HYPNOIDEAE:: HYPNUMOGO + 409 
tenellus pusillus fasciculato - ramosus , ramis brevibus te- 
nerrimis erectis, apice subcurvulis ; homomallophyllis;. fo 
lia caulina -laxiuseule imbricata, e basi angustissime. de- 
currente anguste. lanceolata parum falcato > acuminata, 
breviuscula , margine erecto, basi distinctius superne mi- 
nus denticulato, nervo carinato viridi subtenui subexeur- 
rente, cellulis minutis mollibus teneris virescentibus, ala- 
ribus paucissimis minute quadratis; perich. multo majora 
vaginantia, late lanceolata breviter subfalcatim acuminata, 
laxius areolata , obsoletinervia; theca in ped. elongäto te- 
nero laevi parum tortili i» cöllum distinctum inerassato 
aurantiaco erecta subclavato - oblonga tenella pulchella, 
plus minus majuscula, fusca, annulata, leptodermis, opere. 
breviter conico luteo, rostello brevissimo incurvo pallido ; : 
perist. d. ext. teneri lutei dense trabeculati, int. flavidi 
laeves vix pertusi fragiles, ciliis singulis albis brevibus. 
Hypnum serpens v. compactum. Hook. in Drumm, Musc: Amer. 
No. 188. . 
Patria. America septentrionalis, ad terram locis um- 
brosis humidis: Drummond in locis accuratius non de- 
signatis. 
Species notis expositis distinctissima et elegantissima, 
cum nulla alia confundenda. 
341. H. parvulum C. Müll; monoicum ; late decum- 
bens viridissimum pusillum tenellum vage ramulosum; fo- 
lia caulina erecto - conferta; humore patentia subsquarrosa, 
e basi anguste. cordat“ ovato- lanceolata , | planiuscule ca- 
rinata, laevia, amoene breviter pellueide reticulata viri- 
dia, nervo tenui ultra medium evanido , margine infima 
basi ad cellulas alares minute quadratas granulosas chlo- 
rophyllosas parum revoluto, superne pseudo=denticulato ; 
perich. vaginantia, subreflexa, basi laxius reticulata; theca 
in ped. brevi rufulo laevi erectà minute ovalis , annulo 
obscuro persistente, operc. e basi. convexa Óreviter. obli- 
que rostellatos perist. minuti d. ext. lanceolati brevissimi 
irregulares latiusculi, linea media secedente plerumgue 
irregulariter bifidi, densius trabeculati, rufescentes, interni 
