bear solitary capsules, are 2-3 inches long; the capsules half an inch long, oblong-turbinate, obscurely glandular, and crowned with the reflexed leaflets of the perianth. In one specimen the labellum was furnished with only four glands in two lines; in another they extended to the middle with four or six in each series.
6. Acianthus rivularis ? A. Cunningham, Prodr. Flor. Nov. Zel. in Hook. Comp. Bot. May. vol. ii. p. 376. Lindl. Gen. et Sp. Orchid, p. 397.
Hab. Lord Auckland's group and Campbell's Island; on mossy banks in the woods, common.
I have seen neither flower nor fruit of this plant, and only a withered capsule of what I believe to be Mr. Cunningham's A. rivularis, gathered in New Zealand by Mr. Colenso. The leaves of the former vary very much in size and shape according to their age; the younger ones are cordate or ovate and cordate at the base, acute; as they grow older they become orbicular, deeply lobed at the petiole, of the same size and texture and similarly nerved as in the genus Acianthus.
Dubii generis.
The following species I am unable to refer to any genus, the flowers being too imperfectly developed for a satisfactory determination.
7. Tuberibus didymis obovatis ad collum fibras validas horizontaliter emittentibus, caule erecto basi vaginato, vagina elongata integra ore abrupta tenuissime scariosa, folio solitario lineari-elongato semiterete superne canaliculato crasso et subcarnoso basi fisso scapum vaginante, scapo 3—5-floro, floribus spathaceo-bracteatis ut in Orthocerate, perianthii foliolis valde immaturis subæqualibus exterioribus late ovatis acutis, interioribus paulo angustioribus, labello late obovato nudo, columna semiterete lobis lateralibus nullis, anthera majuscula terminali.
Hab. Lord Auckland's group; in woods near the sea, not uncommon.
Tubers about 3 lines long, similar to those of Orchis latifolia, but much smaller; from these the leaf springs at once, its petiole surrounded by a tubular cylindrical sheath. The leaf is 6—8 inches long, 1—2 lines wide, acute or blunt at the apex, green, and of a singularly thick and fleshy texture when recent, coriaceous when dry and quite black. The young scape is covered with what appear sheathing cucullate bracts; they arise one from the base of each of the flowers; the latter are very small.
8. Foliis solitariis (rarius binis) lineari-lanceolatis acutis valde concavis coriaceis nervis parallelis basi vaginatis, scapo ut videtur bibracteolato, flore immaturo solitario, perianthii foliolo dorsali late ovato subacuto cucullato lateralibus interioribusque linearibus obtusis, labello ovato disco obscure 6—7-glanduloso, anthera terminali.
Hab. Lord Auckland's group; in woods, rare.
The leaves here are 2—3 inches long, very concave; the petiole inclosed in a long scarious sheath which is split above; the flower is small and inclosed in two sheathing bracts. This plant has some points in common with Chiloglottis, Br., but the leaves are not like those of that genus.
