APPENDIX. 



xlvii 



roots in a perfectly healthy condition ; and 2. to know ex- 

 actly what the natural habits are of each particular species. 

 Upon the latter point at least we possess quite information 

 enough to authorize an attempt at their cultivation. In a 

 valuable paper by Mr. James Drummond, in the Gardener's 

 Magazine, vol. xiv. p. 425, are many particulars of direct 

 practical bearing upon this question. 



It appears that many of the species, such as Thelymitra, 

 Macdonaldia, Pterostylis, Diuris, Prasophyllmn, &c. have 

 roots like those of the English Orchis morio, (fig. 1), and they 

 will require the same kind of management.* 



The mode of growth of others is quite different. The 

 greater part of them have the roots extended to a consider- 

 able distance, that is, to the depth of several inches, under- 

 ground, terminated by a bulb, and thickly clothed with 

 numerous dry loose skins. In Glossodia (fig. 2 & 2*) Mr. 



For pennissiou to use the accompanying wood-cut, which wa« executed in 

 ition of Mr. Drummond's paper in the Gardener's Magazine, 1 am indebted 



illustration 



to Mr. Loudon. 



