470 Mr. J. Miers on the genera Hyoscyamus and Physochlsena. 



minal raceme or panicle ; the calyx does not increase to half the 

 size, in proportion to that of Hyoscyamus, it is more reticulated, 

 of thinner and more membranaceous texture, and the teeth, 

 wanting the strong marginal nervures, are thin and blunted, and 

 generally inflexed, nearly closing the mouth of the tube ; the 

 operculum is also much smaller, quite flat and discoid, and less 

 bony in its substance. These different features are fully suffi- 

 cient to constitute a valid genus, which I propose to call Phy- 

 sochlana, a name more strictly in conformity with the usual 

 orthoepy than that of Don, being derived from (j>vaa, vesica, 

 'XXawooo, vestio, because of its capsule inclosed in a vesicular 

 calyx. I here annex its generic outline : — 



Physochl.ena. Physoclaina, G. Don. Belenia, Decne. — Calyx 

 cylindricus, ssepe medio subinflatus, 10-nervis, 5-dentatus, 

 persistens et augescens. Corolla campanulato-infundibuli- 

 formis, superne ventricosa, imo constricta et cylindrica, limbo 

 vix obliquo, subsequaliter 5-fido, lobis subacutis, haud paten- 

 tibus, sestivatione imbricata. Stamina 5, subsequalia, decli- 

 nata, ssepius exserta, in constrictionem corollse inserta, fila- 

 menta ortu pilosa, superne glabra, colorata ; anther® ovatse, 

 imo dorsi ad connectivum articulatim affixse, 2-loculares, locu- 

 lis adnatis, margine longitudinaliter dehiscentibus. Ovarium 

 conicum, disco carnoso annulari basi cinctum, glandula parva 

 apicali vix conspicua munitum, 2-loculare, ovulis plurimis, pla- 

 centis valde incrassatis, dissepimento utrinque adnatis. Stylus 

 incurvus, exsertus. Stigma subbilobo-capitatum. Capsula tur- 

 binata, membranacea, calyce reticulato inclusa, 2-locularis, 

 apice operculatim dehiscens, operculo parvo discoideo, cori- 

 aceo. Semina plurima, placentis crassis affixa, ovata, com- 

 pressa, reniformia, testa reticulato-favosa, hilo laterali. Em- 

 bryo teres, intra albumen subcarnosum hemicyclicus, radicula 

 incurvata, ad angulum basalem spectante, cotyledonibus semi- 

 teretibus sequilongis. — Herbse Gerontogece Orientates, radice 

 perennante, caulibus plurimis ; folia elliptica, alterna, Integra, 

 petiolata ; flores terminates, corymbosi, pedicellati ; corolla pur- 

 purascens, rarius sublutescens. 



1. Physochlcma physaloides. Physoclaina physaloides, G. Don, 

 Diet. iv. 470. Hyoscyamus physaloides, Linn. Amosn. Acad. 

 vii. tab. 6. fig. 1 ; Sims, Bot. Mag. tab. 852 ; Sweet, Br. Fl. 

 Gard. i. tab. 13 ; — radice tuberoso, caulibus plurimis erectis, 

 simplicibus ; foliis subcordato-ovatis, acutis, imo in petiolum 

 canaliculatum sequilongum attenuatis, utrinque glaberrimis, 

 margine ciliatis ; panicula terminali, pedicellis calycibusque 

 dense lanato-pilosis ; corolla omnino glabra, purpuiascente, 

 laciniis obtusis, albescentibus, genitalibus faucem vix exceden- 



