HYPNUM ALBULUM, C. Müll
Tab. 112.
Plantæ tenellæ, dclicatulæ, laxissime cæspitulosæ, e dilute viridi albcscentes.
Caulis prostratus, arcte radicans, pallidus, vage ramosus; ramis inordinate pauci-ramulosis.
Folia laxa, complanata, lateralia patentissima, tenuia, pallida, flaccida, ovato-lanceolata, longius anguste acuminata, baud raro deorsum subfalcata, superne obsolete serrulata, breviter gemellocostata, exilissime lineari-areolata; cellulis angularibus paucis subquadratis: perichastialia interiora erecta, oblonga, subito longe acuminata, ad acuminis basin grossius dentata.
Flores monoici, cladogeni; antberidiis vix paraphysatis.
Capsula minuta, ovalis oblonge ovalisve, aequalis inclinata, vel inæqualis leniter incurva, exannulata; pedicello 5–6-lineari debili; peristomii dentibus luteis lanceolato-linearibus firmis densius articulatis, ciliis dentiurn longitudine angustis in carina inter articulationes rimulosis, ciliolis brevibus nodosis binatis; operculo conico brevissime acuminato.
Hypnum albulum, C. Müll. Synop. Musc. 2, p. 280; Sulliv. Mosses U. States, p. 71; Sulliv. & Lesqx. Muse. Bor.-Amer. Exsicc. (ed. 1), No. 302, 302b.
Hypnum tenerum, Hook. & Wils. in Drumm. Musc. Amer. Coll. 2, No. 108, 109.
Hypnum subsimplex, Hook. & Wils. in Lond. Jour. Bot. p. 162 (1844); Sulliv. Musc. Alleghan. No. 52.
Hab. On the ground and much decayed wood, in moist places.
Distinguished from small forms of Hypnum recurvans by its lax mode of growth, more delicate habit, shorter-rostrate opercu-
