306 OlilOINAL ARTICLES. 



nitida presents a similar structure. In Btigmapliyllon margi- 

 natum, a climlting species, the accession of an irregular arrange- 

 ment of the ligneous mass is traced from young, herbaceous 

 branches, Avhich exhibit nearly the usual structiu-e. In older 

 stems the ligneous mass presents a sinuous outline, wdth pro- 

 jecting angles. It consists of dotted prosenchyma and elongated, 

 smooth, thick- walled fibroid cells, traversed by very wide-mouthed, 

 dotted vessels. The medullary rays, formed usually of a single 

 row of dotted cells, pass from the pith sometimes in straight 

 radial lines, sometimes interrupted and crossed by flexuous 

 and irregularly concentric processes of similar composition. 

 There are two distinct cortical layers, the outer suberous, marked 

 by several dark, concentric lines, the inner compact and paler. 

 Liber is absent, except from the oldest layers where scattered 

 fibres occm\ — Tetrapterys Ouilleminiana, p. 106 and fig. presents 

 a wood regularly lobed, with 8 sinuses which follow vertically 

 a spiral direction. Erom the pith, extending to each groove, is a 

 broad ray, distinguishable only from the rest of the wood by the 

 absence of large vessels. In old branches the regular contour of 

 the woody axis is lost. The wood consists of plain or slightly 

 dotted, thick-walled, ligneous fibres traversed by wide, dotted 

 vessels. The medullary rays are straight and continuous. Liber 

 occurs in large bundles in the bark. — Banisteria nir/rescens, p. 

 107 and fig. Different stages in the development of the stem 

 are described. In the older branches the continuity of the wood 

 is interrupted by several very deep projections of cortical tissue 

 advancing towards the pith, the principal lobes are less deeply 

 divided by similar processes. Vessels, small and few towards the 

 axis, are wide and numerous in the lobes. The bark consists of 

 a small number of layers each with its liber deposit, the fibrous 

 cells of which are described. In a stem of 7 centimetres diameter, 

 a cross section presents the appearance of several branches 

 twisted together ; one ligneous bundle is central, with pith and 

 medullary sheath ; the surrounding bimdles are destitute of 

 these, consisting of dotted vessels and prosenchyma. 



EETTnEOXYLE^. Martius. Beitrage z. Kenntniss d. Gattung, ^ri/- 

 throxylon. Abh. K. Bayer. Ak. iii. Abth. ii. (Ext.) IIolz. p. 12. 



Canellaceae. Miers, J. On the Winteraceae. Ann. Nat. Hist. 

 Ser. iii. 2, 34. Dotting of the vessels. 



DiPTEBOCAEPE.?;. Kortlials, P. W. Over eenige soorten van de 

 Familie der Dipterocarpeae. Temminck's Verhandel. 1839-42. 

 p. 49. 



Ztgophyllaceae.— GMff/cM;;?, &c. Lindley, J. Yeg. Kingdom, 479. 



SiMAEUBACEAE. AUmitlus. B. Mirbcl. Elemens de Phys. Veget. 

 tab. xiii. 1. 



AcERACEAE. — Acer. Schultz, C. II. Die Cyklose. Nova Acta, 1841. 

 xviii. vSuppl. ii. tab. xxiv. — Gfray, A. Introd. Botany (1858), 

 118-19. (with figs.)— A^e^?iwJo. Gray, A. Introd. Botany (1858), 

 121, (with ^g9,.)~Acer. Henfrey, A. Micr. Diet. ' Wood.' (and 



