Mr. J. Miers on the Tribe Colletiese. 377 



flowers are more numerous, and are supported by longer pedun- 

 cles. Its capsule resembles that of Colletia, being half-imbedded 

 in the simple cupular base of the calyx, while in Discaria it ap- 

 pears to be surrounded by two thickened cups, the inner one 

 being somewhat longer, originating in the growth of the adnate 

 disk, and the protrusion of its free margin beyond the cup of the 

 calyx : on the contrary, in Ochetophila, the cupuliform support 

 is thin and almost membranaceous, and the disk is not discer- 

 nible, owing to its not exceeding the length of the cup of the 

 calyx. All the species differ in their habit from Discaria ; they 

 often form good-sized trees, and their branches are rarely fur- 

 nished with spines, although their extremity is generally sharp- 

 pointed; they are copiously furnished with leaves, which are 

 much larger and three-nerved. 



The typical species above mentioned is the Rhamnus Chacaya 

 of Dombey, erroneously stated to have been brought from Peru ; 

 it grows abundantly near the margins of streams in the elevated 

 valleys of the Andes, and these localities are hence called " los 

 Chacayes," from the vernacular name of the tree. In general 

 appearance it resembles Notophtena foliosa, and the two are 

 commonly confounded in herbaria ; but the absence of petals in 

 the latter genus constitutes an essential difference. Its generic 

 name is evidently derived from the circumstance that its species 

 are usually found near running streams ; those of Discaria pre- 

 fer, on the contrary, dry, saline, and sandy situations. The 

 character of the genus is here remodelled as follows : 



OCHETOPHILA, Pop. Char, emend. Calyx petaloideus, urceo- 

 lato-campanulatus, usque ad medium 4-5-fidus, laciniis acutis, 

 intus carinatis, calloque sub apice signatis, reflexis, sestiva- 

 tione valvatis. Petala 4-5, oblonga, cucullata, irno attenuata, 

 laciniis calycinis sequilonga, et cum staminibus in sinubus in- 

 serta. Stamina 4-5, petalis recondita; filamenta subulata, 

 tenuia, erecta, apice inflexa. Anthera parvula3, ovatse, 2-lobse, 

 imo profunde cordatse et divaricatse, apice dorsi affixse, lobis 

 singulatim 2-valvulatis, valva antica breviore et hinc rima 

 hippocrepica hiantibus. Discus carnosus, late pateriformis, 

 calyci omnino adnatus, margine vix libero, integro vel sub- 

 crenato. Ovarium depresso-globosum, 3-sulcatum, liberum, 

 medio disci insitum, et eo vix immersum, 3-loculare ; ovula in 

 loculis solitaria, erecta. Stylus calyce dimidio brevior, 3-sul- 

 catus, glaber. Stigma obtuse 3-lobum, lobis paulo divaricatis. 

 Fructus globosus, Notopharue similis. Semen Colletia. 



Frutices arborescentes et erecti vel demissi et decumbentes, in An- 

 dibus Chilensibus vigentes, foliatione et inflorescentia ut in No- 

 topha3na, sed stipulis diversis. 



