ORCHIDACEAE. 
Corysanthes. | eee Ba oe | 367 
NortuH anp Souru Isuanps, Srewart IsLanD, CHATHAM ISLANDS, AUCKLAND AND 
CAMPBELL IsLANDS: Not uncommon in damp shaded places throughout. Sea-level 
to 4000 ft. October—December. | 
Closely allied to C. triloba, but much larger, the leaves rarely 3-lobed at the tip, 
the upper sepal acute or acuminate, and the lip larger. Both it and C. triloba frequently 
have the peduncle bent backwards, so that the flower lies with the upper sepal under- 
most and the lip above. ; 
1570 | 340. 
a 
21. GASTRODIA R. Br. “den Hoke T7 
Leafless terrestrial brownish herbs. Root long, tuberous, usually parasitic 
on the roots of other plants. Stem simple, erect, furnished with lax sheath- 
ing scales. Flowers in a terminal raceme. Sepals and petals connate into 
a ventricose 5-lobed tube more or less slit on the anterior side. Lip shorter 
than the perianth, attached at the base to the foot of the column, and 
adnate at the back to the perianth-tube; lamina erect, furnished with 
longitudinal raised lines or naked, margins undulate. Column long or short, 
narrowly 2-winged ; rostellum small; stigma near the base of the column, 
prominent. Anther lid-like, incumbent ; pollinia free, granular. 
A small genus of 10 or 12 species, ranging from New Zealand and Australia north- 
wards to Malaya, the Himalayas, China, and Japan. 
Raceme 2-8in., many-flowered. Perianth #in. Column elon- - 
gated, 2 the length of the lip “ es ay .. 1. G. sesamordes. 
Raceme 6-12 in., very many flowered. Perianth }in. Column 
very short, barely + the length of the lip .. af 
Stem slender, almost filiform. Raceme 1-3in., 3-—5-flowered. 
Perianth in. Column very short, barely + the length of the lip 3. G. minor. 
2. G. Cunningham. 
i Lpa, 
G. Hectort Buch: in Trans. N.Z. Inst. xix (1887) 214 is shown by the specimens in 
Mr. Buchanan’s herbarium to be a Prasophyllum, probably P. patens R. Br. 
I. G sesamoides f. Br. Prodr. (1810) 330.—Root very long and 
tuberous. Stem stout or slender, 1-24 ft. high, mottled grey; sheathing 
scales loose, truncate or with an obtuse point. Raceme 2-8 in. long, many- 
flowered ; bracts scarious, broadly ovate, shorter than the pedicels. Flowers 
brownish-white, about %in. long without the ovary, drooping. Perianth 
ventricose, gibbous at the base, shortly 5-lobed; lobes short and broad, 
ovate, constricted at the base. Lip slightly shorter than the perianth ; 
lamina oblong, with 2 thick ridges up the median line, which coalesce into 
one nearsthe tip, margins much crisped and undulate. Column elongate, 
almost as long as the lip, angular, narrowly winged above; stigma a large 
protuberance at the very base.—Hook. f. Fl. Tasm. 11 (1860) 31, t. 126; 
Benth. Fl. Austral. vi (1873) 309; Fatzgerald Austral. Orch. ii (1891) pt. 5; 
Cheesem. Man. N.Z. Fl. (1906) 697. 
Nort Isnanp: Auckland—Kaitaia, R. H. Matthews! H. B. Matthews! Northern 
Wairoa, T. F.C. ; Opepe, Taupo, 7. F. C.; East Cape district, Adams and Petrie / 
Sout Istanp: Westland, Kelly’s Creek, Petrie / Sea-level to 1500 ft. December- 
January. 
The long slender column at once separates this from the following species, which 
it otherwise much resembles. In Australia it ranges from Queensland to Tasmania. 
2. G. Cunninghamii Hook. f. Fl. Nov. Zel. i (1853) 251.—Habit and 
appearance of G. sesamoides but usually smaller and more slender, 1-3 ft. 
high or even more. Stem brownish, often striped and spotted with purple 
or fawn colour. Raceme 6-10 in. long, very many flowered, pedicels slender, 
2-3 n.; bracts ovate, acute, scarious. Flowers brownish-white, 4 in. long 
6 
