considered in Relation to the Phyllode Theory. 
459 
ALUUM (sect, MOLIUM. , NECTAROSCORDUM MICROSCORLUM) 
Figs. 28-31. Leaf structure of Allium. Figs. 28A-E, Allium ursinum , L. (Sect. Moliuni). 
Fig. 28 A, leaf of non-flowering plant (£ nat. size). Fig. 28 B, sheathing base of leaf of flowering 
plant (| nat. size). Fig. 28 c, transverse section of sheath at level X; Fig. 28 D, transverse section 
of petiole at. level Y; Fig. 28 e, transverse section of limb at level z (Figs. 28 c, d, e, x 14). 
(Note partial twisting in Fig. 28 c, and inversion in Figs. 28 d and e.) Figs. 29 A-c, Allium Moly, 
L. (Sect. Moliuni). Fig. 29 a, sheath just above the great swelling which forms the bulb ; Fig. 29 b, 
apparent petiole; Fig. 29 c, limb of leaf. (All x 14.) Fig. 30 a and b, Allium Dioscoridis , Sibth. 
et Sm. (Sect. Nectar oscorduni). Fig 30 A, transverse section of limb of leaf (x 14); k = keel. 
Fig. 30 b, margin of limb in Fig. 30 a, further enlarged to show orientation of marginal bundles 
(x 47); Figs. 31 A-c, Allium monant hum , Maxim. Fig. 31 A, transverse section of apparent 
petiole ; Fig. 31 b, transverse section of intermediate region ; Fig. 31c, transverse section of base of 
limb. (All x 14.) There is probably a good deal of distortion in Figs. 30 and 31, due to 
imperfect recovery of form of the herbarium material used. 
