HYPNUM SULLIVANTII, Spruce.
Tab. 105.
Plantæ minores, nunc ascendentes, densius cæspitantes, fastigiato-ramosæ, nunc laxc demisso-intricatæ, pallide virides absque nitore, inferne sordide flavescentes.
Caulis subuncialis, tenuis, rigidiusculus, divisus, vage et sub-fastigiatira ramulosus; ramulis rectis 3–7-linearibus.
Folia 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.
Flores dioici: perigonialibus subito longius acuminatis; antheridiis paraphysatis.
Capsula 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.
Hypnum Sullivantii, Spruce in Gray, Man. Bot. 1848; Müll. Synop. Muse. 2, p. 430; Sulliv. Mosses U. States, p. 69; Sulliv. & Lesqx. Musc. Bor.-Amer. Exsicc. (ed. 1), No. 291.
Hypnum prælongum, var., Sulliv. Musc. Alleghan. No. 44.
Hab. 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
