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Arber . — The Leaf Structure of the Iridaceae , 
Ensiform Leaves ( Iridoideae ) 
Iris spuria 
Moiaesu Macleai (t T) 
Iris sp. (growing point) 
Figs. 1-14. (All figures in this paper, unless otherwise stated, are drawings of transverse 
sections of limbs of leaves, with the adaxial side towards the top of the page ; xylem, solid black ; 
phloem, white; fibres, dotted; m.b ., median bundle.) Fig. 1, Iris Pseudacortts, L. ( x 7 )> on ^y 
principal bundles indicated ; Fig. 1 A, sheath ; Fig. 1 B, limb. Figs. 2-4, Iris sibirica, L. ; 
Fig. 2, seedling (nat. size); s seed; c., cotyledon; l x and / 2 , first and second plumular leaves. 
Fig. 3, transverse section of l x at x ( x 23). Fig. 4, transverse section second leaf of another seedling 
at about level Y in / 2 (x 23). Fig. 5, Iris sp., longitudinal section stem apex with young leaves ; 
/., solid limb ; sh., sheath (x 14). Fig. 6, Iris sp., China ( x 14). Fig. 7, Iris Kaempferi , Sieb. 
(x 7). Fig. 8, Iris spuria , L. ( x 14). Fig. 9, Iris Douglasiana , Herb. (X 14), the palisade 
parenchyma, pal., more developed on left-hand face. Fig. 10, Iris tenuifolia, Pall, (x 14) ; lac., 
lacuna crossed by trabeculae. Fig. 11, Moraea Robinsoniana , C. Moore et F. Muell. ( x 14 . To 
economize space the section is drawn in two parts, A and B ; f, fibres. Fig. 12, Moraea Macleai , 
Hort. ; Fig. 12 a, limb at extreme top of junction with sheath, sh . ; d.m., dorsal margin ; f, fibres 
(x 14) ; Fig. 12B, dorsal margin of Fig. :2 A (x 47). Fig. 13, Schizostylis coccinea , Backh. et 
Harv. ( x 7) ; Fig. 13 A, sheath ; Fig. 13 B, limb. Fig. 14, Acacia pendula , A. Cunn. (x 14). 
