^io TRIANDRIA-DIGYNIA. 



radicalia csspitosa . Vagins etriats, glabrs. Stipula li- 

 neam dimicliam , aut lineam ad summum longa, acu- 

 ta , eroso-ciliata , in vaginse raargines decurrens . Ka- 

 cemus terminalis , longiusculus , laxiusculus, composi- 

 tus, subnutans, in anthesi erecto-patens . Rachis, et 

 rami tenues, striati, flexuosi , sursum villosuh . Kami 

 apice incrassati, alii simpHces, unilocustifen, ahi di- 

 visi , et pluribus locustis onusti , inferiores ut plun- 

 mum fasciculati , duo-quinque , insquales . Locusts 

 parva, sine aristis duas-tres lineas longs, bitlors, in- 

 nupta lanceolats , in anthesi divergentes , compresss , 

 ex stramineo-viridi albo-argentins, nitids, subinde cum 

 levissima purpurascentia . Valvs calycms insequales, 

 compresso-canaliculats, acuta , aut acuminats , maxi- 

 mam partem albo-membranaceaB , hyahnse , carina , et 

 marglne tenuissime ciUolato-scabrs ; exterior brevior, 

 et angustior, lanceolato-hnearis , uninervis , intenor 

 flosculum altlorem sine aristis subsquans, lanceolata , 

 trinervis, nervis laterahbus circiter ad medium evam- 

 dis . Stipitulus communis undique , et floscuh circa 

 basim albo-barbati , villo sericeo , molh , longmsculo , 

 nitido ; stipitulus iste plerumque producitur ultra tlo- 

 sculum superlorem , sed apice cassus . Valya corolhna 

 externa oblongo-lanceolata, compresso-canaliculata,bi- 

 fida, et biseta, obsoletissime quinquenervis , glabra , 

 nitida, pallide stramlnea, margine albo-membranacea , 

 supra medium, et paulo infra bifurcationem apicis sm 

 emittens aristam tenuem , scabridam , stramineo-albi- 

 dam, una vice cum dimidia, aut dua» vices, ut ipsa, 

 longam , infra geniculum contortam , arefactione plus 

 minus refractam . Valva interior glums extenon , setia 

 ejus non supputatis , longitudine squahs , apice acute 

 bidentata , nervo sub vitro minutissime scabndo utnn- 

 que ad marginem inflexum instructa . Anthers Jinea- 

 xes , longs , sspe purpurascentes . Variat culmo glabro. 

 Caryopsis oblongo-hnearis, hbera, glabernma , nitida , 

 pallida . , . 



13. AvENA gracilis : racemo abbreviato , ovato , subsim- 

 phci, locustis trifloris; calyce floscuHs breviore ; val- 

 va corollina externa a basi ad aristam mframedianam 

 villosa; foliis radlcahbus involuto-setaceis , culmoque 

 glabris ; radice fibrosa . ^ 



A. gracihs Moris. Stirp. Sard. elench. fasc i. pag. 5o. 

 Spreng.fil. Tent. p. 6. 



Ital. Fena a cespetto . 



