MUSCI. (MOSSES.) 37 
37. GREMMIA, Ehrh. (Tab. 16.) 
Calyptra as in Schistidium, but larger and extending below the mouth of the 
cay perculum conic-obtuse, or conic-rostrate, deciduous without the colu- 
mella. Capsule ovate, oval, or nearly cylindrical, with an erect and curved or 
flexuous pedicel. Peris single: teeth 16, lanceolate, cribrose, and 2-3-fi 
ove. Inflorescence moneecious or dicecious.— Habit and mode of growth 
eth resembling Schistidium and Racomitrium. Habitat, on rocks. — 
(Named after Grimm, a German botanist.) 
1. G. leucophiza, Grev. Dicecious; stems 6/’-10" high, ee 
COMpHOES leaves widely spreading, ovate or ovate-oblong, concave, plane o 
annulus large, unrolling ; — um toh: or long conic-rostellate ; calyptra 
mitriform, 5-lobed at the base. nd ks, S. Ohio. (Tab. 16.) (Eu.) 
meyi, Sulliv. Dicecious; tufts loose, stems 5!’-10! high, yel- 
ere -green, dete dhncsslate: gradually tapering into a long diaphanous ser- 
rated hair-point; capsule oval or ovate-oval, not ribbed when dry, oblique or 
above; annulus compound; operculum with a conic base and an oblique ros- 
trum; calypira cuculliform, 2-3-fid at the base. — Rocks, Rhode Island, S. TZ. 
Olney. — Approaches closely to G. trichophylla, Grev.; but that is a rather more 
slender plant; its leaves longer and more flexuous, with a smooth hair-point; 
ect regularly and strongly ribbed when dry, pendulous on a longer and more 
rved gore teeth of the enue bifid ; rostrum of the operculum straight; 
eae a mitriform ; annulus large 
iaiieatiad Schwregr. niortsttent loosely czespitose ; stem 
1’ or more long; leaves much as in No. 2, but dark green, and with a stouter 
costa; capsule immersed, erect on a pee rt perteses omen = smooth when 
dry ; operculum i vcsitts' calyptra mitriform, d.— On rocks, Alle- 
ghany Mountains; common: fruit rare. stat ee 8 of the preceding. 
onninma, Smith. Monecious; tufts compact, small, hemi 
dahicctent, She stems 3-4" high; leaves Gini with a long and 
rough hair-point, their margins pine capsule oval-oblong, shortly exserted on 
an erect pedicel; annulus rather narrow; operculum conic-obtuse; calyptra mi- 
triform, lobed. —(G. obtusa, Schuvegr.) — White Mountains of New Pini, 
Oakes. (Eu.) 
38. COSCINODON, Spreng. (Tab. 18.) 
Capsule large, campanulate, plicate, crenate at the base. sigs um conic, 
acute or shortly rostellate. Capsule obovate or oval-oblong, immersed, erect, 
short-pedicellate, annulate. Peristome single: teeth 16, Caton lanceolate, 
very much cribrose, reflexed when dry. Inflorescence moncecious or dicecions: 
male flower gemmiform. — Combines the characters of Orthotrichum and Grim- 
mia ; the habit and structure of the foliage being that of the last-named genus, 
54 
