Mr. J. Miers on the Tribe Colletie^e. 377 



flowers are more numerous, and are supported bv longer peduu- 

 des. Its capsule resembles that of CoUetia, bein<5: balt^imbedded 

 HI the simple cupular base of the calvx, while m Discaria it ap- 

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

 being somewhat longer, originating in the -rowth of the adnata 

 disk, and the protrusion of its free mar-in beyond the cup of the 

 calvx: on the contrary, in OchetophUa, the cupuliform support 

 IS thm and almost membranaceous, and the disk is not discer- 

 nible, owing to its not exceeding the len-th 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; tney are copiously furnished with leaves, which are 

 much larger and three-nerved. 



The typical species above mentioned is the Rhamnm Chacaya 

 ot 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 

 thacayes,'' from the vernacular name of the tree. In -eneral 

 appearance it resembles Xotophana foUosa, 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- 

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

 character of the genus is here remodelled as follows :— 



OcHETOPHiLA, Pop.— Char, emcml.— Calyx petaloideus, urceo- 

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

 intus carmatis, calloque sub apice signatis, reflexis, astiva- 

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

 laciniis calycinis requilonga, et cum staminibus in sinubus in- 

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

 tenuia, erecta, apice inflexa. Anthercn panula?, ovatre, 2-lob£e, 

 imo profunde cordate et divaricatae, apice dorsi affixje, lobis 

 singulatim 2-valvulatis, valva antica breviore et bine rima 

 hippocrepica hiantibus. Discus carnosus, late pateriformis, 

 calyci omnmo adnatus, marginc vix libero, integro vel sub- 

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

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

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

 catus, glaber. Stic/ma obtuse 3-lobum, lobis pauIo divaricatis. 

 Fructus globosus, NotophancE similis. Semen Colldice. 



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

 dibus Chileiisibus vigentes, foliatione et inflorescentia ut in No- 

 tophsena, scd stijmlis diversis. 



