ORCHIDEÆ.
661
| The New Zealand species forming small matted patches on the trunks of trees, furnished with pseudobulbs. Flowers on a scape rising from the base of the pseudo bulb. Lip jointed on to the base of the column, mobile | 2. Bulbophyllum. |
| Stems leafy, unbranched. Flowers in terminal panicles. Lateral sepals free. Lip 3-lobed | 3. Earina. |
| ** Pollinia attached to the rostellum by a caudicle. | |
| Stems short, leaves few. Flowers small, in lateral racemes. Lip 3-lobed | 4. Sarcochilus. |
| B. Terrestrial, with tuberous roots and annual steins. 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. Lip undivided | 5. Spiranthes. |
| Flowers several, spicate. Dorsal sepal broad, hooded; lateral linear or filiform, erect. Lip 3-lobed | 7. Orthoceras. |
| b. Leaf solitary. | |
| Sepals, petals, and lip all similar in shape, petaloid. Column very short, not attached to the lip at the base | 6. Thelymitra. |
| Dorsal sepal concave. Petals much smaller. Surface of lip covered with long hairs. Column very short | 14. Calochilus. |
| Dorsal sepal concave. Lip uppermost, undivided, usually with an adnate gland on tbe disc. Column very short, with two lateral erect appendages | 9. Prasophyllum. |
| Dorsal sepal concave. Lip below, entire or 2-lobed. Column very short | 8. Microtis. |
| 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 | 16. Caladenia. |
| ** Leaves shorter, two or several, oblong or lanceolate or linear. | |
| Leaves numerous; radical broad, sometimes wanting; cauline narrow. Flowers hood-shaped, green. Lateral sepals united at the base. Lip narrow, irritable, with a basal appendage | 11. Pterostylis. |
| Leaves 2–3, lanceolate. Upper sepal broad, concave; lateral narrow. Lip broad, papillose or ridged. Column not winged | 15. Lyperanthus. |
| Leaves 2, radical, oblong. Upper sepal broad, concave; lateral narrow-lmear. Lip broad, with raised glands on the disc. Column winged, wings produced into 2 erect lobes at the top | 17. Chiloglottis. |
| *** Leaf solitary, broad. | |
| Flower solitary, large, purple. Upper sepal broad, concave; lateral and petals long and filiform or minute. Lip large, broad, involute. Column very short | 20. Corysanthes. |
