Mr. J. Miers on the Tribe Colletiese. '371 



petalis vix breviora, et cum illis iritra lacinias inseita : fda- 

 menta brevissima, erecta; anthers reniformes, 2-loculares, 

 rima hippocrepica antice dehiscentes. Discus pateriformis, 

 carnosulus, margine libero, crenulato. Ovarium oblongum, 

 3~sulcatum, disco breviter immersum, 3-loculare; ovula iu 

 loculis solitaria, erecta ; stylus brevis ; stigma obtuse 3-lobum. 

 Fructus subglobosus, 3-sulcatus, in calycis cupulam valde 10- 

 costatam discoque aucto adnatam semi-immersus, epicarpio 

 crasso coriaceo persistente 3-valvato, endocarpio hinc sece- 

 dente, in coccis 3 elastice resilientibus, axin versus bivalvatim 

 dehiscentibus, singulis monospermis. Semen Colleti^e. 

 Suffrutices in Provinciis Argentinis pracipue vigentes, rarius in 

 Australasia, ramis valde patentibus, ramulis spinescentibus $ 

 folia parvula, breviter petiolata, spathulato -oblong a, infra spinas 

 orta, fasciculata, valde decidua : stipulaB minutce, 2-lob(Kj laciniis 

 subulatis : flores 2-3, fasciculati e turionibus spina brevioribus 

 cum foliis prodeuntes ; pedunculo l-floro, nutante. 



1. Discaria Americana, Hook. Bot, Misc. i. 156. tab. 44 D. Con- 

 dalia spinosa, Spr. Syst. Cur. post. iv. 108. Condalia mega- 

 potamica, Spr. Linn. xv. 473; intricatissime spinosa, ramis 

 tortuosis, ramulis compresso-teretibus, fere aphyllis, obsolete 

 rigide pilosulis, spinis decussatim oppositis, iterurnque spinu- 

 losis, striatis, subulatis, apice calloso-pungentibus ; foliis mi- 

 nimis, oppositis, rarius 2-3 infra singulas spinas enatis, ob- 

 . longis, obtusis, serratis, imo in petiolum brevem cuneatis, 

 reflexis, caducissimis : stipulis minimis, rudimentariis, rubris, 

 obsolete 2-dentatis intus pilosulis; floribus 2-3, fasciculatis, 

 nutantibus, e tuberculo sub spina stipula suifulto ortis; 

 calyce urceolato, limbo 5-fido, petalis 5, oblongis, concavis, 

 unguiculatis, staminibus 5 petalis paulo longioribus, et laci- 

 niis 3-plo brevioribus, erectis, filamentis brevibus, antheris 

 ovatis, ovario oblongo, 3-sulcato, glabro, stylo calycis dimidio 

 longitudinis, fructu 3-cocco, calycis cupula valde 10-sulcata 

 suffulto. Portozuelo Prov. CordovaB (mini lecta) ; in radicibus 

 montium Prov. San Luiz et Cordova (Gillies). 



1 cannot find in tbe Hookerian herbarium the typical plant 

 upon which Sir William Hooker founded this genus, nor any 

 other approaching its characters; it was probably a unique 

 specimen that remained in Gillies's own collection, which was 

 afterwards sold and dispersed. In one of my journeys over 

 the Pampas I found a plant in the same locality in which Gillies 

 met with his, so that I may safely consider mine as referable to 

 the same type, notwithstanding the want of flowers for its com- 

 plete identification : it is only in fruit. The floral character 

 given above is therefore derived from Sir Wm. Hooker's figure, 



25* 



