112 Mr. J. Miers on the Bignoniacese. 



the other rounded and emarginated, while the extremities are 

 broadly expanded into a rather thin but opake wing, which is 

 considerably narrower than the disk ; the hilum, instead of being- 

 broad, is very narrow, linear, and marginal, corresponding with 

 the cicatrices seen along the margins of the dissepiment. This 

 appears to conform with the brief description by DeCandolle of 

 his genus Pachyptera, no specimen of which I have seen. The 

 internal structure of the seed is somewhat different, though ap- 

 proaching that I have given of Adenocalymna (vol. vii. pp. 156, 

 387) : the discoid portion, although coriaceous, is not nearly so 

 thick as in that genus ; its internal space is rendered 2-celled 

 by a very narrow septum, which extends from the hilum to the 

 opposite emarginature of the disk; this septum is fenestrated in 

 the middle (or, rather, interrupted) by a linear aperture for the 

 reception of the radicle; the two cotyledons are compressed, 

 each being divided by deep emarginatures at the apex and base 

 extending to the radicle, which thus occupies a central position, 

 united to the four cotyledonary lobes, the former filling the 

 fenestrated space, the latter occupying the two cells of the disk 

 formed by the narrow septum, as in Adenocalymna. The em- 

 bryo is enveloped by a delicate inner integument, similar to it 

 in form. 



In one of my excursions near Tejuco, in a deep forest, I found 

 the ground strewed with seeds of a similar shape and structure, 

 which I still preserve : the plant from which they fell was at too 

 great an elevation to be reached, and I could not find any re- 

 mains of the capsules. These seeds evidently belong to a different 

 species of the same genus, and are much larger, though resem- 

 bling the former in every other respect, the discoid portion being 

 7 or 8 lines in diameter, the wing 5 lines broad, the total extent 

 (including the wings) measuring 2 inches. 



The plant in question hardly appears to be a true Adeno- 

 calymna, and I place it there with some hesitation. Pachyptera, 

 in the absence of all knowledge of its floral structure, is still a 

 doubtful genus ; but its seminal characters seem to agree with 

 this species. Will Pachyptera prove to be a subgenus or section 

 of Adenocalymna ? This appears probable, because the two spe- 

 cies, foveolata and umbelliformis, which are associated with the 

 type, puberula, have the many-foveolated punctures about the 

 axils of the branches, which are almost peculiar to Adenocalymna 

 and Haplolophium. The P. dasyantha, DC, which I have seen, 

 belongs to the latter genus ; while the two remaining species, 

 striata and Perrottetii, appear foreign to the group. 



Adenocalymna ? caesium, n. sp. ; — ramulis teretibus, striatis, 

 pallide glaucis, pilis articulatis dense velutinis, demum sub- 



