ORCHIDACEAE. 301 
A very extensive and distinct family, found in almost all parts of the world, but 
rare or absent in extreme northern or southern latitudes, and on the tops of high alpine 
mountains. Most of the species found in temperate countries are terrestrial; but in 
the tropics the greater number are epiphytes, growing upon the branches or trunks of trees 
A oa en — a a 2 eS ey omy YT 
add. PETALOCHILUS 
See T.N.Z.I. vol.56 (1926) ,p.16. 
1. P. calyciformis 
f } pF | rene J. —— aw | 
~ apn be ~ 19 
** Pollinia attached to the rostellum by a caudicle. 
Stems short, leaves few. Flowers small, in lateral racemes. Lip 
3-lobed .. “i wa . a bs .. 4, SARCOCHILUS. 
B. Terrestrial, with tuberous roots and annual stems. Pollinia granular or powdery. 
* Leaves long, very narrow-linear, flat or terete. 
a. Leaves more than one. 
Flowers numerous, on a spirally twisted spike. Dorsal sepal and 
petals connivent into a hood. Jip undivided . .. 5, SPIRANTHES. 
Flowers several, spicate. Dorsal sepal broad, hooded; lateral 
linear or filiform, erect. Lip 3-lobed ‘4 ss .. 7, ORTHOCERAS. 
b. Leaf solitary. 
Sepals, peta!s, and lip all similar in shape, petaloid: Column very 
short, not attached to the lip at the base -" r 
Dorsal sepal concave. Petals much smaller. Surface of lip covered 
with long hairs. Column very short RS he .. 14, CALOcHILUS. 
Dorsal sepal concave. Lip uppermost, undivided, usually with an 
adnate gland on the disc. Column very short, with two lateral 
erect appendages 4 oa ae - a 
Dorsal sepal concave. Lip below, entire or 2-lobed. Column very 
short .. ei as oh ae os .. 8 Micromis. 
Sepals and petals all linear. Lip uppermost, articulate, clawed ; 
lamina peltate, irritable and mobile. Column long, winged .. 10. CaLEana. 
Sepals and petals narrow. Lip entire or 3-lobed, not jointed or 
irritable, disc with glandular processes, margin often fringed. 
Column long, winged above +! 8 a .. 16, CALADENIA. 
6. THELYMITRA. 
9, PRASOPHYLLUM, 
** Leaves shorter, two or several, oblong or lanceolate or linear. 
Leaves numerous; radical broad, sometimes wanting; cauline 
narrow. Flowers hood-shaped, green. Laterai sepals united 
at the base. Lip narrow, irritable, with a basal appendage .. 11. PTEROSTYLIS, 
