1922] ARBER—LEAVES OF FARINOSAE 93 
ep, epidermis; s, sheath; pet, petiole; /, limb; #, node; ax, axis; in all sections 
of equitant leaves, the identity of abaxial and adaxial margins has had to be 
decided on internal evidence, owing to fragmentary character of herbarium 
material available. 
PLATE I 
Fic. 1 A-D.—Reslio tremulus R.Br.: A, axis bearing leaf (X}); B, trans- 
verse section sheath of leaf (X14); C and D, transverse section limb of another 
leaf (X23); D nearer apex than C. 
Fic. 2.—Leptocarpus peronatus Mast., axis bearing leaf (3). 
Fic. B.—Anarthria scabra R.Br.: A, transverse section leaf limb 
(X14), section slightly reconstructed at Gpnet margin; B, dorsal (abaxial) 
margin of A 
Fic. 4 A-C.—Anarthria gracilis R.Br., transverse section one leaf: A, 
sheath peels slightly reconstructed at margins of arene B, basal part of 
limb; 2 limb (X 23). 
G. 5 A-C.—Gaimardia australis Gaudich.: A, leaf (X33 circa); Band C 
icv. section of one leaf (X77); B, sheath; C, limb. 
Fic. , B.—Hewardia tasmanica Hook. (for comparison): A, transverse 
section leaf limb (X23); B, upper margin of A (X77) 
Fic. 7.—Monochoria hastaefolia Presl, limb of leaf to show venation (X34). 
Fic. 8 A~C.—Eichhornia speciosa Kth.: A, small leaf to show dilated 
petiole and ligular sheath (lig.s) (4); B, top of sheath from A, viewed from 
adaxial side to show three ligular lobes (X}); C, transverse section through 
margin of leaf limb in A, in direction of arrow (X14); 7b, normally orientated 
bundles; ib, inverted bundles. 
Fic. 9.—Streptolirion volubile Edgw., axis bearing leaf (X 4). 
Fic. 10.—Tritonia, garden hybrid (for comparison), margin of ensiform 
leaf ( : ab 3). 
. 11 A~B.—Centrolepis aristata R and S.: A, axis of small plant bearing 
bithnaeees inclosed in bracts (0, 0), foliage leaf to right (X}3); B, transverse 
section sheath foliage leaf (X23); B, transverse section limb (X77); bs, bundle 
sheath, consisting of one inner thick-walled layer, and one outer layer of 
larger cells with thinner walls. . 
PLATE II 
Fic. 12 A-C.—Xyris Wallichii Kth.: A, transverse section leaf limb 
(X23); B, stomate from A (198); C, margin of A (X108). 
1G. 13 A-C.—Xyris asperata Kth. (trachyphylla Mart.): A, transverse 
section transition region between sheath and limb (X23) to show bundle 
groups; B, bundle group marked x in A (X77); group of four bundles (;, b:, 
b;, b,), in common fibrous sheath, from transverse section of leaf limb (X 318). 
1G. 14 A-D.—Xyris anceps Lam.: A, transverse section limb of leaf 
(X23); 61, single bundle; 6,, group of two bundles; 6;, group of three bundles; 
B, apex of leaf limb viewed as solid object (X23); C, fibrous margin of leaf 
viewed as solid object (X77); D, transverse section margin of A (X77). 
