38 MUSCI. (MOSSES.) 
(Name from xéoxivor, a sieve, and ddav, a tooth, in allusion to the perforated 
teeth of the peristome.) 
. ©. Wrightii, Sulliv. Monecious ; tufts compact, hoary; stems 3”- 
‘ 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; areole at the base oblong, 
x oval, both pellucid, the central ones roundish and chloro- 
; nic-acute; annulus large, compound. — s, near San 
arcos, Texas, Wright. — C. pulvinatus, its only congener, has a str ar and 
longer pedicel, obovate capsule, lanceolate leaves, and is diwcious. (Tab. 18.) 
39. RACOMITRIUM, Br. & Sch. (Tab. 16.) 
Calyptra conic-mitriform, pemes rostrate, Aik and papillose at the apex, 
membranous and multi t the base. ercalum conic, with a short or long 
subulate rostrum. Ciecdes elliptical, nearly sires cal or ovate-oblong, erect, 
smooth, she otiealine Peristome single: teeth 16, 2- oy the Eee 
or somewhat cohering. Inflorescence dicecious. — Tall, striking species, the 
largest among the Grimmioid Mosses ; stems cuts or irregularly 
branched ; rial oblong-lanceolate, with or without a diaphanous hair-point, 
costate-carinate; areolx above mostly quadrate, below enlarged, linear, with a 
sinuous outline. (Name from pdxos, a shred, and psrpivr, a veil, referring to the 
te base of the calyptra.) 
§1. DRYPTODON, Br. & Sch.— Ramification dichotomous; the innovations 
simple, fastigiate. 
1. R. aciculire, Brid. Loosely ote dull green; stems procum- 
bent and leafless below, ascending, 1-3! long; leaves crowded, spreading every 
way or F secund, orato-obroni, the costs ech below the toothed or entire 
y 2-3-fid; operculum long, subulate-rostrate.—On wet rocks, Allegim a 
uw 
2. BR. Sudéticum, seh & Sch. Patches ‘aber grayish or lurid ; stems 
as in the last; leaves fi +t base, spreading, recurved or incurved, linear- 
lanceolate, with a rather short denticulate pellucid — capsule small, 
oval or elliptic-oblong on a short erect or curved pedicel; operculum shortly 
Tostrate. — Exposed rocks, Alleghany Mountains. (Bu). 
§2. RACOMITRIUM Propver.— Ramification irregular ; branches ramulose ; 
the innovations not fastigiate. 
_ 8. R. fasciculare, Brid. Patches loose, of a light green color ; stems 
1-2! long, wg inition: branches with numerous fasciculate short 
branchlets ; rowded, spreading, linear-lanceolate, tapering, without & 
pellucida tri, a reflexed, the areolx above and below elongated and 
sinuous ; ee cient; rorraee id = ee piped oe its whole 
— Moist rocks, 
length ; teet 
Alleghany 
aan (Tab. 16.) (Ea.) 
