464 Arber. — On the Leaf Structure of certain Liliaceae , 
the limb of Allium Dioscoridis (Fig. 30 B, p. 459), the sheath of Arhocrinum 
Drummondii (Fig. 16 A, p. 454 ) and the limb of Sowerbeia laxiflora (Fig. 15, 
p. 454). It may possibly be regarded as a phyl Iodic feature, since it 
0PH10PDG0N 
Fig. 38. Ophiopogon japonicus, Ker-Gawl. Fig. 38 A, transverse section oi young leaf(x 23) ; 
77 i. b. — median bundle; Lb. and Lb! — main lateral bundles. Fig. 38 B, l.b. on a larger scale; 
xy. — xylem ; ph. = phloem (x 318, circa). 
characterizes the marginal strands of the phyllodes of Oxalis bupleuHfolia , 
A. St. Hil., in which all the remaining bundles form a single normally 
orientated series. 1 
Acknowledgements. 
I have pleasure in acknowledging my indebtedness for living plants, or 
herbarium specimens, to Mr. J. H. Maiden, F.R.S., Director of the Botanic 
Gardens, Sydney ; Professor Ikeno, of Tokyo ; Dr. J. M. Greenman, Curator 
of the Herbarium, Missouri Botanic Garden ; and — in England — to the 
Director and to the Keeper of the Herbarium, the Royal Botanic Gardens, 
Kew ; the Curator of the Cambridge Botanic Garden ; the Keeper of the 
Botanical Department, British Museum (Nat. Hist.) ; and especially to 
Professor A. C. Seward, F.R.S., for permission to study material in the 
Herbarium of the Botany School, Cambridge. 
I wish also to express my thanks to Miss E. R. Saunders, Director of 
the Balfour Laboratory, where the present work has been carried out 
with the aid of a grant from the Dixon Fund of the University of London. 
1 Arber, A. (1918), Fig. 3 B, p„ 474. 
