4. U. delicatula, Cheesem. n. sp.—Habit of U. novæ-zealandiæ, but much smaller, the scape seldom more than 3 in. high. Leaves 1 or 2 or wanting, narrow-linear or narrow linear-spathulate, quite entire. Scape 1–3 in. high, slender, wiry, erect, 1–3-flowered; bracts very small. Flowers shortly pedicelled, about ⅕ in. long, white with a faint yellow eye. Calyx-segments almost equal, suborbicular, concave. Upper lip of corolla the smaller, linear-oblong, two-lobed at the tip; lower lip with a horizontally spreading lamina which is quite entire, not 3-lobed; palate very obscurely thickened or quite plane; spur longer than in U. novæ-zealandiæ, minutely 2-horned at the tip. Capsule globose, membranous, about 1 in. diam.
North Island: Auckland—Near Kaitaia, T.F.C.; near Waiuku, H. Carse! swamps near Ohaupo (Waikato), T.F.C. November–January.
This differs from U. novæ-zealandiæ in the smaller size, in the upper lip of the corolla being 2-lobed, and in the longer spur, which is minutely 2-horned at the tip. From U. Colensoi it is at once separated by the entire lower lip.
5. U. Colensoi, Hook. f. Fl. Nov. Zel. i. 206.—"Altogether like U. novæ-zealandiæ but with the upper lip of the corolla linear-oblong, 2-lobed; lower broadly cuneate, 3-lobed, middle lobe retuse, disc with 3 gibbous prominences."—Handb. N.Z. Fl. 223. (?) U. vulcanica, Col. in Trans. N.Z. Inst. xxvi. (1894) 318.
North Island: East Coast, Colenso (Handbook).
This does not seem to have been collected since its first discovery more than fifty years ago, unless Colenso's U. vulcanica be the same species. Mr. Colenso describes his plant as having a 3-lobed lower lip, but he also states that the upper lip is "subovate, obtuse," which is at variance with Hooker's description. Unfortunately, the type specimens of both species have been lost, so that no comparison can now be made.
6. U. monanthos, Hook. f. Fl. Tasm. i. 299.—A minute stemless herb. Roots or rhizome very slender, bearing several subglobose compressed bladders 115–110 diam. Leaves few, all radical, ¼–1 in. long, narrow linear-spathulate, petiolate, quite entire. Scape slender, simple, erect, ¾–4 in. high, 1- or rarely 2-flowered. Flowers large for the size of the plant, ⅓ in. diam. or more, dark violet-purple with a yellow eye. Calyx-segments oblong, obtuse. Upper lip of corolla much the smaller, broadly cuneate, retuse; lower lip expanded into a broad semicircular horizontally spreading lamina; palate glandular; spur short, obtuse. Capsule globose, membranous.—Handb. N.Z. Fl. 222.
North Island: Rangipo Plain, near Ruapehu, Petrie! South Island, Stewart Island: Not uncommon in peat-bogs in mountainous localities. Sea-level to 3500 ft. December–March.
Easily recognised by the large dark-purple flowers. For a description of the bladders, and for some notes on the fertilisation, see Mr. G. M. Thomson's paper on the fertilisation of New Zealand flowering-plants (Trans. N.Z. Inst. xiii. 278).
