MUSCI. (MOSSES.) (37) 637 
37. GRIMMIA, Ebrh. (Tab. IL) 
Calyptra as in Schistidium, ob larger and extending below the mouth of the 
capsule. Operculum conic-obtuse, or conic-rostrate, deciduous without the colu- 
mella. Capsule ovate, oval, or hay cylindrical, with an erect and curved or 
flexuous pedicel. Peristome single: teeth 16, lanceolate, cribrose, and 2-3-fid 
ove. Inflorescence moncecious or dicecious. — Habit and mode of growth 
strongly resembling Schistidium and Racomitrium. Habitat, on rocks. — 
(Named after Grimm, a German botanist.) 
1. G. leucophi®a, Grev. Diccious; stems 6-10” high, compactly 
ceespitose ; 6 widely spreading, ovate or ovate-oblong, concave, plane on 
the margins, suddenly tapering into a very long pellucid dentate hair-point ; 
capsule oval or oblong, erect, exserted ; teeth of the peristome deeply 2-3-cleft ; 
annulus large, unrolling; operculum “- or long agp re calyptra 
mitriform, 5-lobed at the base. — Sandstone rocks, 8. Ohio. (Tab. IL.) ve 
Olmeyi, Sulliv. Dicecious; tufts loose, stems 5/’-10" high, y 
ney. — Approaches ial to G. trichophylla, Grev.; but that is a rather m 
slender plant; its leaves longer and more flexuous, with a smooth hari 
capsule regularly and strongly ribbed when dry, pendulous on a longer and m 
curved pedicel ; teeth of the — istome bifid; rostrum of the operculum ‘alii 
rc. 
3. G Pe aa aeaiee: Schweegr. Dicecious ; loosely csespitose ; ste 
1/ or more long; leaves much as in No, 2, but dark green, and Bono nine 
costa; capsule immersed, erect on a short pedicel, oval-oblong, smooth when 
dry ; operculum pecans ecicatcr mitriform, lobed. — On rocks, Alle- 
ghany Mountains; common: fruit rare Siren than any of the preceding. 
nniana, Smi Moneecious ; tufts compact, small, hemi- 
spherical, hoary ; stems 3!’- 4! ee leaves Fiaeut toaeolate, with a long and 
rough hair-point, their margins plane; capsule oval-oblong, shortly exserted on 
an erect ei annulus rather narrow ; Sasha conic-obtuse ; calyptra mi- 
triform, lobed. — (G. obtusa, Schwoegr.) — White Mountains of ene Hampshire, 
Oakes na 
38. COSCINODON, Spreng. (Tab. IV.) 
Capsule large, campanulate, plicate, crenate at the base. Operculum conic, 
acute or shortly rostellate. Capsule obovate or lag eRe erect, 
short-pedicellate, annulate. Peristome single: teeth 16, equi uidistant, lanceolate, 
very much ta 2 reflexed when dry. aa samme ious or wc de ious : 
male flower gemmiform. — Combines the characters of Orthotrichum and Grim- 
mia; the habit and sacar of the foliage being that of the last-named genus. 
