Vol. VI, No. 14.] BouLeTin oF THE TorREY BoranicaL Cuus. [New York, Feb., 1876. 
§ 75. C. F. Austin on two New Musci. 
Trichostomum (Trichodon) nodulosum.—Caule cxspitoso semi- 
unciali et longiore erecto (sterili graciliore subflexuoso), foliis 
inferioribus subulato-lanceolatis canaliculatis subuniformi-areo- 
Jatis, cellulis ovali- vel oblongo-quadratis in sectione transversali _ 
rotundis subseriatis, comalibus sensim majoribus e basi oblonga 
lineali-lanceolatis, perichztialibus intimis basi spathulato-oblonga ad 
Z et ultra vaginantibus, reti versus basin sensim duplo triplove 
longiore paulum latiore oblongo et oblongo-lineari stricto subsemi- 
pellucido, omnibus in statu siccato erectinsculis subtortuosis (in 
humido apertis strictioribus) levissimis versus apicem subserratis 
margine (basi excepta) lamellato-incrassatis leniter recurvis, costa 
validiuscula percurrente instructis, capsula in pedicello fere unciam 
longo cylindracea oblongo-cylindraceave erecta in medio leniter 
curvula, calyptra ad sinistram subtorta infra medium capsule 
descendente, operculo alte conico conicove-rostrato leniter curvulo 
(sed non obliquo), annulo composito deciduo, peristomii dentibus 
16 longis lenissime contortis levissimis (haud granulosis) rufo-pur- 
pureis nitidis basi per paribus confluentibus (gemellis) fere ad basin 
in cruribus duobus squalibus tenuissimis filiformibus acutissimis 
tota longitudine distinctissime (circa 10-15) nodoso-articulatis fissis 
{raro aut hic illic minus profunde fissis aut subconfluentibus): pl. 
masc. (semper ?) minima gracilis ad latus feminex parasitica, flore 
minuto terminali. Zrichodon oblongus, n. sp. Aust. in litt. ad Sulliv, 
Dec. 1868. TZrichodon oblongus, Linps. Trichost. Europ. 1864 p. 
15 (adnot.), ab planta nostra differt: ‘‘ foliis serrulatis, seta quadri- 
lineari, subtlexuosa, dentibus peristomii brevibus, cruribus irregula- 
riter connatis subgranulosis, annulo simplicii— Ceratodon Corsicus, 
Scare. Synop. p. 140, qui ad illam proxime accedere videtur, “ cap- 
sula sicca vacua sulcata, peristomii dentibus, valde granulosis sub- 
-marginatis,” sese distinguit. 
On the perpendicular or inclined snrface of damp or wet rocks 
in deep shaded ravines, Pascack, New Jersey (1868), and Suffern, 
New York (1869). Also at the mouth of “ Buttermilk Ravine” in 
the Catskill Mountains (Rau & Austin, 1875). (Matures in Oct. 
and Nov.) [Only four fertile stems were found at Pascack, and the 
little tuft found at Suffern was sterile. ] ; 
Trichostomum nodulosum differs from its congeners in its per- 
fectly smooth and shining peristomal teeth, usually divided nearly 
or quite to the base into two more slender and more finely and 
acutely attenuated segments, which are strongly nodulose through- 
out their whole length. The following are the only American 
species with which it would seem possible to confound it, with a 
brief view of some of the chief characters by which they severally 
may be distinguished : 
T. tortile, Schrad. (which I have never found on rocks) is of a 
smaller size with a usually much smaller capsule on a shorter pedicel ; 
peristomal teeth paler, much more twisted, stouter, papillose and 
obtusish ; anculus simple and persistent; perichetial leaves with a 
lanceolate much more pellucid base, the innermost ones much dimin- 
