25. P. tenerum. Bruch. Inconspicuous; l. broad ovate-lanceolate, slightly denticulate at apex, very flaccid; caps. small, pale yellow, calyptra conical. Bry. Europ. vol. I.
On the mud of dried-up pools. Winter.
Weald of Sussex, Mr. Mitten.
26. P. sessile. B. & S. Very minute, almost stemless; l. lanceolate-subulate, denticulate more than two-thirds from summit, rigid, with an almost excurrent nerve; caps. sessile small, rounded, brownish: monoicous.
Clay and chalky heaths, rare. Autumn, Winter.
var. β. stenophyllum. l. shorter, linear-lanceolate, slightly serrulate.
27. P. recurvifolium. Dicks. Minute, st. almost none; l. lingulate, rarely linear-lanceolate, erect, frequently recurved, denticulate at the apex, with a strong generally excurrent nerve; caps. roundish-ovate, nearly sessile.
Heaths and fallows. Autumn, Winter.
b. Mature plants without confervoid shoots.
28. P. muticum. Schreb. Minute, almost stemless; l. convolute, broadly ovate, tapering pointed, concave, toothed above, nerved nearly to the apex; caps. round, reddish, erect, sub-sessile.
Moist banks and fallows. Autumn, Spring.
var. β. minus, leaves entire.
29. P. triquetrum. Spruce. Almost stemless; l. in three rows, lowest minute ovate nerveless, three uppermost (perichætial) cucullate, pointed, obovate, keeled, margins
