T 
Orchidee. FLORA OF NEW ZEALAND. 251 
4. Nematoceras rotundifolia, Hook. fil.; caule elongato, folio rotundato cordato apieulato, scapo ex 
axilla folii orto brevi, bractea ovario eequilonga. 
Has. Northern Island. Clay banks. Manawatu, Colenso. 
I regret not having expanded flowers of this curious little plant; those I have in bud resemble N. oblonga in size 
and form of the pieces of the perianth. Stem slender, 1-2 inches long. Leaf orbicular, cordate, acuminate or 
apiculate, 4 inch broad. The flower rises from between the lobes at the base of the leaf in my specimens, but this 
may not be a constant character. I have leaves of this or a very similar plant from Lord Auckland’s Group. 
5. Nematoceras rivularis, Hook. fil. ; folio subsessili ovato-cordato basi bilobo apice retuso apiculato, 
bractea subfoliacea ovario breviore, flore mediocri, sepalo supremo lineari-oblongo acuminato lateralibus 
labello duplo longioribus, petalis longissime lineari-setaceis sepalis duplo longioribus, labello trulliformi 
recurvo marginibus undulatis apice angustato retuso apiculato, columna mediocri. Acianthus rivularis, 
4. Cunn. Prodr. Lindt. Gen. et Sp. Orchid. 
Has. Northern Island; in shaded ravines. Wangaroa Bay, A. Cunningham. Auckland, Captain 
Hautain. 
This resembles N. triloba very closely, but the leaf is shortly petiolate, and the labellum of a very different 
form, being trowel-shaped, much recurved, with a retuse truncate apex. The leaf also is longer and ovate. 
Obs. I have several species or varieties of this genus, from the Middle and Southern Islands, gathered by Dr. 
Lyall, and from Lord Auckland’s Group; but they are not in a fit state for determination. 
Gen. XVI. GASTRODIA, Br. 
Perianthii foliola in tubum apice 5-fidum basi ventricosum connata. Zabellum posticum, inclusum, 
liberum, unguiculatum. Columna cava, basi antice stigmatosa. Anthera terminalis, decidua. Pollinia 4 
? o 5 o > 
per paria coheerentia.—Herbee terrestres, aphylle ; scapo vaginato ; floribus racemosis. 
A curious genus, belonging to a small section of the family, of which very few species are known; they inhabit 
dark woods, one in New Zealand, another in Tasmania and Australia. A very few closely allied plants occur in 
Java, the Indian mountains, and in Siberia; all are leafless parasites, and are of a uniform pale brown colour. G. 
Cunning ghamii has a root as thick as the fore-finger, sometimes eighteen inches long, full of starch, and eaten by the 
natives.—Stem 1-2 feet high, stout, bearing here and there semi-amplexicaul, obtuse, membranous, alternate or 
opposite and connate bracts. Raceme 6-10 inches long. Flowers 20-50, shortly pedicellate, pendulous, with short 
scarious bracts. Perianth tubular, split half-way down the back, gibbous or swollen below, five-toothed, + inch long, 
fleshy. Zip free, clawed; claw winged; lamina linear-oblong, membranous, waved, with two thick ridges down the 
middle. Column very short. Anther two-celled, deciduous. Pollens two (or four in cohering pairs), of very large 
grains. Stigma a glandular surface in front of the base of the column, communicating by a cavity with the ovarium 
(Name from yaoryp, a stomach.) 
1. Gastrodia Cunningham, Hook. fil.; vaginis inferioribus oppositis connatis, racemo multifloro, 
labello basi truncato medio 2-cristato apice incrassato obtuso, columna brevissima. G. sesamoides, 
4. Cunn. Prodr. non Br. 
Has. Throughout the Islands; in deep woods. From the Bay of Islands, R. Cunningham, to Port 
Preservation, Lyall. Nat. name, “ Perei,” Col. 
Oss. Cheilogioltis cornuta and Lyperanthus Antarcticus, both natives of Lord Auckland’s C Group, have not yet 
“been gathered in New Zealand. 
