342 
hygroscopicis brunneo-fuscescentibus, peristomii dentibus crebre 
punctulato-striolatis. 
On shadeless dry limestone rocks; usually with a southerly ex- 
posure, New Jersey; also Pennsylvania, Porter, New York, Peck, 
Georgia, Ravenel. : 
‘This species, in the shape and texture of the leaf, in the general 
form and texture of the (shorter) capsule, and in its peristome (with 
a fragile membrane lining the teeth, &c.,) is almost exactly like O. 
anomalum. It is about the size of O. Lescuri? ; from which, how- 
ever, it is readily separated by its brown foliage; by its darker 
colored narrower (often oblong) capsule acute at the base and some- 
what defluent into the stouter and usually longer pedicel, and com- 
posed of much smaller and more solid cells, the mouth of a different 
structure, the usually 8 (8-16) ribs scarcely more deeply colored, 
narrower and less regular; by its brown peristome composed of 
more solid less uniform nodulose punctate-striolate teeth, which are 
much more closely articulated at the base and less so towards the 
apex, and lined by a fragile membrane; also by the broader and 
shorter, more hygroscopic, more granulose leaves, composed in the 
upper part of smaller and at the base of broader and more pellucid 
cells, Capsule usually not sulcate in the collum (at the base) when 
moist. | 
O. anomolum has the longer, much exserted capsule of a similar 
texture throughout and with a similar collum; but the peristomal 
teeth are vermiculose (not punctate)—striolate, with the strie both 
more distant and more distinct. In both species the fragile inner 
membrane is often broken up, here and there, into quite well formed 
ciliz alternating with the teeth, : 
All the forms of O. cupulatum, including O. parvulum from Colo- 
rado, have the capsule paler, its ribs more evident and straighter 
when moist, the collum more acute and deeply sulcate and tapering 
gradually into the pedicel, peristome different (paler and never (?) 
lined with a membrane), and leaves of a slightly different texture. 
Ten years ago, I pointed out to Sullivant, the strong affinity of 
this species with O. anomalum, and cannot conceive why he should 
have considered it a form of Q. cupulatum, 
Orthotrichum Hainesiz. x. sp.—Autoicum ; plante mediocres, 
_ cxspitoso-pulvinate superne sordide virides inferne fuscee; caule 
_ parce diviso, foliis flexuosis subpatentibus siccitate vix mutatis elon- 
-gato-lanceolatis subcarinatis pro more acutis, papillis longiusculis 
censpersis, margine revolutis, costa subpercurrente, cellulis superiori- 
_bus_mediocribus punctiformibus fere rotundis discretis, basilaribus 
_ haud latioribus subseriatis ovalibus et auguste oblongis hand pelluci- 
dis; capsula levi vel obsolete striata siccitate cylindriacea humidi- 
_tate obovato-cylindrica in pedicello siccitate sulcato sensim defluente 
longiuscule exserta, operculo depresso-conico breviter rostellato, 
_ peristomii dentibus 8 erectis pallido-luteis apice subtruncatis leviter 
_ subquadrifidis levibus obscurissime articulatis subopacis, linea medi- 
_ ali valde indistincte haud ad basin procedente notatis, ciliis 8 paulo 
longioribus subulato-linealibus, linea mediali obscure nctatis, spo- 
