HYPNOIDEAE. HYPNUM. 257 
elongatis decumbentibus Jatissimis planissime compressis, 
-ramulis obtusis, e viridi lutescentibus subsimplicibus plus 
minus elongatis patentibus similibus inaequalibus irregu- 
lariter dendroideo-pinnatis; folia dense imbricata disti- 
chaceo-appressa, distincte undulato - crispa et inferne 
longitudinaliter laeviter plicata, scariosa, e basi quam 
maxime late ovata margine maxime revolutä late acumi- 
nata, acumine ligulato obtusato, supra basin usque ad 
apicem. denticulato-truncatulum dentata, margine erecto, 
nervis latis longiusculis, cellulis angustissimis subincras- 
salis viridibus, alaribus vir ullis; perich. reflexa albida 
late vaginantia inferne laxissime reticulata; theca in ped. 
crasso rigido ascendente purpurascente turgide et cernuo- 
cylindracea breviuscula, operc. conico obtuso mammillato. 
Hypnum Stereodon robustus Brid. H. p. 635. — H. robu- 
stum Hook. Musc, Exot., t, 108. et Schw. Suppl. HL ll. 1. tab. 261; 
species haec Menziesiana quoad icones foliis subsecundis differt. An 
alia species? 
Patria. Yn plaga occidentali Americae septentriona- 
lis: A. Menzies 1793; in terra tract. mont. Rocky Moun- 
tains, „on the large hill to the westward of the Height 
of Land: Drummond. 
73. M. undulatum L. (Sp. Pl. p. 1589.); dioicum; 
late cespitosum prostratum, ramis elongatis /ycopodioideis 
latis robustis flaccidis compressis attenuatis sulphureo- 
viridibus subsimplicibus, humore turgescentibus vagans; 
folia caulina polysticha, sed distichaceo - appressa, humore 
patula, latissime ovata, acumine obtuso vel tenui flexuoso 
brevi terminata, margine erecto, apice subdenticulato, 
superne plus minus transversaliter undulata, nervis in- 
aequalibus longiusculis, cellulis elongatis angustiusculis, 
basi laxioribus, subpellucidis; perichaetia angusta; foliis 
vaginantibus longius acuminatis multo laxius t tenerius 
reticulatis, basi flavidis; theca in ped. longissimo ascen- 
dente tortili purpureo elongate turgide cylindracea cer- 
nua, siccitate ore majori constricta et striata, rufa, operc. 
cupulato, longe subulato obliquiusculo, annulo lato; perist. 
maximum, ext. subflavidum, intern. in pans alta al- 
€. Müller; Synops. musc, frond. 
