Mr. J. Miers on the Bignoniacese. 159 



contrary dissepiment, which becomes quite free from them, upon 

 the lateral margins of which the seeds are attached on both 

 faces, — a structure quite that of the Catalpece : there is therefore 

 an inconsistency in this small group, to which I will presently 

 refer. 4. Eccremocarpea, where the capsule, though bivalvular, 

 is unilocular, the seeds being affixed upon a prominent linear 

 placentation that runs along the middle of each valve. This 

 subtribe consists only of the genus Eccremocm'pus, but the 

 structure of its capsule and placentation differs in no way from 

 that of Jacaranda, which is placed in the Catalpea ; if there- 

 fore this subtribe be maintained, Jacaranda must be transferred 

 to it. 



In the first subtribe, the structure above defined, as regards 

 the capsule, is universal. In the Monostictides the dissepiment 

 is generally thin and coriaceous, but in the Pleiostictides it is 

 thick and almost ligneous, in both cases consisting of two par- 

 allel plates firmly conjoined together, and which frequently may 

 be separated : when the seeds fall away, we may observe upon it 

 the lines of cicatrices distinctly marked on both sides, near to 

 and parallel with the margins, thus indicating the points of at- 

 tachment and number of series of the seeds. In Amphilophium 

 Vautherii, for instance, these parallel plates easily come apart ; 

 the dissepiment is at the same time marked by a nervure along 

 its axis, showing where the carpels have been conjoined ; the 

 imbricated seeds are attached near the margins, in four parallel 

 rows (that is to say, sixteen series in all the four marginal sur- 

 faces), and the points of their attachment are marked by long 

 deep furrows, which, being close to one another and alternating, 

 give to the margin the appearance of being cancellated by a 

 lattice-work of coarsely reticulated open spaces. A similar ap- 

 pearance is seen in Pithecoctenium, where the margins of the 

 plates are severally turned up at a right angle, like the edge of 

 a tray, and this reflected portion is cancellated in the same 

 manner, showing there the points of attachment of the seeds. 



In most of the Eubignoniece, as in Adenocahjmna, Arrahidaa, 

 Amphilophium, Aneinopxsgma, Pithecoctenium, &c., the two valves 

 of the capsule, upon falling away, leave upon each side of the 

 dissepiment (which remains attached to the peduncle, though at 

 some distance from it) a concentric line of ligneous fibre, or 

 rcplum, like that seen in the fruit of the Capparidece, but which 

 cords do not remain attached to the placentae or seeds as in that 

 family. These replum-like cords, which, before the dehiscence of 

 the capsule, produce lateral ridges by intervening between the mar- 

 gins of the valves, remain attached at their base to the peduncle, 

 and often at their other extremity to the apex of the dissepiment. 

 In Cybistax, where the dehiscence is in the middle of the two faces. 



