610 (10) Musci. (mosses.) 



65. ANOMODON. Cilia from a narrow base. Foliage yellowisli green. 

 68. THELIA. Cilia obsolete : a broad annular membrane present. Foliage glaucous-green. 

 6. Leaves not papillose, complanate. 



76. NECKEEA. Cilia from a narrow base. Leaves undulate. 



75. CTLINDIlOTHECniM:. CUia from a narrow base. Leaves smootli. 



77. O AT AL T A. Cilia from a broad base : ciliolse present. 



c. Leaves not complanate. 

 = Inner peristome a membrane adherent to tlie teetli. 



62. LEUCODON. Perichseth very long. Calyptra smooth. 



63. LEPTODON. Perichaeth very long. Calyptra hairy. 



72. PYT.ATS7KA. Perichasth short. Calyptra smooth. 



= = Inner peristome free, divided to the base into 16 cilia. 

 71. ANACAMPTODON. Teeth of the peristome reflexed when dry. 

 74. PLATYGYRIUM. Teeth of the peristome broadly margined. Annulus large. 



64. ANTITRICHIA. Perichseth long. Ramification pinnate. Pedicels flexuose. 



79. CLIMACIIIM. Perichseth long. Ramification dendroid. Columella exserted. 



60. DICHELTMA. Perichseth long. Inner peristome as in Fontinalis, No. 59. 



■*- ■<- Capsule inclined, unequal. 



73. HOilALOTHECItJM. Inner peristome a membrane adherent to the teeth. Calyptra hairy. 



80. HXPNTJjM. Inner peristome a plicate membrane divided half-way into carinate cilia : cili- 



olce present. Calyptra smooth. 



B. Calyptra mitriform. Peristome double ; its teeth 16. 

 * Capsule immersed, erect. 

 59. FONTINALIS. Inner peristome of 16 cUia connected by cross-bars. 



61. CRTPHLSIA. Inner peristome of 16 free and subulate cilia. 



# * Capsule exserted, horizontal. 



78. HOOKERIA. Inner peristome of 16 csirinate cUia : cUiolse absent. 



Suborder I. SPHAOWACE^. 



1. SPHACJNUM, Dm. Peat-Moss. (Tab. I.) 



Calyptra irregularly ruptured in the middle. Operculum convex, depressed. 

 Capsule subglobose, sessile on the pedicellate vaginula. Peristome none. In- 

 floi'escence monoecious or dicEcious : antheridia roundish, with a long pedicel, 

 lodged singly in the axils of the peiigonial leaves at the clavate extremities of 

 short branches. — Lai-ge, soft, flaccid, and usually pale-coloi-ed plants, inhabiting 

 bogs and swampy places ; stems erect, mostly simple, capitate at the summit by 

 the crowded branches which elsewhere are (3-7 together) in distinct fascicles ; 

 branch-leaves S-ranked, between broad-ovate and linear-lanceolate, convolute- 

 concave, with a peculiar reticulation, composed of two kinds of cellules, one kind 

 (utricles) large, sub-fusifonn, colorless, perforated, and lined with a spu-al fila- 

 ment (fibriUose), except in No. 10; the other kind (ducts) much smaller, linear, 

 chlorophyllose, ranning between the contiguous walls of the utricles and form- 

 ing the angular-serpentine network. ("Ecjidyvos, the ancient name.) Cross-sec- 

 tions of the leaf (seeSulliv. in Mem. Amer. Acad. IV. p. 174. t. 4. B.), showing 

 the form and relative position of the utiicles and ducts, are of service in deter- 

 mining the species, as follows : — 



* Ducts somewhat elliptical, situated centrally between the angular-rotund utricles, 

 and not extending to either surface of the leaf 



