Mr. J. Miers on the Bignouiaceae. 387 



the seed of which was not then known ; so that it is more than 

 probable that the two genera are identical. This opinion is 

 confirmed by some of the specific characters given in the ' Pro- 

 dromus/ — for instance, in the punctate hollows mentioned in 

 the axillary nodes of his P. foveolata, which exist in many spe- 

 cies of Adenocalymm, and which I have not observed in any 

 other genus. DeCandolle, however, describes the capsule as 

 being somewhat flatly compressed and smooth : the flattening of 

 the valves in the dried specimens may probably arise from their 

 warping in desiccation, as I have observed in those of Adeno- 

 calymna; and the tubercular rugosities, as described in my 

 plants, may be only a specific character ; but it is impossible to 

 determine these points without comparative examination. Ade- 

 nocalymna must be placed in the division Monostictides of De- 

 Candolle, not among the Pleiosiictides, where he arranged it, 

 The following is an emended diagnosis of the genus : — 



Adenocalymna, Mart. — Calyx tubuloso-campanulatus, coria- 

 ceus, ssepius 5-dentatus, rarius fissus, versus apicem glandulis 

 grossis disciformibus viridibus semi-imraersis instructus. 

 Corolla tubulosa, imo coarctata, hinc inde subcampanulata, 

 extus ssepius pulverulento-velutina, limbo 5-lobo, lobis sub- 

 sequalibus, rotund atis, quorum 3 erectioribus. Stamina 4, 

 didynama, inclusa, cum 5*^° sterili inter 2 breviora ; filamenta 

 filiformia, glabra, apice incurva ; anthera per paria conniventes, 

 singulse 2-loba3, lobis oblongis, apice affixis, scgregatis et 

 divaricatissimis, flexione filamentorum axi parallelis. Ovarium 

 oblongum, rugulosum, 2-loculare, pluriovulatum, disco pul- 

 vinato suifultum: stylus filiformis, glaber, longitudine sta- 

 minum : stiff ma bilamellatum. Capsula cylindrica, botuli- 

 formis, ssepe tuberculis elevatis poriferis subserialibus rugosa, 

 2-locularis, 2-valvis, valvis coriaceis dissepimento crasso par- 

 allelis, 7'eplo bipartibili utrinque subtenui a valvis solubili. 

 SemiJia plura, in utroque margine dissepimenti 1-seriata, 

 transversa, magna, crassa, aptera, crebre coarctata, vix imbri- 

 cata, compresse suborbicularia, dorso convexiuscula, ventre 

 subangulata, hilo pergrandi ovali versus basin notata : testa 

 dura, Crustacea, nitida, longitudinaliter 2-locularis, septo in- 

 tegro coriaceo foramine centrali pro radiculse receptione fe- 

 nestrato : integumentum internum conforme : embryo exalbumi- 

 nosus, testa configuratus, lobis cotyledonaribus 4, crassis, car- 

 nosis, plano-convexis, per paria adpressis et in locellis integu- 

 mentorum nidulantibus, radicula perparva, tereti, loborura 

 quarta parte longitudinis, centro inter eos prorsum adnata, et in 

 foramine septi recondita, oblique et horizontalitcr centrifuga. 



Frutices scandentes America meridionalis intertropical plerumque 



