Leaves succubous, 4–5-divided, and with the underleaves setaceously fringed. Diœcious. Fruit terminal, or axillary from the growth of innovations. Involucral leaves coalescent into an oblong truncate hairy tube, blended in our species with the calyptra; perianth none. Capsule oblong, its pedicel bulbous at base. Elaters free. Antheridia large, in the axils of leaves on terminal branches. (Name from θρίξ, hair, and κολεός, a sheath, from the hairy involucre.)
1. T. tomentélla, Dumort. Stems pinnately decompound, densely tufted, glaucous, 2–6´ long; leaves nearly uniform; underleaves subquadrate, as wide as the stem.—Among mosses in swamps; common. (Eu.)
T. Biddlecòmiæ, Aust., very imperfectly described from specimens collected in Urbana, Ohio, is said to be simply and rather distantly pinnate.
8. HERBÉRTA, S. F. Gray. ([Pl. 24.])
Leaves large, incubous or nearly transverse, narrow, 3-ranked, the underleaves being scarcely smaller, cleft to or below the middle, the lobes acute. Diœcious. Fruit terminal on a long branch. Involucral leaves numerous, equitant; perianth ovate-subulate or narrowly fusiform, 3-angled, deeply 6–8-lobed. Calyptra small, obovate, deeply trifid. Capsule large, globose. Elaters free. Spores large, muriculate. Antheridia in the bases of leaves of a short terminal spike. (Named for William Herbert, an English botanist.)
1. H. adúnca, S. F. Gray. Stems long and slender, erect, brownish, nearly simple; leaves and underleaves almost alike, curved and one-sided, the lobes lanceolate. (Sendtnera juniperina, Sulliv.; not Nees.)—On rocks, Greenwood Mts., N. J., Catskill Mts., N. Y., and probably northward. (Eu.)
9. BAZZÀNIA, S. F. Gray. ([Pl. 24.])
Leaves incubous, oblique, decurved, mostly truncate-tridentate; underleaves wider than the stem, mostly 3–4-toothed or crenate. Diœcious. Fruit on a short branch from the axil of an underleaf. Involucral leaves much imbricate, concave, orbicular or ovate, incised at the apex; perianth ovate-subulate or fusiform, somewhat 3-keeled. Calyptra pyriform or cylindric-oblong. Capsule oblong. Antheridial spikes from the axils of underleaves. (Named for M. Bazzani, an Italian Professor of Anatomy.)
1. B. trilobàta, S. F. Gray. ([Pl. 24.]) Creeping, dichotomous, proliferous; leaves ovate, the broad apex acutely 3-toothed; underleaves roundish-quadrangular, spreading, 4–6-toothed above; perianth curved, cylindric, plicate at the narrow apex and 3-toothed. (Mastigobryum trilobatum, Nees. M. tridenticulatum, Lindenb.)—Ravines, wet woods and swamps; common and variable. (Eu.)
2. B. defléxa, Underw. Stems forked or alternately branched; leaves strongly deflexed, cordate-ovate or ovate-oblong, falcate, the upper margin arcuate, the narrow apex 2–3-toothed or entire; underleaves roundish-quadrate, the upper margin bifid, crenate, or entire; perianth cylindric, arcuate, plicate above and denticulate. (Mastigobryum deflexum, Nees.)—On rocks in the higher mountains eastward. (Eu.)