Linnaan Society. 29S 



e two faces of the dissepiment, and the fruit forming a small oval 

 ! upe, containing a single osseous indeiiiscent nut, which is 1-celled 

 l>y abortion, and contains only a single pendulous seed entirely filling 

 its cavity, and consequently quite apterous, oval, with a small thick 

 superior radicle and two plano-convex fleshy cotyledons. This was 

 discovered by Mr. Miers on the skirts of the eastern declivity of the 

 Andes, near Mendoza, on the margin of the desert tract called 

 " La Travesia," where it was also found by Dr. Gillies. Its cha- 

 racters are as follows : — 



OxYCLADUs, Miers. 



Char. Gen. Ca/7/a; gamophyllus, 5-dentatus, persistens. Corolla gamo- 

 petala; tiibo cjlindrico, calyce 2-3-plove longiore, vix gibbo; limbo 

 brevi, .5-lobo, subbilabiato, lobis rotnudatis; labio iiiferiore 3-lobo, lobis 

 paululo majoribus, superioi-e bilobo, in tsstivatione imbricativa semper 

 exteriori. Stamina 5, corolloe lobis alterna, quorum 4 didynama, 

 qiiinta superior brevissima ananthera; 2 inferioribus longioribus faucem 

 attingentibus, 2 lateralibus iUis tertio brevioribus ; filamenta paulld 

 supra basin tubi iriserta, filiformia, glabra ; antherai rotundatae, reni- 

 formes, cordatae, 2-loba3, coimectivo dorsali cordiformi adnata? et buic 

 in mfidio loborum anticifixae, lobis ovalibus divaricatis antice lon- 

 gitudinaliter dehiscentibus. Ovarium obloiigum, pilosum, gjandnla 

 aniiulari brevi .5-loba glabra cinctum, 2 locuhire ; ovidls in quoque 

 loculo circiter f!, superne per paria coliateralia, e dissepimenti nervo 

 longituilinali seriatim appensa. Fructus subbaccatus, calyce immutato 

 clausus. Nux ovata, acuta, 4-sulcata, apice 4denticulata, l-locu- 

 lavis, l-spei'ma. Semen loculo conforrne, latere superiori funiculo 

 brevi appensum ; testa cliartacea, favoso-reticulata ; endopleura mem- 

 branacua. Embryo exalbuminosus ; radieuld superiori, crassa, apice 

 niainillteformi ; cotyledonibus ilia triple longioribus, ovatis, plano-con- 

 vexis, valde crassis. — Arbu^cula Mendozensis, vix non aphylla, spinosa, 

 ramosissima, ylaberrima ; raiais nitidis, crectis ; floribus ^awm, aggre- 

 gatis, parviusculis ; corolla ccerulescente. 



OxYCLADUS APHYI.LUS (v. V.). 



Hub. prope Mendoza, ad pedem Orientalem Andium Chilensium. 

 I'^ernac. Ala. 



For the reception of this curious genus, Mr. Miers has found it 

 necessary to constitute a new tribe of the Order to which it belongs, 

 'uch he subdivides as follows : — 



BiGNONIACE/E. 



Vrib. 1. BiGNONiE^. Capsula dehiscens, 2-locularis, 2-valvis ; seminibus 

 numerosis alatis coinpressis, dissepimento utrinque affixis. Embryo 

 cotyledonibus complanatis foliaceis. 



^rib. 2. CREscENTiEvt;. Fructus drupaceus, lignosus, 2- vel plurilocu- 

 laris; seminibus nimierosis alatis v. compressis. Embryo cotyledoni- 

 bus compressis carnosis. 



pn6. 3. OxYCLADETE. Fructus drupaceus, nucem unlearn l-loculareni 

 indehiscentem includens; semine solitavio suspenso rotundato. Em- 

 bryo radiculk superiore ; cotyledonibus magnis fere hemispbaericis car- 

 nosis. 



Figures of both genera with detailed dissections accompanied the 

 paper. 



