Ant. vulgaris, or J. platyphylla of authors, is the only instance.
III. Frullania. Calyx nearly triangular, divided at the summit into three roundish apiculate segments ; plano-convex above, with sometimes prominent stripes, and more or less besprinkled with minute tubercles. Calyptra of one piece, the limb variously divided. Cap sule ovate, or between ovate and roundish, quadrivalve. Spikelet oval, formed by imbricated convex scales con taining the antherx.
Two species are instanced, F. major (J. dilatata) and F. minor (J. Tamarisci.) IV. Candollea. Calyx more or less cornpressed, trun cated, adhering to the stem by its base. Calyptra of one piece, its border variously divided. Capsule ovate or roundish, dividing into four equal valves.
Antherx subcarnose, irregular in their position, being sometimes on thz. margin of the leaves; at other times on the summit of the terminal leaves ; and usually on a distinct individual.
C. asplenioides, (J. asplenioides,) C. carinata, supposed to be J. compacta of Roth, or J. resupinata of Hooker, C. nemorosa, (J. nemorosa,) and C. complanata, (J. planata,) are lour species given as instances of this genus.
V. Jungermannia. Cal) x monophyllous,membranous, tubular, adhering to the stem by its base. Calyptra of one piece, membranous, pellucid, bearing the style, its border variously divided. Capsule ovate or roundish, covered by the calyptra while it remains in the calyx, dividing into four equal valves. Seeds numerous, minute, adhering to the whole inner surface of the valves by means of very slender elastic filaments.
Antherm without any covering, placed sometimes on the margins or summits of the !caves, at other times forming a roundish mass on the end of the stem, and usually occurring on a distinct individual.
This new genus is arrano•ed into four primary divi • — _ sions, each of which is again divided into sections, and soinetimes into subsections : the first division, entitled, (A.) Leaves without lobes or stipules, consists of the fol lowing sections : first, Leaves entire. Contains J. poan
tlaos, J. scalaris, J. lanceolata, and J. tenerrima, which last is said to be the J. giacillima of English botany : the se cond section, entiled, Leaves emarginate, two-lobed, or bifid, is subdivided, accortiing as (a.) the margin is quite entire, e. without teeth, as in J. connivens. and five other species, not well ascertained ; or as it is 0) too lied, of which the only instance is J. dentata of Signior Raddi, a species of which lie thinks J. Turneri to be probably a variety the third section contains species with more than two teeth, or divisions, of which J. quinquedentata (J. bar bata, Hooker, t. lxx.) is the oniy instance.
The second primary division (B.) contains the species having the leaves lobed, but no stipules.
Its first section contains the species with the srnaller lobe uppermost, as J. falcata of Raddi, (J. albicans) his only instance. Its second, the species with the smaller lobe undermost, of which J. inconspicua of Raddi, sup posed to be J. minutissima, is the only instance.
The third primary division (C.) contains the species having the leaves two-lobed, and furnished with stipules. As only one species is instanced under this division, it was unnecessary to give any title of a section ; yet we find section first, Leaves entire, containing J. serpyllifolia.
The fourth and last primary division (D.) contains the stipulate species, of which the leaves are not two-lobed.
Its first section, in which the leaves are entire, con tains only J. viticulosa. Its second, in which the leaves are emarginate, or bidentate, contains only J. bidentata. Its third, in which the leaves are terminated by more than two teeth or divisions, contains J. trilobata and J. reptans.
VI. Fossombronia. Calyx monophyllous, subcampa nulate. Calyptra of one piece, bearing the style, its border variously divided. Capsule roundish, splitting into irregular segments.
Antherx succulent, pedunculate, situated at the lower part of the stem in a distinct individual.