Dixon — Mahogany, Recognition of some Different Kinds. 473 



filaments of parenchyma often traverse schizogenous spaces obliquely. — Fibres 



non-septate. 



36. Di/soxylon lessertianum. 



No. 197, from the Museum of Economic Forestry, Sydney, N.S.W., 



marked " Rosewood, Dysoxylon Lessertianum (Fraserianum), Benth." PI XL, 



figs. 109, 110, 111. 



Rose-brown, with slight purple tinge, not lustrous, roey ; scented 

 (resembling sandal wood and cedar oil). Vessels scattered, without 

 contents. Parenchymatous laminae close, about 0'3 mm. apart ; thick and 

 undulating enclosing vessels. Sp. gr. = 0"77. 



C.S. — Vessels round, scattered, or in small radial groups; larger vessels in 

 middle of group, tailing off into smaller ones radially. 15-25 groups in 2-nim. 

 field. M.T.D. = 0-20 mm. ; occasional dark contents. — Fibres thick-walled. — 

 Laminar parenchyma undulating, often merging into circumvasal, 3-8 cells 

 thick ; occasionally with dark contents. — Rays with dark contents. 



T.S.— Bays irregular, sides parallel, acute, about 55 in 2-mm. field. Total 

 width in 2 mm. = 0'30 mm. Height = P0-0-1 mm. Width 0-028 mm. 

 1-2-ply. Margin not differentiated. Ray cells thick-walled, with dark 

 contents. — Fibres septate, with deposit on septa. — Lenticular thickenings 

 covered with greenish deposit on oblique vascular septa. 



R.S. — Fibres septate. 



37. Pterocarpus indicus. 



No. 214, from commercial source, labelled "Andaman Padouk." PI. XL., 

 figs. 112, 113, 114. 



Crimson, streaked with black, lustrous, not roey, hard, polishes on . end 

 grain. Vessels distinctly zoned, dark and light zones of fibres. Parenchy- 

 matous laminae fine but distinct, discontinuous, undulating. 0*5-0 2 mm. 

 apart, closer in the dense zones Laminae sometimes anastomose. Storeyed 

 structure of wood conspicuous. Sp. gr. = - 75. 



C.S.— Vessels round, isolated or in groups of 2 or 3. M.T.D. = 0'28 mm. 

 4-10 groups in 2-mm. field. Occasional contents. — Fibres thick-, or moderately 

 thick-walled, 3-6 between rays.— Circumvasal parenchyma inconspicuous ; 

 laminar parenchyma undulating ; 2-3-4 cells thick. — Rays fine, empty. 



T.S. — Rays uniform, in regular oblique series ; about 200 in 2-mm. field ; 



total width in 2 mm. = 046 mm. Height = 011 mm. (O'U-0'12 mm.); 



5-8 cells. Width = 0-15-0-20 ; 1-, 2-ply. Margin not differentiated. Cells 



empty, or with transparent aggregated contents ; radial intercellular spaces. — 



Fibres non-septate, 3-6 between rays.— Laminar parenchyma with oblique 



or horizontal walls. 



1 e2 



