614 MUSCI. (mosses.) 



Suborder III. BRYACE^. 



Div. I. Acrociirpi. 



Fruit terminal on the main stem, or rarely terminal on short lateral branches. 

 A. CLEISTOCAliPI. — Capsule without an operculum, rupturing irregularly. 



Tribe I. PHASCEJE. 



3. ARCH1DIUM, Brid. (Tab. 15.) 



Calyptra irregularly ruptured in the middle ; the lower part persistent. Cap- 

 sule globose, sessile on the short vaginula, immersed. Columella none. Spoi-es 

 large, few (8-15). Inflorescence monoecious : male flower naked or 2-leaved, 

 axillary. — Minute terrestrial plants, of a structure more simple than any of the 

 suborder, hence its name {'Ap^i8i.ov, a beginning). 



1. A. OBlioetftse, Schimp. Stems at first erect, l"-2" high, afterwards 

 decumbent, and lengthened by innovations ; leaves lanceolate, cuspidate by the 

 excurrent costa, slightly denticulate above, the perichaitial much larger ; capsule 

 terminal on a short lateral branch. (A. phascoides, Muse. Alleglmn., No. 213.) 

 — Meadows and waste fields, Central Ohio, and N. Alabama. (Tab. 15.) 



4. PHASCUM, L. (Tab. 15.) 



Calyptra campanulate or cuculliform. Capsule roundish, more or less apicu- 

 late, shortly pedicellate, usually immersed. Columella present. Spores numer- 

 ous, muriculate : inflorescence monoecious. — Diminutive species, mostly annual, 

 growing on the ground, either stemless and bulb-like, or with a short stem, 

 sparingly divided ; leaves costate or ccostate. (4>do-Kov, an ancient name for a 

 moss.) — For convenience, the genus is here retained in its former extended sense ; 

 the names of the genera, into which a natural arrangement requires the species 

 to be distributed, being used for sections. 



# Plants growing from a confervoid thallus. Columella fugacious. 



(j 1. EPHEMERUM, Hampe. — Stemless: leaves of a loose rhomboidal areolation : 

 calyptra campanulate-conic : capsule globose-ovate, subsessile, apiculate : s/>ores 

 large : male flower gemmiform, at or near the base of the fertile stem. 



1. P. serB's'stum, Schreb. Leaves oblong or linear-lanceolate, ccostate, 

 deeply serrate ; capsule purple, shining. — Moist ground; edge of woods. (Eu.) 



2. P. Sessile, Br, & Sch. Leaves lanceolate-subulate, nearly entire ; costa 

 excurrent, more or less obsolete near the base. — Clayey soil, in thin woods, 

 Central Ohio. (Eu.) 



3. P. crassiliervilliii, SchwaegP. Leaves linear-lanceolate, strongly 

 and irregularly dentate near the apex ; costa continuous, not excurrent. — With 

 the last. — Also with a var. 1 having the leaves near the apex spinulose-dentate, 

 (the teeth often recurved,) and papillose or cristate on the back; spores much 

 larger : — probably E. spinulosum, Br. Sf Sch., mentioned iu Wils Bryol. Brit, 

 p. 27. 



