Orchidaceae. 



^2>7 



528 Lip much contracted in the middle, 

 528 Lip not contracted in the middle, 



529 Ovary straight, flowers drooping, . 



529 Ovary twisted, flowers erect, . 



530 Sepals and petals forming a hood, 

 530 Sepals and petals spreading, 



531 Lip 3.1obed, 



531 Lip 4-lobed, ..:... 

 532 Flowering stem leafy, 533 



532 Flowering stem leafless, . 



533 Lip linear, 2-lobed at the apex, 



533 Lip more or less swollen, 



529 



530 



. Epipactis VL 

 Cephalanthera VIL 



531 

 532 



Herminium XI. 

 . Aceras VIIL 



Spiranthes XIL 



Listera IX. 



Ophrys X. 



I.—NEOTTIA, 



NEOT'TIA NIDUS-A'VIS (81). Bird's-Nest. 6—7. Stem i ft. leaf- 

 (1329) less with brown scales, flowers brown iti a rather dense spike, lip 



linear with two terminal spreading lobes, root a mass of thick fibres. 



Dark woods, especially beech. 



IL— ORCHIS. 



Lip 3-Iobed spurred, pollen-glands in one pouch, flowers spiked, leaves 

 chiefly radical, root of tubers. 



Pollen-glands united, O. pyramidalis. 



Pollen-glands separate, 534 



534 Tubers of root palmate, 535 



534 Tubers of root 2 undivided, 536 

 535 Lip scarcely 3-lobed, sides reflexed, . , , . O. latifolia. 



535 Lip deeply 3-lobed, sides flat, O. maculata. 



536 Spike lax, 538 



536 Spike dense, 537 



537 Stem 4—5 in., O. ustulata. 



537 Stem i—i\ ft., O. militaris. 



538 Lateral sepals reflexed upwards, ... 0. mascula. 

 538 Lateral sepals arching and forming a hood with 



the petals, O. Morio. 



OR'CHIS PYRAMIDA'LIS (63). Pyramidal Orchis. 7—8. PoUen- 

 (1346) glands united, lip 3-lobed lobes broad, spur very long, flowers rose- 

 coloured in a dense pyramidal spike with a peculiar scarcely pleasant 

 odour. Pastures. 



N 



