542 



A CONTRIBUTION TO THE KNOWLEDGE OF 



somewhat elongate, almost as wide as the ribs, their lower half tumified, so as to give 

 the appearance of grooves running across at an angle of about 60° to the stem ; the space 

 between the scars about half their length, closely chased with numerous transverse, very 

 fine striae ; vascular scars, 3, the central a dot, the lateral linear. 



When decorticated the vascular scars are represented by a large dot-like impression. 



S. cymatoides, Wood. Proc. A. N. S., vol. xii, I860, p. 520. 



S. Brakdii, Brongt. 



Syn. S. Menardii, Brongt. There can be no doubt that these two forms are merely 

 different parts of the same plant. I have frequently observed specimens demonstrating 

 this by having on different portions of their surface cicatrices presenting all the characters 

 of the two forms ; Prof. Lesquereux informs me he has also seen such. 



Sub-genus Asolanus. Wood. 



S. CAMi'TOTiENiA, Wood. Surface very closely and distinctly striate; stria; diverging 

 from the leaf-scars, so arranged as to form two sets of columns, the individual stria; in 

 each of which are parallel to the others of the same column, and at right angles to those 

 of the neighboring columns. The striae of one set appear much more pronounced 

 than those of the other, owing to their opposite directions . causing the light to fall on 

 them differently. The leaf-scars arc oval, sunken, transverse, with a more or less marked 

 an<de at their top. The vascular scar is a central dot, with apparently two lateral linear 

 dots, which latter arc obsolete on my specimens. 



Asolanus camptotamia, Wood. Proc. A. N. S., vol. xii, 1860, p. 238. 



S. ornithicnoides, Wood, Proc. A. N. S., vol. xii, p. 238, appears to be a good species. 

 The figure (pi. 4, Fig. 6, Proc. A. N. S.), is characteristic. 



Syringodendron, Siemb. 



S. BiSTRiATUM, Wood. Stem without ribs ; bark thin ; surface striate with coarse flexu- 

 ous stria; and numerous similar finer ones ; scars small, linear oval, disposed in pairs about 

 eight lines apart. 



The difference between the stria; is much more marked in the decorticated surface, as 

 the large ones are on it much more pronounced than on the bark. This plant evidently bears 

 the same relation to the ordinary Syringodendra that Sigillarise of the sub-genus Asolanus 



