260 



33. Inflorescencp in a sheath with the 



young growth 

 Inflorescence not in a sheath ... 



34. Flowers large ... 

 Flowers minute... 



35. Leaves radical ... 

 Leaves cauline ... 



36. Leaves thin, broad 

 Leaves rather thick, linear 



36a. Leaves 1 to 3, 3-nerved 



Leaves several, more than 3-nerved ... 



37. Leaves distichous 

 Leaves not distichous ... 



38. Leaves 6-8 inches long, at least 



1^ inches broad 

 Leaves either shorter or narrower 



39. Leaves thick and leathery 

 Leaves thin and phcate 



40. Inflorescence panicled, 1 ft. long 

 Inflorescence much shorter 



41. Lip spurred or saccate... 

 Lip not spurred 



42. Flowers large, showy ... 

 Flowers small ... 



43. Spur of lip divided or almost closed ... 

 Spur of lip not divided or closed, saccate 



44. Spur of lip divided internally 



Spur of lip almost closed with a callus 



45. Flowers distichous ; rachis flat and 



pectinate 

 Rachis not flat and pectinate ... 



46. Leaves cordate or reniforra 

 Leaves not cordate or reniform 



47. Scapes stout 

 Scapes slender ... 



48. Scapes 2 ft. high or more 

 Scapes 1 ft. high or less 



49. Flowers in a 1-sided spike 

 Flowers not in a 1-sided spike 



11. Nephelaphyllum. 



34. 

 3. Dendrobium. 

 27. Thelasis. 



36. 



37. 



36a. 

 18. Cymbidium. 

 38. Cryptostylis. 

 15. Calanthe. 



38. 

 11. Nephelaphyllum. 



•22. 

 15. 

 26. 



28. 

 23. 

 24. 



21. 

 20. 



39. 



17. 

 19. 



7. 



39. 



40. 

 Acampe. 

 Calanthe. 

 Oniithochilus. 



41. 



42. 



45. 

 Detidrobium. 



43. 



44. 

 Tropidia. 

 Sarcauthus. 

 Cleisostoma. 



Sarcochilus. 

 Diploprora. 

 Pogonia. 



47. 



48. 



49. 

 Eulophia. 

 Geodorum. 

 Pachystoma. 

 Spathoglotiis. 



1.— MICROSTYLIS. 



1. M. congesta, Reichb. f. ; Dienia congesta, Lindl. ; Benth. Fl. 

 Hongk. 352. Mt. Victoria and ^Mt. Nicholson, Hong- 

 kong ; Lantao Island and Taimoshan, Hongkong New 

 Territory : Swatow. Fl. yellowish-green or purple, June. 



2.— LIPARIS. 



Key to species. 



1. Leaves lanceolate ... ... ... 9. 



Leaves ovate or oblong ... ... 4. 



2. Pseudobulbs 1 inch long 3. 



Pseudobulbs 4-6 inches long l, longipes. 



