BOTANY OF TERRA AUSTRALIS. 3^ 



CELASTRIN^.^ This order compreliends the greater 

 part of the first two sections of the Rhamni of Jussieu ; 

 it is obviously different from the more limited order of 

 Rhamnese, which I have already attempted to define, and 

 in many respects so nearly approaches to the Hippocra- [555 

 ticecB of Jussieu,^ that it may be doubted whether they 

 ought not to be united. 



In New Holland the Celastrinse are not numerous, nor 

 do they form any part of its characteristic vegetation; 

 their distribution is somewhat different from that of 

 Rhamnese, for they are found either in the principal pa- 

 rallel, or within the tropic. 



STACKHOUSEiE.^ Stackhousia of Dr. Smith,* and an 

 unpublished genus, exactly agreeing with it in flower, but 

 remarkably different in fruit, form a small tribe of plants, 

 sufficiently distinct from all the natural orders hitherto 

 established. I have placed it between Celastrinse and 

 Euphorbiacese ; to both of which, but especially to the 

 former, it seems to be related in a certain degree. 



The Stackhousese are peculiar to Terra Australis, and 

 though found chiefly in its principal parallel, extend more 

 sparingly both to the southern extremity of Van Diemen's 

 Island, and to the North coast of New Holland. 



' CELiSTRiN^. Cali/x 4-5-partitus, sestivatione imbricata. Fetala 4-5. 

 Stamina totidem, cum petalis alternantia, insertioiie ambigue perigyna. Ovarium 

 liberum, 3-4-loouiare loculis l-polyspermis, ovulis ereotis (rarb pendulis) : 

 Stylus 1-4. Pericarpium capsulare, vel clausum (Bacoatum, Drupaceum vel 

 alatum.) Semina in oapsularibus arillata. Emhri/o fere longitudine albuminis 

 carnosi, axilis. . 



Prutices vel Arbores. Folia simpUcia {rarb compositu) alterna vel opposiia, 

 stipulata stipulis sapius minutis, quandoque nullis. 



^ Annales du mus. 18, p. 4-86. 



3 SiACKHOUSEiB. Calyx 1-ph. 5-fldus, sequalis : tubo ventricoso. Peiala 5, 

 jequalia, summo tubo calycis inserta : unguibus ooLserentibus in tubum oalyoe 

 longiorem ; laminis angustis stellato-patulis. Stamina 5, distincta, inaequalia 

 (duo alterna breviora), fauci calycis inserta. Ovarium liberum, 3-5-lobum, 

 lobis discretis monospermis, ovulis erectis : Stijli 3-5, nunc basi colijsrentes : 

 Stigmata indivisa. Pericarpium 3-5-coccum, coccis evalvibus, apteris v. alatis ; 

 colurana centrali persistenti. Embryo ereotus axilis, longitudine fere albuminis 



carnosi. . , ci- 1 



Herbee. Polia simplicia, integernma, sparsa, quandoque mimta : btipulE? 



laterales ninutissimce. Spica terminalis ; jlorihus tribracteatis. 

 ■• Jjim- sac. transact. 4, ^. 218. 



