148 J R I S T I D A. Botcntque. 



erccti» et cclunus aoqualibiis flosculo breviorihus. An fornia A. vcstitae 

 panicula angustiorc? — scd glumac ilcruni acquales dicunlur. 



1 63. Jrislido rii^esccns Rocni. ct Scluilt. Syst. 2. (1817) p. 400. Paniculae 

 palniaris ct longioris, oblongaCj subcontractac, c vagina vix exser- 

 tae radiis subbijloris, comprcssis, angulis oppositis scabris: glumi» 

 v.ilde inaequalibus, comprcssis, flosculum arcte includcntibus, ca- 

 rinatis, apice in setam sesquilincalcm terminatis: glTinia interiore 

 dimidio breviore; arista tripartita, rccta, infra divisuram in glu- 

 mis latitante; setis ercctij: nicdia bipollicari lateralLbus pollicc di- 

 midio longiori. (I)iagn. sec. Rotli.) 



Aristida rigida Ilcync ct Rotb (non Cavan.) ex II. S. 1817. Roth 

 Nov. plant. spec (1820) p. V2 



Arthrnthentm rigiduni Scbult. Mantiss. 2. (1824-) p. 212. 

 India oricnlalis. (Ilcyne cx Rotli.) 



"Culnius bipcdalis, adsccndens, llcxuosus, tcres, glabcr, crassitie cul- 

 nii secalini, ai"ticulatus (nodis glabris), ramosus, ad ramos valdc incras- 

 satus; raini alterni et oppositi, erccti, rigidi. Faginue internodiis paullo 

 brcvioi'es, glabrae, margine membranaccac , ad oras barba dcnsa pilo- 

 rum tinctac. Folia erccto-putentia, rigida, subulata, convoluto-subtcre- 

 tia, striato-angulosa, glabra, margiue argute scrrulata, vaginis multu 

 longiora. Glumae lincari-lanccolatae, costa dorsali aspcrac. F/osculus 

 basi pilis brcvissiiuis adprcssis, lincains, ai'ista triparlita lcrniinatus in- 

 fra divisuram gluniis brcviore. Proxime accedit ad A. stipoidcin R.Br. ; 

 at in A. stipoide folia brcviora, minus rigida minusquc coiivoluta, su- 

 pra pilis longis adspcrsa ; vaginarum bai-ba longior, rarior ; panicula 

 simplicior ct glumac subaequales, longius subulatac; arista porro infra 

 divisuram gluniis dimidio longior et torta: setis patulis, subaequalibus, 

 fere 3 pollicaribus. » Rotli. 



