MUSCI 



415 



4. P. Iiirtellum, Hedw. [Roughish-haired] : Stems creeping, 

 throwing up densely-crowded cylindrical branches; leaves closely 

 imbricated, deltoid, pointed, minutely fringed on the margins, 

 nerveless ; capsule oblong, slightly ventricose at base ; teeth of the 

 peristome long and white ; pedicel about an inch long. "Woods, 

 investing the bases of young trees (particularly of Hickory Horn- 

 beam) with dense glaucous-green mats." 



556. L-EPT'ODOIV, Weber. 



[Gr. Leptos, slender, and odous, tooth ; in reference to the peristome.] 

 Calyptra large, cuculliform, hairy. Capsule oblong. Peristome 

 double; the outer of 16 linear-lanceolate teeth; the inner as in 

 Pterogonium. Lid conic, somewhat beaked. 



1. Li. tricllOIllitrlOIl, Mohr. [Hairy-cap] : Main stem creep- 

 ing, leafless, throwing out pinnate branches ; leaves when moist 

 erect-spreading, oblong-ovate, pointed, nerveless, the margins re- 

 flexed ; perichaetial leaves large, scarious, convolute, as long as the 

 pedicel ; capsule ovoid-cylindrical. On trees. 



557. USUCTODOIV, Schwaegr. 



[Gr. Leufcos, white, and odous, a tooth ; in reference to the peristome.] 

 Calyptra cuculliform, large, rather ventricose, plicate at base. 

 Capsule roundish-oval or oblong-ovoid. Peristome double ; the outer 

 of 16 linear-oblong perforated teeth ; the inner as in Pterogonium. 

 Lid small, depressed-conic, rather short-beaked. 



1. I* jiilsiceus, Hedw. [Ament-like~\ : Main stem creeping, 

 leafless ; branches crowded, erect, simple, cylindrical ; leaves densely 

 imbricated, ovate, nerveless, spreading horizontally when moist; 

 perichaetial leaves large, scarious, convolute, f the length of the 

 pedicel. Woods, on trees. 



3. 1L. bracliypus, Brid. [Short-pedicel] : Allied to the pre- 

 ceding, but the branches longer, more slender and recurved ; leaves 

 elongated, when moist erect-spreading, secund; capsule oblong- 

 ovoid, on a very short lateral pedicel. On trees and rocks. 



' TRIBE 17. NECKERA^CEAE. 

 558. JVECKE'RA, Hedw. 



[Dedicated to N. J. Necker, a German Botanist.] 



Calyptra halved-mi triform. Peristome double; the outer of 16 linear 

 teeth ; the inner 16 cilia arising from a very narrow membrane. 

 Lid conic, more or less beaked. Monoicous. Sterile fl. axillary. 



1. JV. pennata, Hedw. [Feathered] : Stems decumbent ; branches 

 nearly pinnate, flat; leaves bifarious, lance-ovate, slightly wavy, 

 membranaceous ; capsule ovoid, erect, short-pedicelled, immersed 

 in the large perichaetial leaves. On trees. 



TRIBE 18. LESKEA V CEAE. 



559. ISOTHE V CIU!, Brid. 

 [Or. Jsos, equal, and Thekion a little case; from the symmetrical capsule.} 



Calyptra cuculliform. Capsule erect, annulate. Peristome double ; 



