3 1 8 Arber . — The Leaf Structure of the Iridaceae , 
Figs. 40-9. (Throughout, p.m.r., pseudo-midrib; fibres ; fibrous margin.) Fig. 40, 
Sparaxis pulcherrima , Hook. ( x 14). Fig. 41, Acacia neurophylla , W. V. Fitz. ; Fig. 41 A, phyllode 
( x |) ; Fig. 41 B, transverse section phyllode not far from base, two upper bundles not yet united 
(x 14); a.p., assimilating parenchyma; Fig. 41 c, margin of a similar phyllode (whether dorsal 
or ventral uncertain) to show great development of fibres in proportion to vascular tissue. Fig. 42, 
Acacia uncinella , Benth., phyllode (x 14). Fig. 43, Gladiolus dracocephalus, Hook, (x 14). 
Fig. 44, Gladiolus sp. ; Fig. 44 A, adaxial side of limb to show fibrosis of pseudo-midrib 
and of ventral margin ( x 14) ; Fig. 44 B, dorsal margin of sheath region to show fibrosis ( x 47). 
Fig. 45, Gladiolus ornatus , KlatF ( x 47); Fig. 45 a, sheath; Fig. 4*5 B, limb. Fig. 46, Acacia 
incurva , Benth. , transverse section phyllode (x 23) for comparison with Fig. 45. Fig. 47, apex of 
leaf of Watsonia marginata , Ker-Gawl. ; fibrous rim,y*., which is bright yellow in herbarium material, 
indicated in black ( x |)| Fig. 48, Gladiolus tristis , L. ; Fig. 48 a, young plant (x |); sc. lt sc. 2 , sc. 3 
successive scale leaves; f.l., foliage leaf; c., corm ; r., roots. (Brown scale leaves have been 
removed from corm.) Figs. 48 B-E, series of transverse sections from base upwards through tallest leaf 
in Fig. 48 a, (x 23); r., subsidiary ridges; g., grooves; m.L, main lateral bundles; Figs. 48 F-J, 
similar series through another leaf ( x 14) ; k. and k'., keels ; r. and r\, subsidiary ridges. Fig. 49, 
Antholyza itervosa , Thunb., junction of top of sheath and base of limb (x |). 
