SALEP 



141 



FIG. 62. Salep. A, longitudinal section through the middle of a young tuberous 

 root or tuber, showing portion of the old tuber (A) and the vascular bundles 

 ((?/) connecting the two tubers, and the following parts of the young tuber; 

 s, b, u, bud scales; w, root; h, root-cap, the whole being developed within 

 the tissues of the axis of the mother tuber in a kind of sac (P). B, a pair of 

 tubers, the one on the right being the parent tuber, and that on the left the 

 young tuber from which the new plant will be developed in the coming season. 

 The latter shows the remains of the sac-like scale (P) and through which 

 the tuber has developed. C, longitudinal section through some of the paren- 

 chyma cells (P) showing the mucilage cells (S) with their small bundles of 

 raphides. D, a radial vascular bundle showing the alternating plates of 

 leptome (S) and tracheae (7 1 ). After Meyer, 



