258 BIIYACE^. [Atrichum. 



enlarged in the middle from a narrow base and contracted to 

 the blunt point, entire : calyptra twisted, hirsute at the apex : 

 capsule erect or inclined and slightly curved, obovate, cylindri- 

 cal, naiTowing at base to a short pedicel ; lid obliquely rostrate ; 

 teeth white and hyaline, excepting the medial dark orange line. 

 — Sulliv. Mosses of U. States, 41, and Icon. Muse. 73, t. 46. 

 Catharinea crispa, James, Journ. Acad. Philad. 1S55, 445. 



Hab. Grassy banks of small streams, and boggy ground, near Camden, 

 New Jersey, 



7. A. parallelum, Mitt. Dioecious : plants loosely cespi- 

 tose, dark green ; stems simple, short, solid, erect : leaves half- 

 open, incurved when moist, the upper longer, lingulate-Ianceo- 

 late, sharply dentate (not margined) from below the middle, 

 marked on the back by small thin tooth-like processes ])arallel 

 to the costa, which is also 2-3-lamellate on the back, and the 

 lamellie dentate ; lower leaves shorter, oblong, more obtuse ; 

 perichietial leaves oblong, convolute at base, gradually narrowed 

 and lanceolate : male plants more slender, the flowers cup-shaped : 

 capsule long and subcylindrical, slightly arcuate, contracted 

 under the orifice, ventricose below ; surface verrucose. — Journ. 

 Linn. Soc. viii. 48, t. 8 ; Sulliv. Icon. Muse. Suppl. 54, t, 38. 



Hab. Grand Cote, Rocky Mountains (Drunimond)\ mixed with tlie 

 following. 



With the size and habit of A. undulatum, distinguished by the capsule 

 more ventricose below, and by the characters indicated above. 



94. OLIGOTRICHUM, DC. 



Stems simple, from subterranean stolons. Leaves long, 

 linear-lanceolate, incurved on the borders, not margined, sub- 

 tubulose at the apex, distantly serrulate, incurved-hooked when 

 dry ; costa subterete and naked at base, gradually dilated iip- 

 ward and covered with numerous undulate sinuous and crenu- 

 late lamellae. Flowers dioecious, the male cup-shaj)ed, prolifer- 

 ous ; paraphyses partly filiform, partly spatulate. Calyptra large, 

 scarcely covered with erect hairs. Capsule erect, ovate-oblong, 

 cylindrical, thin. Lid convex-conical, acuminate or long ros- 

 trate. Teeth of the peristome thin, irregular. 



1. O. aligerum, Mitt, Dioecious: plants loosely cespitose 

 or gregarious, black, radiculose toward the base ; stems short 



