156 J R I S T I D A. Botanique. 



5^ — 6 lineali, lincari-lanceolata , apice truncata I. oro»a, mfcriorc 

 ovato-ohlonga apice bidenti(;ulala et brevlssimo mucronata triplo 

 loni!,iore: flosculo ipiadrilineaU, glabro, maculato, apicc non torto, 

 scd cum stipitc arislac- deciduae 7 — 9 - 12 Itnealis contortac 

 articulatim ronjuncto: scta media patente li — 2 pollicari, late- 

 ralibus crectis lincis 1 — 3 — G longiore. 

 Arislida stipijormis Lamarck Illust. /1791) p. 157? Poir. Eneycl. suppl. 

 1. (1810) p. ^52. 



Chaetaria Lamarckii R.S. Syst. 2. (1817) p. 393. ) 



Aristdn Lamarckii Steudcl Nomencl. Ed. 1. (1825.) \ 

 ArlhralJierum comosum Gay! in Ilb. Kuntli. 



Senegalia (Dupuis cx Poir. Reichb. I) : in arenosis pr. Walo (Perrottet 

 in Hb. Kunthl); Nubia ad montem Cordofanuni Arasch-Gool passim. 

 Octobr. (Kotschy Un. itin. n. H2!) 



Radix fibrosa; fibrae crassae, densae, fasclculatae. Culmus 2 — 2^ pe- 

 dalis, crcctus I. obliquus, ramosus, versus nodos (3) eximie eomprcssus, 

 infernc purpurascens. Nodi valde tumidl, nigro-purpurascentcs, dupli- 

 ccs, lincas 2 a se invicem remotl et Intcrdum gemmam buILiformem, 

 ovato-globosam magnitudinis nucls Avellanac mlnorts foventes. Fagi- 

 nae Intcrnodils breviorcs, on^ adustae , loco ligulac barbato-lanatac : cilils 

 satls densls, sordidc albidis, lincas 2 longls. Folia fcre pedalia, sub- 

 convoluta, compressa ct In hoc statii lineam lata, glabra, laxiuscula. 

 Panicula junlor basi vaginata, dcbills, flacclda, ramls crectlusculls, spl- 

 culas angustissimas gcrcntibus, adulta diflormis. Stipes aristae aetate 

 senslm prolongatur; In spccimlnc Nubico pollicaris evasit, quod quidcm 

 rai*ius in Sencgalenslbus; in planta adulta plcrumquc panlcula arislis 

 onmibus dclapsis ccrnitur, (losculo intra glumas persistcntc. Ari.s.tac in 

 speciminc Poirctli 3 polllcares; cclcrum .specles noslra sinc dubio etiani 

 Polretlana, sed Aristida stipiformis Lamarckli a D. RoussILon In Sene- 



