ORCHIDS OF JAMAICA 



KEY TO GENERA. 



I. Terrestrial Plants (growing in soil). 



Anther-cells distant, diverging, with the stalks of 

 the pollinia in special tubes and each ending 



in a naked gland 1. Habenaria. 



Anther-cells closely approximate. 



i. Leaves membranous, not plaited. Pollinia 



granular (i.e. breaking up into granules 



on removal), 2 or 4. 



Anther deciduous, opercular, on the margin 



of the clinandrium. Pollinia 2. Leaves 



along the stem or wanting 2. Pogonia. 



Anther persistent, parallel to the back of the 

 long rostellum. Pollinia 2 or 4. Leaves 

 generally radical. 



a. Lip on the lower side of the flower. 



Lateral sepals combined into a spur. 

 Spur enclosing the elongated base 



of the lip 4. Pelexia. 



Spur not enclosing base of lip. 



Bracts coloured 5. Stenorrhyncos. 



Lateral sepals free. 



Lip not spurred 6. Spiranthes. 



Lip spurred 7. Erythrodes. 



b. Lip on the upper side of the flower. 



Lateral sepals forming a spur. 



Spur short. Leaves wanting 8. Wullschlcegelia. 



Spur very Jong. Leaves present ... 9. Pseudocentrum. 

 Lateral sepals not forming a spur. 



Lip inserted at base of column, free 10. Cranichis. 

 Lip inserted on the cup formed by 

 the base of the sepals, which have 



grown together 12. Prescottia. 



Lip and petals inserted on the long 



column 13. Ponthieva. 



ii. Leaves membranous, not plaited. Pollinia 

 waxy (not breaking up into granules), 4. 

 Column long, curved. Anther terminal, 



opercular, incumbent, deciduous 17. Liparis. 



Column short, erect. Anther enclosed by 



the clinandrium, persistent 16. Malaxis. 



iii. Leaves papery, plaited. 



Flowers small, in terminal and axillary 

 panicles. Pollinia 2, granular. 

 Sepals cohering into a tube. Lip linear 



from base. Column long 14. Corymborchis. 



Sepals, lateral connate into a short chin. 



Lip saccate at base. Column short... 15. Tropidia. 

 Flowers large, racemose on a scape. Pollinia 

 4 or 8, waxy. 

 Pollinia 8. 



[Lip continuous with base of column, 



spurred. Flowers white and brown... 39. Phaius.~] 



