. Androecia mediana; bracteae .6-jugae foliis minores et 
parvae, confertae basi saccatim ampliatae, integerrimae, marginibus Jake 
recurvis apertae. 
Hab. in Martinique inter Ajoupa et Bouillon solo humido: Duss 
n. 344, in Morne Rouge prope cavernam Notre Dame de Lourdes ad 
terram, Aug. 1901: Duss n. 569. 
_ Plagiochila amplexicaulis Steph. (n. sp.). Dioica, mediocris, 
rigidissima, brunea, in rupibus laxe caespitosa. Caulis ad 4-cm. 
longus, strietus fuscus et tenax, simplex vel pauciramosus, ramis plus 
minus divergentibus. Folia caulina 2,5 mm. longa, imbricata, decurvo- 
homomalla, in plano late ovato-triangularia, brevissima basi in- 
serta, margine antico substrieto nudo, postico e basi valde arcuata (in 
plano caulem late superante) substrieto, 12-dentato, dentibus magnis 
validis, basalibus majoribus longe attenuatis, apice angustissimo 
emarginato-bidentulo. Cellulae apicales 18 4 trigonis magnis, ba- 
sales 27x36 u trigonis maximis. Folia floralia bijuga, caulinis multo 
majora, similia, intima grosse dentata, dentibus numerosis superne mi- 
noribus, basi postica valde irregularibus, saepe maximis hamatisque. 
Perianthia matura semiexserta, late pyriformia, ore parum angus- 
tato truncato, grosse spinoso, spinis validis porreetis remotiuseulis, 
irregularibus; ala lata, perianthio duplo brevior, erispata paueispinosa. 
