labellum anterior, and were formerly called by us Colax, 

 while a few have the labellum posterior, and were con- 

 sidered a distinct genus, to which we gave the name Xylo- 

 bium. An examination of many new species, and a recon- 

 sideration of the whole subject, has convinced us that the 

 two last-named genera, together with Maxillaria, form one 

 natural group, which is defined by its having two entire 

 or split pollen masses attached by a broad caudicula and 

 distinct gland to the rostellum, and a labellum that is 

 neither inflated nor spurred, articulated with the elongated 

 base of the column. It is by the latter character chiefly 

 that it is distinguished from Cymbidium. 



Of the genus thus limited, thirty -nine species are 

 known, of which the following is a brief enumeration : — 



§ 1. Axilliflorse. Pedunculi axillares (Eumaxillaria). 



1. M. undulata. Fl. Peruv. syst. 221. 



2. M. variegata. lb. 



3. M. ligulata. lb. 



4. M. hastata. lb. 



5. M. paniculata. lb. 



6. M. cuneiformis. lb. 



7. M. bicolor. lb. 



8. M. tricolor. lb. 



9. M. triphylla. lb. 



10. M. undatiflora. lb. 



11. M. prolifera. lb. 



12. M. ramosa. lb. 



13. M. longipetala. lb. 



*13.fM. ochroleuca. Lodd. bot. cab. ined. 



14. M. platypetala. lb. 



*15. M. alba = Dendrobium album. Hooker cxot.fi. t. 142. 



§ 2. Scapigerse. Peduncidi radicates. 

 *Labellum anticum (Colax). 



*16. M. stapelioides. Link et Otto abbild. p. 111. t. 52. 



*17. M. subulata. Formerly cultivated in the Kew Garden. 



*18. M. tetragona. Lindl. in bot. reg. t. 1428. 



*19. M. viridis. lb. t. 1510. = M. placanthera. Hooker in bot. mag. 

 t. 3173. 



*20. M. Deppii. Lodd. bot. cab. t. 1612, 



•21. M. Parkeri. Hooker in bot. mag. t. 2729. 



*22. M. aromatica. Graham in Hook. exot. fl. t. 219. = Colax aro- 

 maticus. Spreng. 



*23. M. Barringtonise. Lodd. bot. cab. t. 1824. = Epidendrum Bar- 

 ringtonise Smith. = Dendrobium Barringtonise Sivartz. = Colax 

 Barringtonise Lindl. = Dendrobium ciliatum Swartz. — Maxil- 

 laria ciliata Fl. Peruv. syst. Bot. reg. t. 1206 



