248 FLORA. OF NEW ZEALAND. [| Orchidee. 
Gen. XIV. PTEROSTYLIS, Br. 
Perianthium ringens, membranaceum. Sepalum superius cum petalis in galeam coheerens; laterales 
basi connata. Zabellum unguiculatum, subinclusum, basi gibbosum v. appendiculatum. Columna basi 
cum galea adnata, apice alata, medio stigmatifera. Anthera terminalis, persistens. Pollinia 4, compressa. 
— Herb tuberosa, terrestres, foliata ; floribus majusculis, membranaceis, viridibus. 
A large Australian and Tasmanian genus of herbaceous, delicate, membranous, or succulent transparent green 
plants.—Zeaves rosulate or sheathing up the stem. Flowers solitary in all the New Zealand species, usually large 
and green. Upper sepal concave, attached at the base to the back of the column, conniving with the linear petals 
to form a hood over the column; lateral sepals combined at the base, or up to the middle. Lip clawed, narrow, 
included in the perianth. Claw with a callus or a curved appendix. Column usually slender, winged above, with 
the stigma on the face about half-way up. Anier terminal. (Name from mrepos, a wing, and orvos, a column.) 
1. Pterostylis Banksii, Br.; caule folioso, foliis lineari-lanceolatis carinatis longe acuminatis, flore 
magno, perianthii foliolis longe caudatis, labello lineari basi appendicula curva lineari-elongata apice villosa. 
Bot. Mag. t. 3119. A. Cunn. Prodr. Lindt. Gen. et Sp. Orchid. 
Haz. Northern and Middle Islands. As far south:as Akaroa, Banks and Solander, etc. 
Much the largest and largest-flowered New Zealand species, 6-18 inches high. Leaves numerous, sheathing 
the whole stem, produced much beyond the flowers, narrow, grassy, acuminate. Flower 14-3 inches long. Sepals 
and petals produced into very long filiform tails. Zip with a long claw, narrow, linear-oblong ; appendiz long, 
curved, tipped with a pencil of hairs. 
2. Pterostylis australis, Hook. fil.; caule foliato, foliis anguste lineari-oblongis planis acuminatis, 
scapo ultra folia elongato, flore erecto, sepalis lateralibus subulatis erectis, supremo petalisque ultra medium 
decurvis longe acuminatis, labello lineari longe unguiculato, appendicula breviuscula curva apice peni- 
cillata. 
Has. Middle and Southern Islands. Port William and Thomson’s Sound, Lyall. 
Nearly as large as P. Banksii, but the leaves are shorter, broader, not keeled, reticulated. Stem sheathed by 
the leaves. Perianth 3-1 inch long, erect at the base, then suddenly curved downwards. Lateral sepals with 
subulate erect tips. Upper sepals and petals with long acuminate points. Zip as in P. Banksii, but the appendix 
is shorter. 
3. Pterostylis graminea, Hook. fil.; caule breviusculo foliato, foliis linearibus lineari-lanceolatisve 
acuminatis, perianthio suberecto lente curvo foliolis acuminatis, labello lineari-oblongo, appendicula brevius- 
cula curva penicillata. 
Has. Northern and Middle Islands. Auckland, Sinclair. East coast, Colenso. Otago, Lyall. 
A small species, 4-6 inches high, like a miniature of P. Banksii, but without the long tails to the perianth, 
which is only 1—2 inch long. 
4. Pterostylis micromega, Hook. fil.; foliis radicalibus petiolatis lineari-oblongis subacutis, caulinis 
superioribus vaginantibus, flore (pro planta) magno erecto lente curvo, petalis sepalisque acuminatis late- 
ralibus apice subulatis erectis, labello lineari, appendicula breviuscula apice penicillata. 
Haz. Northern Island, Zdgerley. East coast, Colenso. 
Stem slender, 4-8 inches long. Radical leaves few, petiolate, 2 inches long, linear-oblong, hardly acute; 
cauline numerous, upper sessile. Flower large for the size of the plant (whence the name), 13 inch long, erect, 
curved slightly. Sepals and petals acuminate ; lateral sepals with long, erect, subulate apices. 
