The genus Orchis is usually divided into sections, cha- 

 •"acterized by the nature of the tubercles of the roots, a dis- 

 tinction which obviously is inconvenient, and which is also 

 incompatible with a natural distribution of the species. A 

 better character may be obtained from the calyx, which in 

 some converges into a sort of casque or helmet (§. militares), 

 and in others is spread open or reflexed (§. mascul^.) The 

 sections of Orchis thus obtained are so extremely distinct 

 that it may be doubted whether, upon the principles on 

 which other genera are constituted, they should not be 

 considered each a genus. But so much inconvenience would 

 attend an alteration in the names of a great many common 

 species, that less disadvantage will perhaps arise from re- 

 taining the militares as a mere form of Orchis ; although the 

 inconvenience might be diminished by the creation of such 

 a name as Hevorclm. 



As some time must elapse before the appearance of the 

 fourth part of the genera and species of Orchidese, it may 

 be interesting to Botanists to know in what way we propose 

 to distribute the genera of Ophrydeae. We therefore avail 

 ourselves of the present opportunity to explain our present 

 views upon the subject. The following list will shew, firstly, 

 what the general arrangement of the tribe will be, and 

 secondly, what new genera we propose to establish. 



* AnthercB loculi contigui paralleli, basi nulla modo elongati v. 

 divaricati. 



1. Orchis.— 2. Anacamptis. — 3. Nlgritella. — 4. Glossaspis. — 5. Gymna- 

 dcnia. — 6. Scopularia nob. — 7. Aceras, as limited by Dr. Brown. — 8. Sera- 

 pias. — 9. Ophrys. 



** AnthercB loculi sejujicti, basi divergentes, scepc elongati. 



10. Monotris 7iob. — 1 1. Holothrix. — 12. Bartholina. — 13. Disa. — 14. Re- 

 pandra nob. {=T)'isa cornuta, &c.) — 15. Corycium. — 16. Dryopeia. — 17.Dispe- 

 ris. — 18. Pterygodium. — 19. Satyrium. — 20. Bonatea. — 21. Habenaria. — 22. Di- 

 plomeris Don (=Diplochilus Lindl.) — 23. Bilabrella nob. — 24. Cynorchis. — 

 25. Tryphia nob. (=Orchis secunda Thunb.) — 26. Bicornella nob. — 27. Ccelo- 

 glossum nob. — 28. Peristylus Blume (the calcarate Herminia.) — 29. Hermi- 

 nium (as limited by Dr. Brown.) — 30. Aopla nob. — 31. Platanthera, (:=Mecosa 

 Blnmr^ and including moyt of the North American Habenarias.) — 32. Perularia 

 nub. (=0. fiiscescens Z.) 



