38 NATIVE BRITISH ORCHIDACE^ 



of which, due to their remarkable hygroscopic character, jerk out the seeds ".' Seeds 

 (PL F, fig. 5) scobiform (like sawdust), innumerable, minute, with a tliin, loose, 

 netted covering (testa) as transparent as glass, and an oval, dark-coloured embryo, 

 without endosperm (albumen). 



CONSPECTUS OF GROUPS OF BRITISH SPECIES 



Family: ORCHIDACEiE Lindley. 



Sub-family: D i an dr;e Salisbury. Fertile anthers 2 



Tribe: Cypripedieae Lindley. 



Genus : Cypripedium. 



Sub-family: Monandr;e Swartz. Fertile anther i 



Acrotona Pfitzer. 

 Pollinia without or with only apical caudicles, anther detachable. 



Tribe I : Neottieae Lindley. 



Genera : Cephalanthera, Epipactis, Listera, Neottia, 

 Goody era, Spiranthes. 



Tribe II : Malaxideae Lindley. 



Malaxis, Liparis, Corallorhiza. 



Tribe III : Epipogonese Parlatore. 



Epipogon, 



Basitona Pfitzer. 



Pollinia with basal caudicles, anther in one piece with column. 



Tribe IV: Ophrydeae Lindley. 



Sub-tribe i : Gymnadeniinse Engler. 



Viscidia not enclosed in a pouch left behind when they are removed. 

 Herminium, Coeloglossum, Platanthera, Gymnadenia. 



Sub-tribe 2 : Serapiadinse Engler, 



Viscidia kept moist in a pouch left behind when they are withdrawn. 



Neotinea, Anacamptis, Himantoglossum, 



Aceras, Orchis, Ophrys. 



[Sub-tribe 3 : Habenariinse Engler {Habenariese Pfitzer). 



Stigmas projecting forwards in distinct often long processes. 



Habenaria, etc. About 400 species of warm climates. 



No European representative.] 



I Rendle, Classification of Flowering Plants, i, 371. 



