20 MK. D. OLIVEK OK ATJRA.KTIA.CEJ:. 



period when the species was able to migrate to the Archipelago 

 and Australia, physical conditions obtained which prevented its 

 extension to the tract now forming the "Western Peninsula ? 



Pabamignya. 



It is not improbable that further investigation may lead to the 

 nnion of this genus with Luvunga. Dr. Wight, in his observa- 

 tions on the distinctive features of Paramignya*, states it to be 

 removed from that genus by the symmetry of the carpels and 

 outer whorls, its usually pentamerous flowers, free filaments, and 

 especially by " the distinct endocarp of the fruit." With regard 

 to the number of carpels constitutiug the pistil, I find the only 

 species of Paramignya described by Dr. Wight to vary with 3, 4, 

 or 5. A second species (the Arthromischus of Mr. Thwaites) has 

 a trilocular or sometimes a quadrilocular ovary : the other true 

 Paramignyas are quinquelocular. On the other hand, Luvunga 

 scandens varies with 4 to 2 cells, thougb usually it is trilocular. 

 Again, the outer whorls of the flower in a Luvunga from Borneo 

 are pentamerous, the stamens are free, as they are also in L. eleu- 

 iherandra of Mr. Dalzell. I do not see any important difference 

 between the fruits of the two genera. These main points, then ? 

 of distinction between Paramignya and Luvunga fail, and the spe- 

 cies of Paramignya described by Hasskarl f, varying with 1, 2, or 

 3 leaflets, would seem to unite yet more intimately the always 

 unifoliolate Paramignya with the trifoliolate Luvungce. I have 

 not, however, seen this species, and until we possess further suites 

 of specimens from the Archipelago, the safer course is, I think, 

 notwithstanding their intimate relationship, to retain the genera 

 distinct. 



Mr. Thwaites proposed the genus Arthromischus in his ' Enum. 

 Plant. Zeylaniae,' P- 47. He considered it to differ from Para- 

 mignya in its jointed leaf-stalk, small calyx, and uni- ovulate 

 cells of the ovary. An articulation in the petiole I find, how- 

 ever, more or less distinctly in P. citrifolia and P. grandijlora ; 

 and P. monophyUa has sometimes, and P. grandijlora nearly always, 

 one ovule in each cell. 



The ovary in P. (Arthromischus) armatus is usually 3-locular, 

 and not, I think, 4-locular, as described in the ' Enumeratio.' I 

 am unable to find any sum of characters or single character at all 



* Hlust. Ind. Bot, i. 108. f Cat. Hort, Bogon. alter, p. 216. 



