I. OKCHIDEiE. 
2G6 
[ Corysanthes . 
to in FI. N. Z ., I think are rather referable to C. macrantha, which differs in the much 
larger size, very coriaceous, rarely 3-lobed leaf. 
2. C. obionga, Hoo/c. f. — Nematoceras , FI. N. Z. i. 249. t. 57 B. 
Leaf f-li in. long, sessile, membranous, ovate-oblong, apiculate, rarely sub- 
cordate at the base. Flower small, i- £ in. long, on a short scape. Upper 
sepal rather narrow ; lateral and petals filiform, f— 1 in. long. Lip involute 
and truncate, when spread out broadly cordate, deep blood-red ; margin 
pale, toothed. Column short, curved. 
Northern Island, Edgerley ; interior, Cotenso ; Auckland, Captain IJaultain. Middle 
Island: Nelson, Travers; Otago, lleclor and Buchanan. 
3. C. rotundifolla. Hook. f. — Nematoceras , FI. N. Z. i. 251. Leaf 
sessile or petioled, ^-1 in. diam., membranous, orbicular, acute or apiculate, 
cordate or 2-lobed at the base. Flower subsessile, very small, in. diam. 
Upper sepal rather narrow, lateral and petals filiform. Lip involute, trun- 
cate as in C. oblonga. 
Northern Island : Manawata harbour, etc., Cotenso. Middle Island : Nelson, Tra- 
vers. Lord Auckland's group and Campbell’s Islands, J. B. H. Perhaps a variety 
of C. oblonga. 
4. G. rivuiaris, Hook.f. — Nematoceras, FI. N. Z. i. 251. Leaf nearly 
sessile, orbicular ovate ovate-cordate or oblong-cordate, obtuse acute or acu- 
minate, membranous, often 2-lobed at the base. Flower ^— §■ in. long. Upper 
sepal narrow, acuminate ; lateral and petals filiform, 1-1 4 in. long. Lip 
involute, when spread open trowel-shaped, recurved ; tip retuse or apiculate ; 
margins undulate. — Aciantlms rivuiaris, A. Cunn. 
Northern aDd Middle Islands: common on mossy trees, etc., in shady ravines. 
Lord Auckland’s group, Bolton. 
5. C. macrantha, Hook.f. — Nematoceras, FI. N. Z. i. 249. Much the 
largest and stoutest species, often 6-10 in. high. Leaf usually with a long 
very stout petiole, 1-1^- in. broad, coriaceous or fleshy, oblong-orbicular, cor- 
date or 2-lobed at the base, obtuse or apiculate, rarely 3-lobed, with a broad 
thickened margin, much reticulate. Flowers on short scapes at the base of 
the petiole, 1 in. long, lurid purple. Upper sepal narrow, acuminate ; 
lateral and petals very narrow linear, almost filiform, 1-2 in. long. Lip 
large, recurved, very broad, almost 2-lobed, strongly undulate. 
Throughout the central parts of the Northern and all the Middle Island: not un- 
common in damp shady woods, Cotenso, etc. Lord Auckland’s group, Bolton. 
10. MICROTIS, Banks and Solander. 
Erect, slender, green herbs. Boot of oblong tubers. Leaves 1—2 in., very 
slender, sheathing at the base. Flowers minute, green, spiked, fleshy, spread- 
ing. — Sepals : upper connivent with the petals, and together with them form- 
ing a hood ; lateral placed under the lip. Petals small, ascending. Lip pen- 
dulous, small, entire, sessile, with 2 thickened glands at the base. Column 
short, with 2 lateral lobes ; anther terminal. Pollen-masses 4, powdery. 
A genus of several Australian and a few New Caledonian, Java, and New Zealand species. 
1. M, porrifolia, Sprengd ; — FI. N. Z. i. 245. Very variable in 
