135 



iuvolucro late eordato , aeuto , compJicato , extus pube- 

 I rnlo. 



Commelina ruhens Red. Species summopere affinis hinc 

 angustifotme Mich, inde communu Caulc erecto, rnbeuti, te- 

 retiueculo, pnbernlo, sursum patentim ramoso; foliis lanceo- 

 ' lato-acuminatis, hirsnfnlis, snperue retrorsum scabrls basi 



rubenti-maculata, contracta, attenaatis in raginam tandem 

 laxiusciilam ti conicam purparascenlem ptibernlam, marg^me 

 Mrsuto-ciliatam. (Pctala SQbiilacina.) 



Rheum tetragonopuii Mart Ao\\\s longe petiolatis sabtc*- 

 trag'onis ^ supra plauo - concaris , ntrintjae siilcatis , mar^iue 

 superiore obtasiusculo, lamina deltoideo-ovata, basi brerUer 

 cuaeata subcncnllata, nerris qainqiie lateralibus marginanli-^ 

 bus, ^nbtiis glabrls rel snbtiiiter pubentibns, summis el ilo- 

 ralibiis imis sossillbus; thyrsis laxiuscnlis; samaris^ ovato - 



elHptiels apice emarginaUs^ alis qaam corpus angustioribus^ 

 sepalis fructiferis oblaugo-oboratis, 



Rheum crassinervium Hort^ Vtndoh^ pettolis laminae 

 longUodine, sectione transversa sublunato-semiorbicularibua 

 snpra coucaviusculis, apicem versus medio concaviS) dorso 

 snIcatiS) faclebus snperioribus obtusisj lamina lato- et sub- 

 dehoideo-ovata, subcrispata;, basi cucullata breviter cuneata^ 

 neivis quinque aut septem crassisstmis^ lateralibus couiBaen^ 

 libns marginantibus et sulcatis, subtus pubescent! ^hirsntula; 

 foliis summis breviter petiolatis; thjrsis densifloris ; samaris 

 OTato-ellipticis, cordatis, apicc lato-emarginatis siibtrunca- 

 tis, aHs corpus sabaeqaantibus; sepalis fructiferis oborato- 

 eHiplicis. 



Kheum dentatum Mart, petiolis iongitadiae laminae, 

 teretiuscnlis snpra depresso-planis et antice leriter lato-ca- 



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nalicalatiSy faciebns superioribns obtusis^ subtus sulcatis^ la- 

 mina OT^a acata grosse dentata, re] angnlato-denlata^ basi 



