MUSCI. (MOSSES.) (15) 615 
« cohwrens, Hedw. Leaves oblong-lanceolate, strongly serrate; 
costa vanishing below the apex; capsule brownish-purple. — River-banks, Cen- 
tral Ohio. (Eu.) 
* * Plants without a confervoid thallus. Columella persistent. 
§ 2. PHYSCOMITRELLA, Schimp.— Caulescent : leaves loosely pr 
oe" secon gesagt? om ons apiculate: antheridia naked, axilla 
ip (Closely allied to per henna 
ma among Fanariew.) 
5. P. patems, Hedw. Leaves ecu copay oak serrate, costate 
nearly to the apex; capsule sometimes exserted. — Moist clayey soil, Central 
Ohio: rare. (Eu.) 
§3. ACAULON, Mull. — Stemless, bulb-like : leaves broad-ovate or , very 
concave, recurved at the apex, with a lax areolation: capsule. globose, — con- 
cealed by the 2 or 3 large subcucullate perichetial leaves : calyptra minute 
panulate : inflorescence as in § 1. 
6. P. triquétrum, Spruce. Leaves 3- 3-ranked, carinate-concave, shortly 
cuspidate by the continuous excurrent costa, the aera ones 3 and larger; 
capsule horizontal, with a curved pedicel. — On dry so’ 
7. P. miiticum, Schreb. Size of the last; ae not carinate, costate, 
the perichzetial ones 2; capsule erect; pedicel straight. — Moist 
8. P. Schimperianum, Sulliv. (Musc. Bor.-Amer., No. 26.) Re- 
sembles the last two sgrien, bat nee ere leaves near the apex are papil- 
lose on both surfaces, ed margins, and mpaete by 
BSS ER i” NG YP ds their I 
’ without any trace of a costa; capsule, pedicel, and calyptra as ‘in No. 7.— San 
Marcos, Texas, Wright. 
§4. PHASCUM Prorsr. — Stems simple, or once or twice divided by innovations : 
leaves costate ; areolation below large, loose, oblong, above minute, subquadrate, 
chlorophyllose : calyptra cuculliform: capsule globular, acuminate. — (Resembles 
the Pottiex. 
9. P. pidatum, Schreb. Leaves elongated-lanceolate, cuspidate, 
more or “Ao papillose on the back near the apex; costa e port capsule 
immersed or exserted ; antheridia mostl: y naked in the axils of ichetial 
leaves. — Ola fields; not uncommon. (Tab.I.) (Eu.) 
§5. PLEUR{DIUM, Brid.— Stems erect or decumbent : es subulate, costate, 
with a loose and oblong hexagonal reticulation : suadnsshiapeneacapagaale 
conic: capsule globular or ovate; sometimes becoming lateral by innovations of the 
stem. 
10. P. alternifolium, Brid. Lower leaves ovate-lanceolate, the upper 
much longer, subulate from an oblong base; costa excurrent, with the point 
more or less serrulate ; capsule ovate, obtusely acuminate; calyptra iform ; 
male flower gemmiform, -— Old fields, &e.; common. —In American 
forms the base of the leaves is usually more closely areolated than in the Eu- 
