288 BKYACEiE. [Leucodon. 



1. L. sciuroides, Schwaegr. Tufts rigid, dark and olive- 

 green : leaves densely crowded, imbricate when dry, open when 

 moistened, ovate-lanceolate, sharply acuminate, 5-plicate length- 

 wise ; perichastial leaves pale, not plicate : calyptra yellowish 

 brown at the apex : capsule elliptical or ovate-oblong, fuscous, 

 exserted on a thick pedicel, twisted to the right w^ien dry; 

 operculum conical, uniform in color; teeth slender, whitish, 

 distantly articulate, entire or split toward the base ; annulus 

 simple, detached by fragments. — Suppl, i. 2. 1, t. 125, figs, a; 

 and y ; Bryol. Eur. t. 468. Ili/pmim sciuroides, Linn. Spec. 

 PL 1130. JVeckera sciuroides, Muell. Syn. ii. 107. 



Hab. On trees, Owen Sound, Ontario, Canada {Mrs. Hoy), 



2. L. jlllaceus, SuUiv. Secondary stems short, numerous, 

 terete : leaves crowded, densely imbricate when dry, spreading 

 horizontally when moist, lanceolate-acuminate from an ovate- 

 elli])tical base, recurved on the borders, slightly serrulate at the 

 apex ; inner }:)erichjBtial leaves exserted, oblong, narrowed into 

 a filiform acumen reaching nearly to the base of the capsule, 

 convolute : calyptra large, plicate at base, clasping the top of 

 the pedicel: capsule oval, turgid, chestnut-color; operculum 

 conical, obliquely sliort-rostrate ; teeth of the peristome broad, 

 linear, whitish, punctulate, bifid at the apex; inner membrane 

 very thin, narrow; annulus none. — Muse. AUegh. n. 87, and 

 Icon. jMusc. 110, t. 69. Pterigynandrum jidaceum, Hedw. 

 Muse. Frond, iv. 51, t. 20. Neclcera pseudalopecura, Muell. 

 1. c. 92. 



Hab. On trees, Northeastern slope of America; very common. 



3. L. brachypus, Brid. Differs from the last in its larger 

 size, the leaves inclined to one side, plicate-striate, the pcrichae- 

 tial loosely appressed, the upper surpassing the more oblong 

 capsule. — Bryol. Univ. ii. 210 ; Sulliv. Icon. Muse. Ill, t. 70. 

 Neckera hracJiypus, Muell. 1. c. 108. 



Hab. Common in moiintainons districts; more rarely fruiting. 



109. PTERIGYNANDRUM, Iledw. 

 Stems ])rostrate or appressed ; branches and branchlets flagel- 

 liform ; basilar stolons numerous, wdth small leaves. Leaves 

 densely crowded, spreading or subsecund, subscarious, papillose 

 on the back, obovate or spatulate, apiculate, costate to the 

 middle ; areolation dense, rhomboidal above, rectangular in 



