468 Scientific Proceedings, Royal Dublin Society. 



spaced; 0-5-0-2 mm. apart, except in vessel-free zones, where they are absent. 

 In cross-section branching and anastomosing. Sp. gr. = 0"75. 



C.S. — Vessels round, isolated, or in small groups of 2-4. M. T. D. - 22 mm. 

 1-8 in 2-mni. field. Contents rare. Always adjoined by laminar parenchyma. 

 — Fibres thick- walled. — Parenchyma circumvasal: laminae often enlarging 

 round vessels, 3-10 cells thick. — Bays line, inconspicuous. 



T.S. — Eays uniform, in regular oblique series ; about 240 in 2-mm. field. 

 Total width in 2 mm. = 0-40 mm. Height = 0*15 mm. (0-01-0-19 mm.), 1-4-10 

 cells ; width = 0-01 ; 1-2-ply. Margin not differentiated, cells often with 

 transparent aggregated contents. Badial intercellular spaces at cell angles. 

 — Fibres non-septate, 1-6 between rays.— Cells of laminar parenchyma with 

 oblique or horizontal walls. 



U.S. — Laminar parenchyma 1-10 cells thick; terminal walls of cells 

 horizontal. — Bay-cells all similar. — Occasional septate fibres with series of 

 4-8 crystals. 



Note. — This African padouk is very similar to the sample of Andaman 

 padouk, Pterocarjms indicus, described later ; but the parenchymatous 

 laminae are thicker and more conspicuous, and seem often to contain the 

 vessels. Bouget (14) states that Coral wood or Bed wood is supplied by 

 Ptcrocarpus soyauxi Taub. Boulger (2) refers African padouk to P. erinaceus 

 Poir, and to P. angolensis. 



29. Trichilia emetica. 



No. 238 from Boyal Botanic Gardens, Kew, labelled " Trichilia emetica, 

 S. Trop. Africa." PI. XXXIV., figs. 76, 77, 78. 



Pale buff, slightly lustrous ; roey. Vessels indistinctly zoned, connected 

 tangentially by short, wavy bridges of parenchyma. Occasional dark, con- 

 tinuous layer of parenchyma. 



C.S. — Vessels slightly compressed tangentially, scattered or in groups, 

 mostly radial of 2-8, usually with tails of tracheids and fibres extending 

 radially from them. M. T. D. = 0'14 mm. 30-40 groups in 2-mm. field. — 

 Fibres with moderately thick walls, 2-6 between rays. — Circumvasal paren- 

 chyma distinct, 1-4 cells thick, extending obliquely tangentially to meet 

 circumvasal parenchyma of adjacent vessels. — Bays distinct ; contents trans- 

 parent. 



T.S.— Bays irregular in size and arrangement, about 150 in 2-mm. field. 

 Total width in 2 mm. = 0-60 mm. Height = 0-12- 0-30-0-64 mm. ; 5-30 cells. 

 Width = 0-01-0-05 mm. ; 1-, 2-ply. Margin indistinct ; cells usually with 

 parietal contents. — Wood parenchyma cells rectangular. 



E.S.— Wood parenchyma cells rectangular. — Fibres non-septate. 



