ORCHIDACRAR. 
Pterostylis.| een, 355 
T. F. C.; Tirau and other places in the Upper Thames Valley, 7. F. C. ; Kaitoke, 
Tararua Mountains, B. C. Aston! Day’s Bay, Wellington Harbour, E. H. Atkinson ! 
Sea-level to 1000 ft. October—November. 
A very remarkable little plant, at once recognized by the filiform exserted lip 
plumose with bright-yellow hairs. It is a common Tasmanian plant, and is also found 
in South Australia, Victoria, and New South Wales. 
13. P. mutica R. Br. Prodr. (1810) 328.—Rather stout, 2-5 in. high. 
Leaves radical, forming a rosette at the base of the stem, sometimes 
withering at the flowering season, shortly petiolate, 4-?in. long, ovate, 
acute, veins reticulated. Stem with 2-5 large sheathing bracts above the 
leaves. Raceme 2-8-flowered ; flowers small, about }in. long, greenish- 
brown. Galea very broad, much incurved, obtuse or subacute at the tip. 
Lower lip small, reflexed, concave, nearly orbicular when spread out, 
2-lobed almost to the middle. Lip on a very short flat claw, lamina 
broadly oblong, obtuse ; appendage broad at the base, short and thick, 
entire, rounded or emarginate at the tip. Column erect; wings broad, 
the lower lobe or auricle broad, obtuse.— Hook. f. Fl. Tasm. ii (1860) 21, 
t. 1174; Benth. Fl. Austral. vi (1873) 362; Fitzgerald Austral. Orch. 1 (1877) 
pt. 2; Cheesem. in Trans. N.Z. Inst. xv (1883) 300; Man. N.Z. Fl. (1906) 
683. P. tristis Col. in Trans. N.Z. Inst. xviii (1886) 271. 
Nortu Istanp: Hawke’s Bay—Waipawa River, H. Hill! Sourn IsLanpD: 
Canterbury—Lake Lyndon and Lake Grassmere, J. D. Hnys! Lake Heron, Cockayne ; 
Ashburton, H. H. Allan! Cass River, Cockayne and Foweraker ; Mount Arrowsmith, 
Cockayne and R. M. Laing. Otago—Lee Stream, Sydney Fulton! Horse Range, Naseby, 
St. Bathan’s, Cambrian’s, Petrie / Sea-level to 2500 ft. November—January. Cp wee 
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, subulate-lanceolate. Lip equalling the petals, 
sessile or nearly so, undivided, base with 2 adnate calli, disc 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. 
Avie tok my - 2169 
1. A. Sinelairii Hook. f. Fl. Nov. Zel. i (1853) 245.—Stems slender, 
sometimes almost filiform, 1-6in. high. Leaf near the base or almost 
half-way up the stem, sessile, 4-14 in. long, broadly ovate-cordate, acute 
or acuminate, deeply bilobed at the base, membranous, 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, con- 
cave, base with 2 large calli, tip thickened and studded with minute fleshy 
12* 
