135 



iovolucro lale cordato , acuta , complicato , exlus pube- 

 riilo. 



Commelina rubens Red. Species summopere al'üuis hiuc 

 angiistifoliae Mich, iude communi. Caule ereclo, rubeiiti, te- 

 retiusciilo, pubenilo, siirsum patentim ramoso ; foiiis lanceo- 

 lato-acumiuatis, hirsntiilis, supcrue retrorsum scabrls basi 

 rubeuti-raaciilata, coutracta, atteniiatis iu vagiuam tandem 

 laxiusciilam et conicam purpiirasceutem puberulam, margiue 

 hirsuto-ciliatam. (Petala sublilaciua.) 



Rheutn tetragonopua Mart, foiiis louge petiolatis subte- 

 tragonis, snpra piano -coiicavis, utrinque sulcatis, margiiie 

 siiperiore oblusiiisciilo, laraiua deltoideo-ovata, basi breviter 

 ciineata siibciicnllata, nervis qniuque lateralibns raarginanti- 

 biis, snbtiis glabris vel subtiliter pubeutibus, sumrais et flo- 

 ralibiis imis sessillbus ; thyrsis laxiusculis; samaris OTato- 

 ellipticis apice cniargiuatis, alis quam corpus aDgustioribus, 

 sepalis frnctifcris oblougo-obovatis. 



RJieum crassinervium Hort. Vindob. petiolis laininae 

 longitudinc, sectioue transversa sublunato-semiorbicularibus 

 supra coiicaviusculis, apiceni versus mcdio concavis, dorso 

 sulcatis, facieJMS superioribus obtnsis; lamiiia lato- et sub- 

 deltoideo-ovata, siibcrispata, basi cuculiata breviter cuneata, 

 nervis qiiiuque aut Septem crassissirais, lateralibns conflneu- 

 libus marginantibns et sulcatis, subtus pubcsccnti-birsutula; 

 foiiis sumniis breviter petiolatis; thyrsis dejisifloris ; samaris 

 ovato -elMpticis, cordatis, apice lato-emarginatis snbtrnnca- 

 tis, alis corpus subaequantibus; sepalis frnctifcris obovato- 

 eliipticis. 



Rhcum denfafum Mart. petiolis longitudine laminae, 

 teretinscnlis snpra deprcsso-planis et antice leviter lato-ca- 

 naliculatis, faciebus superioribus obtnsis, subtus sulcatis, la- 

 mina ovata acuta grosse dentala, vel angulato-dentata, basi 



