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Rh GRIMMIA CALYPTRATA, Hook.

Tab. 44.

graciliores, in pulvinulos densos e glauco-viridi incanos congestæ.

subuncialis, e basi procumbente ascendens, pluries ramosus, ramis longiusculis fastigiatis.

dense conferta; inferiora erecto-patentia, elongato-lanceolata, plus minus breviter pilifera; comalia et perichætialia majora capsulam parum superantia, lineali-lanceolata, pilo hyalino scabro fere laminam aequante instructa, canaliculata, marcinibus erectis vel recurvulis; costa continua; reti superiore denso punctiformi, inferiore laxo oblongo.

monoici terminales; antheridiis oblongis curvulis breviter stipitatis eparaphysatis.

emergens, in pedicello recto longitudinem suam paululum superante erecta, oblongo-ovalis, macrostoma, exannulata, sicca lævis; peristomii dentibus lanceolatis fere ad basin usque valde cribrosis; operculo conico rostrato; calyptra (icon mala) campanulato-mitræformi irregulariter rugoso-plicata 5–6-lobata uno alterove latere profunde incisa capsulae ⅔ obtegente.

Rocky Mountains, Drummond. Santa Fe, New Mexico, Fendler.

In size and aspect this species approaches very closely G. leucophcæa, Grev. Its leaves, however, are narrower, not so concave, and less spreading; the mouth of the capsule is wider, and the calyptra larger. But the absence of the annulus and