AULACOMNION. 
AULACOMNION, GYMNOCEPHALUS, ARRHENOPTERUM, SCHWÀGR. 
(Linn.) Spec. musc. et suppl. ad Hzow. 
MNIUN DiLten. hist. muscor., Linn. Bnip. Bryol. univ. 
BRYUM, MNIUM, ARRHENOPTERUM Hzpw. Spec. usc. 
BRYUM Hooker et Tavron Muscol. brit. 
ORTHOPYXIS Par. Bravvors Prodrom. 
HYPNUM Weser et Monr Bot. Tasch. 
Habitus peculiaris hie ad Bartramias ilic ad Mnia et Meesias accedens. Plantae 
dichotome ramosae, in caespites confertae, palustres vel saxicolae, perennes. Capsula 
alte pedicellata, cernua, oblonga, regularis vel subincurva, striata, operculo obtuse 
rostellato. 
Caulis primarius erectus, rarius decumbens, tomentosus, axin unicam fertilem 
sistens, plus minus ramulosus. Ramuli saepe flagelliformes, capitulo amorpho terminat. 
Brideliique pseudopodia sistentes. à 
Folia 5 —Ssticha, obovata, elongata, elongato-lanceolata, semiamplexicaulia, con- 
fería, margine integra vel denticulata, costa sub apice evanescente instructa, dense 
hexagono-areolata, saepe papilloso-granulata. 
Florescentia monoica vel dioica: flos masculus terminalis vel axillaris, discoideus 
vel gemmiformis; antheridia oblonga, brevi-pedicellata; paraphyses longiores, clavatae 
vel filiformes. Flos femineus gemmaceus, ennea — vel polypbyllus ; archegonia 19— 29, 
mediocri magnitudine ; paraphyses filiformes seu nullae. 
N Fructus solitarius : vaginula oblonga, glabra; seta elongata, flexuosa; capsula bre- 
vicolla, eernua, ovalis vel oblonga, regularis vel incurva, striata, sieca costata, stomate 
annulo instructa; ealyptra parvula, cucullata, laevis; operculum e basi convexa recte vel 
oblique breviter et obtuse rostratum; peristomium duplex; externum dentes sedecim 
aequedistantes, longitudine tertiam fere capsulae partem aequantes, lanceolato -subulati, ' 
anguste articulati, intus lamellati, hygroscopici, siccitate incurvi; inferius membrana 
tenuissima, hyalina, duodecies carinato-plicata, ad dentium dimidium fere procedens, 
dehinc in processus duodecim carina hiantes ciliaque hisce binatim seu ternatim inter- 
posita divisa. Sporae minutissimae, globosae, laeves. 
Bnvoroni ECROPAEA, i 
