ORCHIDACE^ 



spicuously longer than the labellum (cf. 

 H. volcanicd) 



Lip lanceolate, spur stout, longer than the lip 

 Lip linear or nearly so, dilated or lanceolate 

 in H. volcanica which has an elongated 

 filiform spur 

 Spur saccate, shorter than the lip 

 Spur about equalling the lip or slightly 

 longer 



8. H. hyperhorea 



var. purpiirascens 



9. H. behringiana 



10. H. saccata 



Spur much longer than the lip 

 Leaves reduced 

 Leaves elongated 



11. ^. Richardii 



12. H. Ghieshreghtiana 



13. H. nuhigena 



14. H. sparsiflora 



15. H. brevifolia 



16. H. volcanica 



17. H. limosa 



ft Leaves basal, rarely more than two, soon 

 withering in 18 and 19 

 1[ Leaves twice as long as broad or longer, 

 oblong or oblanceolate, never linear or 

 grasslike 



Spur more than twice as long as the lip 



Spur about equalling the lip 



Tin Leaves rarely twice as long as broad, often 

 orbicular 



Lip oblong, longer than the spur 

 Lip lanceolate, acute 

 Lip oblong-ligulate 



Spur 1.5-2 cm, long 

 Spur 3-4 cm. long 



18. H. eUgans 



var. maritima 



19. H. unalascensis 



20. H. obtusata 



21. H. Chorisiana 



22. H. Hookeri 



23. H. orbiculata 



24. H. macrophylla 



[ 16] 



