90 CRTPTOGAMIA. 



Hab. Hawaii, District of Puna, Sandwich Islands ; without fruit. 



5. Mniadelphus Vitianus, Sulliv. (Tab. 24.) 



M. dloicum; caulibus ascendentibus frondiformibus subsimplicibus ; foliis 

 complanate imbricatis e basi oblonga orbiculari-spatliulatis toto ambitu 

 pellucide marginatis abmpte cuspidatis fcuspide tortaj mollibus semi- 

 costatis, areolatione laxissima, superne rotundato- in/erne oblongo-hexa- 

 gona ; copsula rninuta ovali longicolla horizontali, operculo subulato- 

 rostrato, calyptra setoso-hirta basi Jimbriata, pedicelh tuberculato. 



Mniadelphus Vitianus, Sulliv. in Proceed. Amer. Acad. Art. Sci. Jan. 1854. 

 Hab. Feejee Islands; on decayed wood. 



A glaucous green plant, with ascending stems 1-2 inches high, and 

 2-2 i lines broad, complanate, fissidentoid in appearance, mostly sim- 

 ple or with one or two branches. Leaves closely imbricate, oblong or 

 sublinear-spathulate, of a flaccid, delicate texture ; margins undulate, 

 surrounded by a conspicuous, translucent border (composed of linear 

 flexuous cellules), which runs out at the apex of the leaf into a 

 twisted cusp ; areolation large, rotund-hexagonal above, oblong-hexa- 

 gonal below ; costa slight, scarcely half the length of the leaf. Cap- 

 sules minute, dark brown, short-oval, with a long collum, horizontal, 

 mouth slightly oblique, exannulate. Teeth of the exterior peristome 

 linear, acuminate, closely articulated, the two series of the outer layer 

 of cellules widely separated ; the inner peristome a plicate membrane, 

 divided above into carinate cilia. Operculum long as the capsule, 

 subulate-rostrate from a conic base. Pedicels numerous, springing 

 from near the apex of the stem, strongly tuberculate, flexuose, 

 enlarged at the base. Vaginula oblong. Perichsetial leaves loose, 

 small, elliptical-ovate, concave. Calyptra mitraiform, hispid, fringed 

 at base with long, simple, flexuous cellules. Dioicous. Male flower 

 axillary, stipitate ; antheridia 12-15; paraphyses rudimentary. 



Compared with Distichophyllum spathulatum, Doz. & Molkb. (Muse. 

 Frond. Ined. p. 103, t. 34 et 35); a very closely related species, Mnia- 

 delphus Vitianus, differs by its much more distinctly bordered leaves, 



