684 ORCHIDE. [Pterostylis. 
the lower lobe or auricle broad, obtuse.—Hook. f. Fl. Tasm. ii. 21, 
t. 1174; Benth. Fi. Austral. vi. 362; Fitzgerald, Austral. Orch. i. 
pt. 2; Cheesem. in Trans. N.Z. Inst. xv. (1883) 300. P. tristis, 
Col. in Trans. N.Z. Inst. xviii. (1886) 271. 
NortH Istanp: Hawke’s Bay—Waipawa River, H. Hill! Souru Isbanp: 
Canterbury— Lake Lyndon and Lake Grassmere, J. W. Hnys! Otago—Lee 
Stream, Sydney Fulton! Horse Range, Naseby, St. Bathan’s, Cambrian’s, 
Petrie ! Sea-level to 2500 ft. November—January. 
An abundant Australian plant, ranging from Queensland to Tasmania. 
12. ACIANTHUS, R. Br. 
Small tender terrestrial herbs. Root of rounded tubers at the 
end of long fleshy fibres. Leaf solitary, sessile, cordate. Flowers 
few or many in a raceme, rarely solitary; bracts usually small. 
Upper sepal erect or curved over the column, concave, rather 
narrow, acute or acuminate; lateral sepals narrower, often almost 
filiform, erect or spreading. Petals shorter than the sepals, subu- 
late-lanceolate. Lip equalling the petals, sessile or nearly so, 
undivided, base with 2 adnate calli, dise smooth or papillose. 
Column elongated, erect or incurved, semiterete or winged; stigma 
cup-shaped, placed under the rostellum. Anther terminal, erect, 
2-celled; pollinia 2 or 4 in each cell, granular. 
A genus comprising 7 species: 4 in Australia, 2 in New Caledonia, and 1 in 
New Zealand. 
1. A. Sinclairii, Hook. f. Fl. Nov. Zel. i. 245.—Stems slender, 
sometimes almost filiform, 1-6in. high. Leaf near the base or 
almost half-way up the stem, sessile, 4-l4in. long, broadly ovate- 
cordate, acute or acuminate, deeply bilobed at the base, mem- 
branous, often purple beneath, veins reticulated. Flowers 2-12, 
shortly pedicelled, +in. diam., green; bracts ovate, acute, the 
lowest sometimes foliaceous. Upper sepal ovate-oblong, aristate, 
3-nerved ; lateral sepals and petals subulate-lanceolate, acuminate. 
Lip horizontal or deflexed, ovate-lanceolate, concave, base with 
2 large calli, tip thickened and studded with minute fleshy papillee. 
Column arched over the lip, much thickened and expanded towards 
the tip. Pollinia 2 in each anther-cell, deeply bilobed.—Handb. 
N.Z. Fl. 264. 
KerrMADEC Is~tAnDs, NortH Istanp: Abundant in lowland districts through- 
out. SourH IsxtaAnp: Marlborough—Pelorus Sound, J. Maemahon! Nelson— 
Dun Mountain, Kirk! near Westport, W. Townson! CHatTHAM Is~taNDS: Abund- 
ant, #. A. D. Cox! Miss Seddon ! Sea-level to 2500 ft. May-August. 
For an account of the fertilisation, see a paper by myself in Trans. N.Z. 
Inst. vii. 349. 
