Caleana.] ORCHIDE. 677 
versed through the ovary being recurved). Lip uppermost, jointed 
on to the base of the column or to a projection from it, mobile ; 
claw linear, incurved; lamina ovate or oblong, peltate, undivided, 
entire, smooth or tuberculate. Column elongate, sometimes pro- 
duced at the foot, broadly winged throughout its whole length, 
concave. Anther terminal, erect, 2-celled; pollinia 2-partite, 
granular. 
A small genus of 4 species, all of them natives of Australia, 1 extending to 
New Zealand. 
1. C. minor, f. Br. Prodr. 329.—Stem slender, wiry, almost 
filiform, 2-S8in. high, usually tinged with red. Leaf radical, about 
half as long as the stem, rather fleshy, channelled. Flowers 1-4, 
about #in. long including the ovary, greenish tinged with red, 
reversed; pedicels +-}in.; bracts minute, acute. Sepals and 
petals narrow-linear, slightly dilated above the middle, nearly 
equal; upper sepal attached just above the top of the ovary, the 
lateral affixed to the basal projection of the column. Lip upper- 
most, very remarkable in shape; the lower portion claw-like and 
articulated on to the basal projection of the column; the upper 
part expanded into a broad lamina which is peltately attached to 
the claw ; lamina convex above and covered with close-set reddish 
tubercles, which are largest towards the margins, under-surface 
smooth, concave. Column rather long, with a broad basal pro- 
jection, broadly winged all round, concave, forming a horizontally 
placed cup or pouch.—Cheesem. in Trans. N.Z. Inst. xxiv. (1892) 
411; Kirk, l.c. 425; Benth. Fl. Austral. vi. 366. 
NortH Isnanp: Auckland—Kaitaia, A. H. Matthews! Rotorua, Rev. 
F. H. Spencer! Waiotapu, H. J. Matthews ! December—January. 
A most remarkable little plant. The column is horizontally placed, form- 
ing a broad pouch; the lamina of the lip, when at rest, is elevated by the 
slender elastic claw, and swings directly above it. When an insect alights on 
the lamina it overbalances, shutting up the insect within the concavity of the 
column. For a full account of the fertilisation of the genus, reference should be 
made to Mr. Fitzgerald’s magnificent work on Australian Orchids (Vol. i. pt. 6). 
11. PTEROSTYLIS, R. Br. 
Terrestrial leafy herbs. Root of small rounded tubers on long 
fleshy fibres. Leaves radical and cauline, either all similar or the 
radical broader and ovate or oblong, often subrosulate; the cauline 
lanceolate or linear or reduced to sheathing bracts. Flowers large 
or small, greenish, usually solitary, rarely several in a terminal 
raceme. Upper sepal erect, incurved, concave, conniving with the 
petals and forming a broad boat-shaped hood (galea). Lateral 
sepals adnate at the base to the foot of the column, more or less 
connate into an erect or recurved 2-lobed lower lip; the lobes often 
drawn out into long acuminate points. Petals lanceolate, falcate. 
