— 398 — 
2.P.alternifolium Dickson. — Phascum Dicks.; Pleuridium 
Rabenhorst. à 
Upper leaves somewhat abruptly subulate gen. serrulate above; 
costa sometimes excurrent. Capsule subovoid with straight point. 
Tufts green. — Eur. not r. in northern distr. Sweden! France: 
Lamy. Finl.: Bomansson. Amer. U. S: Howe; Sullivant, com. 
C. Mueller. E 
3.P.Bolenderi C. Mueller. | 
Upper leaves gradually subulate nearly entire, shorter than _ 
in the last; costa excurrent. Capsule ovoid with oblique point. 
Tufts dark green. — Amer. r. U. S. Chicago: Roell. 
B. Paroecious or synoecious. 
a. Upper leaves not larger than the lower. 
4.P.axillare Dickson. — Phascum Dicks.; Pleuridium Lindb.; 
P. nitidum Rabenhorst. 
Leaves narrowly ovate-lanceolate acute; costa faint not ex- 
current. Capsule ovoid often lateral. — Eur. not r. Sweden! 
Engl.: Rogers. Austria: Schmidt. 
b. Upper leaves larger than the lower. : 
5.P.palustre Br. eur. — Phascum Br. eur.; Pleuridium Husnot. j 
Leaves crowded: upper ovate-oblong; costa long.excurrent. | — 
Calyptra mitriform. Capsule round-ovoid; pedicel very short. 
Protonema often persistent. — Wet earth. Eur. not common. 
Sweden: S. Berggren; J. Persson. Belgium: Gravet. Amer. »U. S.»: 
Lesq. et Jam. E 
6.P.subulatum Hudson. — Phascum Huds.; Pleuridium Ra- + 
benhorst, r3; balia 3 
Leaves gen. distant; the upper from ovate-oblong base nearly - 
gradually subulate; costa not well-defined above and scarcely 
excurrent. Calyptra cucullate. Capsule ovoid apiculate; pedicel — 
us. very short. Protonema not persistent. — Sandy soil. Eur. | 
princ. in southern distr., r. in northern. Switzerl. Sweden: M. © 
Huss. Engl.: Whitehead. France: Husnot. Amer. »U. &.»:Lq.etJ. —— 
* P.anomalum Kindb. in nuovo giorn. bot. ital. 1893 (as var.) — 
Capsule with distinct lid; pedicel arcuate emergent above — 
leaves. — On sand at a stonewall, mixed with P. subulatum — 
and Ditrichum pallidum (hybride form ?. Eur. Switzerl. near — 
Lugano! i. 
* P.astomoides Limpricht. b 
»Hybride form ? Capsule without distinct lid, shorter than. 
the straight not emergent pedicel. — Mixed with P. subulatum : 
and Ditrichum pallidum. Eur. Austria: Breidler»: Limpricht. 
