638 MUSCI. (MOSSES.) 



(Name from jcffcricuw, a sieve, and o&ov, a tooth, in allusion to the perfomted 

 teeth of the peristome.) 



1. C. Wriglltii, Sulliv. Monoecious; tufts compact, hoary ; stems 3''- 

 4" high, clavate ; leaves closely imbricating (the lower smaller, oval, the upper 

 larger, obovate), very concave, serrate above, suddenly produced into a long 

 hyaline denticulate hair-point, costate half-way ; areolae at the base oblong, 

 those near the apex oval, both pellucid, the central ones roundish and chloro- 

 phyllosc ; capsule oblong-oval, truncate at the base, on a very short curved 

 pedicel; operculum conic-acute; annulus large, compound. Rocks, near San 

 Marcos, Texas, Wright. C. pulvinatus. its only congener, has a straight and 

 longer pedicel, obovate capsule, lanceolate leaves, and is dioecious. (Tab. 18.) 



39. RACOMITRIUUI, Br. & Sch. (Tab. 16.) 



Calyptra conic-mitriform, subulately rostrate, solid and papillose at the apex, 

 membranous and multifid at the base. Operculum conic, with a short or long 

 subulate rostrum. Capsule elliptical, nearly cylindrical or ovate-oblong, erect, 

 smooth, long-pedicellate. Peristome single: teeth 16, 2-3-fid, the segments 

 free or somewhat cohering. Inflorescence dioecious. Tall, striking species, the 

 largest among the Grimmioid Mosses ; stems dichotomously or irregularly 

 branched; leaves oblong-lanceolate, with or without a diaphanous hair-point, 

 costate-carinate ; arcolas above mostly quadrate, below enlarged, linear, with a 

 sinuous outline. (Name from /5d/cos, a shred, and piTptuv, a veil, referring to the 

 lacerate base of the calyptra.) 



1. DRYPTODON, Br. & Sch. Ramification dichotomons; the innovations 

 simple, fastigiate. 



1. R. acicillare, Brid. Loosely caespitose, dull green; steins procum- 

 bent and leafless below, ascending, l'-3' long; leaves crowded, spreading every 

 way or secund, ovate-oblong, the costa vanishing below the toothed or entire 

 obtuse point ; capsule elliptic-oblong, its mouth small ; teeth of peristome deep- 

 ly 2 - 3-fid ; operculum long, subulate-rostrate. On wet rocks, Allegheny 

 Mountains. (Eu.) 



2. R. Slldc'ticum, Br. & Sch. Patches loose, grayish or lurid ; stems 

 as in the last ; leaves from an erect base, spreading, recurved or incurved, linear- 

 lanceolate, with a rather short denticulate pellucid hair-point ; capsule small, 

 oval or elliptic-oblong on a short erect or curved pedicel ; operculum shortly 

 rostrate. Exposed rocks, Alleghany Mountains. (Eu.) 



2. RACOMITRIUM PROPER. Ramification irregular ; branches ramnlose ; 

 the innovations not fastiaiate. 



3. R. f asciculfire, Brid. Patches loose, of a light green color ; stems 

 l'-2' long, assurgent, branched; branches with numerous fasciculate short 

 branchlets; leaves crowded, spreading, linear-lanceolate, tapering, without a 

 pellucid hair-point, margins reflcxed, the areolaj above and below elongated and 

 sinuous ; capsule elliptical ; rostrum of the calyptra strongly papillose its whole 

 length ; teeth of the peristome bifid to the base, slender, nodulose. Moist rocks, 

 Alleghany Mountains. (Tab. 16.) (Eu.) 



