152 CONSERVATIVE ORGANS. [t,ECT. IV. 



maculata. In fig. t, 1.1. represents the roots; 

 2. the withering tuber, the origin of the present 

 plant; 3. the new tuber, the pyramidal eleva- 

 tion on the top of which marks the point, whence 

 shall germinate the plant of the ensuing year. 

 5. The Bundled tuber (Tuber fasciculatum) 

 u. (fig. u) is spindle- 



shaped or nearly 

 cylindrical. Tu- 

 bers of this de- 

 scription " are 

 " "formed,andalso 

 " wither away in 

 " parcels," each 

 parcel being equi- 

 valent to a single tuber in the species already de- 

 scribed : they are well exemplified in Bird's-nest 

 Ophrys, Ophrys nidus avis (fig. u). 



Such are the closely attached tubers. From 

 the circumstance of the new tuber, or the sets of 

 tubers, being always formed laterally to the old, 

 the plant appears to perform a certain degree of 

 progression ; so that in a few years it is found at 

 some distance from the spot where it originally 

 flourished*. I have used the term, " the plant," 



* The cultivation of tuberiferous plants with closely at- 

 tached tubers, which are chiefly of the Orchis tribe, has always 

 been considered very difficult ; but it may be successfully ma- 

 naged as practised by the late Mr. Crowe, and thus described 



