Page:Appendix to the first twenty-three volumes of Edwards's Botanical Register.djvu/57

 Rh roots in a perfectly healthy condition; and 2. to know exactly 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, Prasophyllum, &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 considerable distance, that is, to the depth of several inches, underground, terminated by a bulb, and thickly clothed with numerous dry loose skins. In Glossodia (fig. 2 & 2*) Mr.



For permission to use the accompanying wood-cut, which was executed in illustration of Mr. Drummond's paper in the Gardener's Magazine, I am indebted to Mr. Loudon.