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Rh HYPNUM COMPACTUM, C. Müll.

Tab. 123.

graciliores, condensato-cæspitosa), in cacspitibus latis plus minus profundis supcrne viresccntibus inferne rubiginosis degentes.

tenuis, uncialis et ultra, plerumque erectus, fasciculato-ramosus, toto fere longitudine stupa radiculari obrutus; ramis conferte foliosis.

undique erecto-patentia, rarius subsecunda, angustc ovato-lanceolata, sensim acuminata, basi decurrentia, caviuscula, margine præcipue inferiore leniter serrulata; costa crassa ad summam fere apicem perdurante; reti laxiusculo, cellulis angularibus paucis subquadratis, cseteris angulari-fusiformibus: perichætialia oblonga, subitius tenui-acuminata, apice distincte serrulata, costa debili.

ex cl. Müller monoici.

erecta vel leniter inclinata, æqualis, oblonga vel sub-clavato-oblonga, raro subinæqualis incurvula, leptoderma, alte pedicellata, sicca sub ore magno constricta, collo distincto; peristomii dentibus lanceolato-linearibus dense articulatis pallidc luteolis, ciliis asquilongis in carina rimulosis, ciliolis singulis brevissimis; annulo simplici angusto; operculo conico brevissime tenui-rostellato; caljptra dimidiata brevi vix infra operculum procedente.

On decayed wood, British America, Drummond. Oregon, Lyall.

The compact mode of growth, the suberect clavate-oblong and wide-mouthed capsule, the short and slender rostrum of the