var. β. _Wilsoni._ St. very tall, sometimes 1ft., yellow green, with slender, nearly simple branches; l. larger, with a filiform acumen, auricles very small.

501. H. VERNICOSUM. Lindb. 1861. (_H. pellucidum_, Wils. MS.; _H. aduncum_, var. _tenue_, Bry. Brit.) St. erect, rather rigid, pinnate; l. shorter falcato-secund, the apical ones involute, ovate, oblong-lanceolate, distinctly sulcate, neither auricled nor decurrent, very glossy, yellow green, nerve vanishing far below apex; cells very narrow, vermicular, purplish at base; caps. oblong cernuous, arcuate.

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502. H. INTERMEDIUM. Lindb. (_H. Cossoni_, Schpr.) In habit like _H. Sendtneri_, var. β. St. elongate, flexuoso-erect, interruptedly pinnate; branches very unequal; l. falcato-secund, ovate-oblong, becoming lanceolate, not furrowed, with minute decurrent auricles, nerve vanishing far below apex; cells very narrow vermicular opaque; outer per. l. squarrose; fr. as in _Sendtneri_.

A Synopsis of the British Mosses — Part 91

503. H. LYCOPODIOIDES. Neck. St. about 2in. erect, sub-pinnate, rather rigid; l. falcato-secund, ovate-acuminute, tapering to an acute point, but not apiculate, concave, entire, nerved nearly to apex, not striate; caps. oblong cernuous, lid conical.

A Synopsis of the British Mosses — Part 91

var. β. _falcatum._ l. more crowded, more falcate, nerve stronger. Near Copgrove, Yorkshire.

504. H. FLUITANS. Dill. St. 6–12in. erect or floating, pinnate, slender; branches short deflexed; l. falcato-secund, lanceolate, tapering from an ovate base, acuminate, slightly serrulate near apex, thinly nerved more than half way, areolæ enlarged at base; caps. small oblong curved sub-cernuous, on a very long seta; lid conical, acute.

505. H. REVOLVENS. Swartz. St. 2–4in. erect or procumbent, sub-pinnate; l. crowded circinnate falcate, ovate-lanceolate, acuminate, concave, serrulate near apex, deep red or purplish; nerve stronger, more than half way; areolæ not enlarged at base; caps. oblong cernuous, on a shorter seta; lid conical acute.

506. H. UNCINATUM. Hall. St. about 2in. slender, erect or procumbent, sub-pinnate; l. circinnate secund, very narrow, lanceolate, setaceous from a broader base, plicate, serrulate, nerved nearly to apex; caps. cylindrical, curved, cernuous, lid conical.

_Sect. III._ St. regularly pinnate, radiculose, tomentose; l. thickly nerved, opaque; caps. sub-arcuate.