certain Monocotyledonous Leaves . 34 1 
Figs. 17-21. Figs. 17 A-F, Curculigo recurvata , Dryand. Figs. 17 A, B, D, f, series of trans- 
verse sections through one leaf, passing from sheath, Fig. 17 A, to ‘ plicate lamina ’, Fig. 1 7 F ( x 14) ; 
m.b., median bundle ; l. l9 /. 2 , /. 3 , 1, /'. 2 , /'. 3 , main iaterals : Fig. 17 c, epidermis at region marked 
with cross in Fig. 17 B ( x 77) ; Fig. 17 E, epidermis of base of groove marked with cross in 
Fig. 17 d ( x 77). Figs. 18 a-f, Tamils communis , L., series of transverse sections through one Jeaf 
( X 23) passing from attachment of leaf and axis {ax., Fig. 18 a) to 1 lamina ’ (Fig. 18 f); c. and c 
cordate basal lobes of ‘ lamina ’ cut on either side of upper part of petiole, pet. Fig. 19, Dioscorea 
sativa, L., transverse section of apical bud, passing through axis, ax., and a series of leaves of which 
the one marked with a cross is cut nearest to its le.vel of attachment ( x 14). Fig. 20, Dioscorea sp., 
young leaf with axillary bud, b, to show narrow pointed apex, ap., which is becoming brown and 
shrivelled (about nat. size). Figs. 21 a-d, Tigridia Pringlei, S. Wats., sections through first 
plumular leaf, from sheath, Fig. 21 A, to plicate ‘ lamina’, Fig. 21 D, from a series in Miss Sargant’s 
collection ( x 47). The outer line represents the inner epidermis of the cotyledon sheath {cot. s.), 
which is only shown completely in Fig. 21 d; ax., plumular bud ; m.b., l. x and l %1 , main bundles of 
first plumular leaf ; cot. v.b., vascular bundle of cotyledon, which is cut twice, as it doubles on itself. 
