61 Mil. BENTHAM ON LOGANIACE^l. 



as sections, under names given by Don or by Endlicher ; but a 

 few only of his species have been hitherto accurately identified, 

 our herbaria not generally possessing authentic specimens. As I 

 have now had an opportunity of seeing nearly the whole of them 

 in the Banksian herbarium, I subjoin a few notes derived from a 

 cursory inspection of the original specimens, and a more detailed 

 examination of such as are contained in the herbaria at Kew. 



Brown's fourth division (Plecocalyx, Don) is limited to the 

 single M. ambigua, a small slender plant with the habit of some 

 other annual Mitrasacmes, but the four small lobes of the calyx 

 are somewhat dilated and concave. The corolla is very small with 

 a slender tube. The second division (Dichelocalyx, Don) has only 

 two dilated and concave lobes to the calyx, which has a truncate 

 or two-horned aspect; the two other lobes are usually entirely 

 abortive, although in some luxuriant specimens of M. paradoxa I 

 have seen very minute traces of them. This section consists now of 

 two or three species ; the original M.paradoxa, Br., which includes 

 M. divergens, Hook. til. ; the M. distyla, F. Miill., a minute species 

 remarkable for its styles entirely free ; and M. nuda, Nees ab E., 

 closely allied to M. paradoxa, but which, from the specimens of 

 Preiss's which I have seen, I cannot venture to unite with that 

 species. 



Brown's third division {ILologyne, Don) is distinguished by the 

 style not split at the base till after flowering. This is not an easy 

 character to ascertain, for the separation takes place very soon 

 after fecundation, and I have sometimes opened several flowers 

 before finding one in which the styles appeared perfectly joined. 

 Brown's M. connata, the only species he refers to the division, is 

 in other respects so closely allied to M. elata, and the M. nudi- 

 caulis to M. pygmcea, that I have no hesitation in proposing that 

 the first and third divisions be united into one section under 

 Endlicher's name Mitragyne-, the more so, as the two Indian species 

 with styles connate from the base have the stigma decidedly two- 

 lobed, not entire as in M. connata. 



Of the sixteen species referred by Brown to his first section, we 

 easily recognize in our herbaria the M. elata, remarkable for its 

 long corolla ; as in M. connata, the tube varies from 4 to 6 lines in 

 length. M. stellata appears to vary in its leaves ovate-oblong or 

 linear-lanceolate, smooth or hairy, but to be always known by its 

 dense umbels of small flowers, either solitary or several together 

 forming a compound umbel at the end of along bare erect peduncle. 

 M. pilosa, Labill., agrees with M. serpyllifolia, Br., the since 



