ORCHIDACE.E. 



195 



sandy loam, The pots must be well drained. 

 They require a large supply of water when grow- 

 ing, which must be gradually diminished when they 

 have perfected their growth. When dormant they 

 need but very little water, and are benefited if 

 placed upon a dry shelf. 



Tankwillia — China — 1778 — March to April — Divis. 



The Tankwillia although a species of the Bletia 

 tribe, requires a quite different soil. It flourishes 

 well in one part of decomposed horse droppings, 

 one part of good yellow loam, and one part peat, 

 with a little rough sand. 



Class, Gynandria. Order, Monandria. 



Brasavola cordata — Rio Janeiro — 1831 — January 

 — Division. 



glauca — Mexico — 1837 — January — -Di- 

 vision. 



grandiflora — Division. 



Glauca and grandiflora are decidedly the two best 

 species of this genus ; these thrive best in baskets, 

 or upon blocks of wood. When grown in baskets 

 plant them in open light peat and potsherds ; when 

 peat cannot be procured, use chopped sphagnum, 

 mixed with a little white sand. If grown upon 

 blocks of wood, secure a portion of moss to their 

 roots, and fasten the plants with copper wire ; they 

 should have an abundant supply of water when in a 



