"H. pratense differs from above in its irregularly pinnate stems, more compressed foliage, l. lanceolate with a narrow point denticulate at apex, and the enlarged basal cells of same colour; not found in Britain."
521. H. arcuatum. Lindb. (H. pratense, var. β. Bry.
Brit.] "L. more falcato-secund, scarcely complanate."
Clay soils, common.
Sect. VII. Prostrate or ascending, rooting, regularly pinnate; l. hamate, circinnato-secund; caps. cernuous, solid, lid convexo-conical.
522. H. molluscum. Dill. St. soft, 1-2in. sub-erect; l.
circinnate secund; st. l. cordate; br. l. ovate-lanceolate—all
tapering acuminate, striate, serrulate, and faintly two-nerved,
crisped when dry; caps. ovate, horizontal; lid conical, large,
sharply pointed.
Moist banks and limestone rocks, common. XI.
Sect. VIII. St. erect, rigid, villose, regularly pinnate; l. hamate; caps. oblong, incurved, solid.
523. H. Crista-castrensis. L. St. sub-erect, 3-4in.
pectinate; st. l. ovate-acuminate, br. l. narrowly lanceolate-acuminate,
strongly striate, serrulate near apex—all circinnato-secund,
faintly two-nerved, margin reflexed; caps.
oblong curved, cernuous, lid conical, pointed; dioicous.
Woods and alpine rocks. VII. VIII.
Sect. IX. St. soft cæspitose, prostrate, branched; l. falcato-secund, rarely spreading, faintly nerved; areolæ linear; per. l. long, deeply sulcate; caps. incurved cernuous, lid convexo-conical or mammillate.
