Vol. VI., No. 57.] BULLETIN OF THE TORREY BoTANICAL Crus. [New York, Sept., 1879. 
BRYOLOGICAL NOTES, by C. F. Austin. 
§ 348. Orthotrichum Lescurii, Aust.—Musc. Appalach. n. 163- 
—O. cupulatum, var. minus, Sulliv. Icones, Suppl. p 61 t. 44. 
Autoicum, pulvinatum, pusillum, fastigiato-ramosum, saturate 
viride. Folia madefacta aperta, anguste lanceolata, acuta, indistincte 
minutissime papillosa, margine revoluta, costa sub apice evanida, 
cellulis superioribus distinctis majusculis quadrato-rotundis, basilari- 
bus paulo longioribus et pellucidioribus vix latioribus subseriatis. 
Capsula immersa vel subemersa, late ovali, distinctissime 8-costata, 
(costis brunneis,) demum sub ore concolori valde constricta, collo 
brevissimo basi obtuso in humido haud vel vix sulcato, Peristomium 
singulum, dentibus 16 longis lanceolato-sublatis albescentibus ele- 
gantissime crebre punctulatis sat uniformibus et uniformi-articulatis 
vix nodulosis erectis vel demum subreflexis eque distantibus linea 
mediali notatis versus apicem hic illic pertusis. _Operculum depresso- 
convexum, breviter apiculatum. Calyptra lata, brevis, parce pilosa 
16-striata. Flos masc. gemmiformis. : 
On dry shaded granitic or trap rocks, Palisades, &c., New Jersey ; 
also Pennsylvania, Porter, Connecticut, #. M,. Pease, Salem, Mass., 
Robinson, Canada West, Macoun. ‘ 
In size and appearance much like O. strangulatum ; but the 
habitat (on rocks) is different, the capsule is broader, peristome and 
leaves very different, &c. Notwithstanding such high authorities as 
Sullivant and Lindberg have persisted in confounding this species 
with O. cupulatum, 1 am compelled to consider it one of the most — 
distinct, most constant in its characters and most readily determined 
species of the genus. All the forms of O. cupulatum have the leaves 
much broader, less revolute on the margin, with the upper cells 
smaller and more obscure and granulose, the basal cells much larger, 
not arranged in rows, and much more hyaline; capsule less dis- 
tinctly and 8—16-ribbed, (the ribs not colored,) usually more 
urceolate and more exserted, paler, with a much longer, acute, sulcate 
collum, which tapers far down into the (sulcate) pedicel; peristomal 
teeth usually of the same pale yellow color as the capsule, shorter 
and broader, distinctly nodulose, geniculate and uneven, much more 
closely and irregularly articulated below, more distantly so above, 
and marked with vermicular striz (never punctulate) and with a more 
or less zigzag scarcely perforated medial line. The mouth of the 
capsule is composed of about r2 rows of solid vertically much com- 
pressed cells, and furnished with a dark colored rim. In O. Lescuriz 
this part of the capsule is not at all (or but slightly) colored, and is — 
composed of about 8 rows of much less solid cells. Very rarely there | 
are present one or two extremely long and delicate filiform ciliz ! 
Orthotrichum Porteri, Aust. Musc. Appalach. n. 161; O. Peckit, 
l.c n. 162.—O. cupulatum, var. PB Peckii et var. y Porteri, Sultiv. 
Icones Suppl. p. 61.—O. Porteri et O. calcareum, AUST. in: litt. ad = 
SULLIV., 1869. y 
O. anomalo proximum ; differt tamen caule breviore, capsula im- 
mersa vel subemersa multo breviore plerumque 8-striata, foliis magis 
j 
