Aristida. QRAMiNEiE 491 



basin triseta setis nudis ?el plumosis. Squamulse binae. Staniina tria. 

 Slyli 2 terminales breves, stigmata plumosa. Caryopsis oblongo-fusi- 

 formis glumellis inclusa macul^ hilari lineari elongata notata sed 

 libera. — Herbse perennes rarius annuse. 



Sect. I. CHiETARIA. — Arista persistensa basi triseta setis nudis, 



1. A. cserulescens (Desf. All I, p. i09, tab. 21) perennis 

 ssepius ccspitosa, radice tlbrosa, culmis erectis gracilibus inferne 

 interdum ramosis, foliis anguste linearibus convolulis vel canalicula- 

 tis margine s^^abridis, ligula brevissima truncata lacera, panicula 

 coarctata laxitlora elongata subsecunda basi ssspe interrupta ramis 

 1-2-nis brevibus striclis.glumis anguste lineari-subulatis subinsequa- 

 libus, glumella slipite glabro suffulta glumis subbreviore lineari- 

 convolula vix scabra, aristis in apice glumellae sessilibus divergen- 

 tibus capillaribus complanalis scibriusculis media sublongiore ^. A. 

 depressaReiz Obs. 4, p. 22. — A. Canariensis WiM. Enum. p. 99. — 

 A. gigantea L. fil. Suppl. p. 113. — A. Arabica Trin. et Rupr. loc: 

 cit. p. 135. 



Hab. in siccis, rupestribug, regionls inferioris partium australiorum 

 ditionis, Gilicia Trachea prope Anamur (Peronin I), Syria littoralis in arenosis 

 ad Berythum (Ehr. Gaill!), Palestina calidior ad Jericho (Ball!), Arabia 

 Petrea in rupeslribus montis Sinai (Schimp. 368!), Egyplus in Oasibus (Aschl 

 Rohlf !) et in littore Arabico ad Ras Benass (Schw!), Persia australis ad 

 Schiras (Ky 30G!) et Kolel Kumaredj (Hausskl), regno Mascate Arabise 

 (Auch. 5446 !), AfrghaniA (Griff I). 



Ex variorum opinione ab A. Adscensionis L. specifice non diversa, sed haec 

 cujus specimen ex iusuia Adscensionis a cl. d'Urville lectum c(jntuli differt i an 

 specifice?) aristis brevioribus glumellaque non tautum scabra sed margine 

 pectinatim ciliolata. Planta insularam Capitis viridis hHc quoque spectat. 



Ar. Geogr. Hi^-pania australis, Sicilia, Africa borealis, Madera, Insulse Ca- 

 narienses, Nubia, Abyssinia, Senegalia, P. B. Spei, India orientalis, Nova 

 Hollandia 



2. A. pumila (Decaisne Ann. Sc. Nat. Ser. H, 85^ annua ? 

 culmis e radice fibrosa pluribus nanis ascendentibus geniculatis 

 ramosis, foliis anguste linearibus canaliculatis vel convolulis, ligula 

 brevissima truncata lacera, panicula conferta ramis brevibus strictis, 

 glumis anguste lineari-subulatis infequalibus, glumella glumis lon- 

 giore stipite piloso sulTuIta lineari-convoluta subscabra, aristis in 

 apice glumellae sessilibus capillaribus complanatis divergentibus sub- 

 aequalibus scabris O. A. ccerutescens var. pimiila Trin. loc. cit. p. 136. 



Hab. in Syrise littoralia valle Barghontie prope Sidonem (BII), ad Nahr el 

 Kelb prope Berythem (Barb!\ in Arabire petreae Ouadi Scheick (Boiss!) et 

 ad radices Sinai (Auch. 2993 !), in Egypto Arabiae petrese conterminil (Bove ! 

 (Schweint!), inter Kahiram et Suez (Ehr.). 



Videtur a formis A. c cerulescentis culmis Vi-2-pollicaribus, gluniis valde 



