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Rh HYPNUM SULLIVANTII, Spruce.

Tab. 105.

minores, nunc ascendentes, densius cæspitantes, fastigiato-ramosæ, nunc laxc demisso-intricatæ, pallide virides absque nitore, inferne sordide flavescentes.

subuncialis, tenuis, rigidiusculus, divisus, vage et sub-fastigiatira ramulosus; ramulis rectis 3–7-linearibus.

erecta, laxius incumbentia, ovato-lanceolata et lineari-lanceolata, longe tenui-acuminata, basi concava, ibidemque margine recurva, toto ambitu serrulata, dorso hic illic papillis conspersa; costa supra medium evanescente; areolatione minuta e cellulis flexuoso-linealibus obtusis, illis ad angulos insertionemque decurrentem subquadratis: perichætialia e basi oblonga vaginante filiformi-attenuata varieque flexa, subecostata.

dioici: perigonialibus subito longius acuminatis; antheridiis paraphysatis.

ovalis, oblonga, turgide gibboso-ovata, cernua; pedicello 4–7 lineas longo ubique tuberculato; annulo subpersistente; peristomii dentibus lanceolato-subulatis firmis crebre articulatis aurantiacis, cuticula dorsali transversim striolata, ciliis luteolis dentes asquantibus in carina dehiscentibus, ciliolis binis; operculo breviusculo conico plus minus acuminato.

On the ground, margins of woodland brooks, &c.

This species is intermediate between H. prælongum, L., and the Californian H. Whippleanum, Sulliv.; differing from the first in its much shorter operculum, and slenderly acuminate leaves