32 Orchidaceae 



Tribe 3. Neottieae (only tribe). 



Subtribe i. Cephal anther inae. Labelluni with distinct 

 proximal lobe {hypochiliimi) which is often spurred. 

 Anthers erect. Rostellnm short or absent. 



a. Stem leafy : no spur. 



Flowers in racemes, ovary straight. Epipactis. 



Flowers in spikes, ovary twisted. Cephalanthera. 



/5. Stem scaly, without foliage leaves, labellum 

 spurred. 



Labellum turned upwards, column short. Epipogon. 



Subtribe 2. Spiranthinae. Leaves soft, net-veined. 

 A7itJier as long as the beaked rostellum and lying 

 against it. Pollinia not divided into distinct masses. 



A. Median sepal and petals forming a helmet sur- 

 rounding the base of the labellum. 



Spike spirally twisted. Spiranthes. 



B. Sepals and petals standing apart. 



Scape with two opposite leaves. Listera. 



Scape brown, leafless. Neottia. 



Subtribe 3. Physiirinae. As above but pollinia 

 divided into numerous distinct masses. 



Rhizome creeping, leaves several. Goodyera. 



II. Duplicatae. Leaves folded in bud. 



Tribe 4. Liparideae. Pollinia 4, waxy, without 

 appendages. 



A. Foliage leaves present. 



Column short, straight. Anther persistent. Malaxis. 

 Column slender, bent forwards. Anther deciduous. 



Liparis. 



B. No foliage leaves. Roots absent. Rhizome 

 branched, coral-like. Corallorhiza. 



