OF ARTS AND SCIENCES. 431 



minus pubescens ; foliis (e basi cordata ovato-lanceolatis) longius peti- 

 olatis ; floribus paullo majoribus ; sepalis ovato-lanceolatis acuminatis 

 (nee ovatis acutiusculis) ; corolla atra diametro sesquipollicari ; co- 

 rona patellar! 5-loba margine paruni denticulata pra;ter tubercula 5 

 crassa lieviuscula sat dissita quasi introHexa antheris opposita sub- 

 membranacea. — Rio Blanco, in ravines ; August. (334.) " Climb- 

 ing over large trees ; blooms black, with unpleasant smell." The 

 flowers in Coulter's specimens of G. pilosus are nearly as large as 

 those of the plant here characterized ; but they have the calyx and 

 the crown of Schaffner's n, 650, and of specimens from Guanajuato 

 collected by Duges. In all these the crown is dense, the whole sum- 

 mit of the lobes thickened and as it were muricately dentate by two or 

 more rows of teeth ; so that the two species must be quite distinct. 



GONOLOBUS (EuGONOLOBUs) sORORius, Gray, n. sp. E grege 

 typico, subglaber ; caulibus gracilibus bifariam retrorsumque pilosulis ; 

 foliis ovato-lanceolatis sinu lato subcordatis sesqui-bipoUicaribus peti- 

 ole gracili parum longioribus ; pedicellis in fascicule sessili vel brevis- 

 sime pedunculate perpaucis ; sepalis lato-lanceolatis herbaceis (lin. 2-3 

 longis) ; corolla cum andro3cio baud visa; ovariis 5-angulatis ; foUicu- 

 lis ovatis Ucvibus (3-pollicaribus), augulis subalatis. — Tequila, on 

 hillsides among bushes. (353.) The fruits of many Mexican species 

 are unknown, and the specimens of this want the corolla and androe- 

 cium. It may therefore belong to some of them ; but it is the only 

 known species, except the two typical ones of the Atlantic United 

 States, which has the pentangular follicles which gave name to the 

 genus. 



GoNOLOBUs (Chthamalia) NuaiMULARius, Hemsl. 1. c. 332. 

 Probably the plant of Nee, which is more likely to be of the western 

 or central parts of Mexico ; but the leaves (as in Gregg's 784 from 

 hills west of Morelia, in flower) are decidedly cordate and villous- 

 hirsute beneath, as also the stems. No flowers, but mature pods, were 

 collected. These are short-ovate and unarmed. Rio Blanco ; Sep- 

 tember. (565.) — " Talayote." 



Mellichampia* kubescexs, Gray, n. sp. Herba volubilis, glabra, 



* MELLICHAMPIA, nov gen. Asdepiadacearum, Roulinice sat aflSne. Calyx 

 alte 5-partitus, segmentis angustissime linearibus. Corolla in alabastro fusi- 

 formi-conica, aestivatione convoluta, per antliesin oblongo-campanulata, alte 

 5-fi(la, lobis lineari-loratis superne recurvatis. Corona simplex, ad juneturarn 

 coroUae et androecii sessilis inserta, tubulosa, scariosa, profunde 5-fida in lacinias 

 e basi ovata sensim caudato-attenuatas corolla paullo breviores. Antheras 

 corneae, quadrato-oblongEe, intus sagittatae, appendicibus scariosis ovatis termi- 



