190 



W 



Asli Islaiul (Scott), Glcndon, MorcWs Bay et Wide Bay (Leich- 



hardt), Gracemere (0'Slianesy), Peak Downs (F. M.), Rocking- 



liam's Bay (Dullacliy), Lake Amadeus (Giles), Australia occi- 



deutali (Drummond, 398) et horcali-occidentali (Huglian). Eadix* 



fibrosa, perennis. Caules spitliamaei usque pluripedales. Ligula 



stipularis e ciliis ssepe perbrevibus. Latitudo foliorum nunc pla- 



Borum nunc convolutorum varia. Panicnla spiciformis, ex apice 



maturescens. SpicjB imciales v. breviores^ ssepe sessiles, modo 



dissite alternantes, modo confluentes, fere semper adpress^ v» 



parum patentes. Spicula; |-1^"' longa?, glaberrimge. Bractea 



quoqne exterior conspicue nervosa. Eaclieolae tenues, satis flcxuosse. 



Sej)alum floris stcrilis internum minus s^epe minimum nisi planc 



absens, interdum autem magnura. Occurrit varictas spicis omnibus 



ad spiculas solitarias alternantes tunc scepe rachilla setiforrai suf- 



fultas reductis, Hujus varietatis statum pumiliim paucipollicarem 



reperiunt cl. Bowraan ad Herberfs Creek, cl, Gosse in Australia 



subcentrali et cl. Drummond in Australia occidcntali (101). Status 



hujus speciei depauperatus habitu simulat P. marginatura, cujus 



autem folia breviora^ bractea infcrior haud valde ncrvosa ct fructus 



pubescens. 



Plantam typicam Linnei et Jacquini ex Australia orientali sub- 



tropica interiore prsecipue hahco, spiculismajoribus, flore exteriore 



staminigero et sepalum altcrum magnura produccnte, calyce fruc- 



tifero Isevi opaco, sed non raro rostellulato. P. gracile statum 



macrum repra;sentat apud nos frequentiorem, spiculis miuoribus, 



' sepalo floris exterioris interno minuto v. prorsus absentc, stami- 



nibus hujus raro evolutis, passim in staminodia minutissima mu- 



tatis, fructu eminenter rugato et nitente. Transitus autem ohser- 



vavi perpliKes. P. quadrifarium (Hochstett. in Ach. Rich. Fl. 



Abyss. ii. 367) et P, Lindenbergianum (Nees Gram. Afric. Austr. 



i. 47) fortasse varietatibus P. hrizoidis adnumerabis. P. fluitans 



(Retz. Ohs. iii.-8 ; P. obtusiforium, Delile Fiore d'Egypte, 6, t. 5 ; 



P. paspaloidesj Pers, Syn. i, 81 ; P. afiine, Nccs in Mart. Brasil. 



ii. 114 ; P. bechmanniforme, Mik. in Spreng, neue Entd. ii. 83 ; 



Digltaria appressa, Pers. Syn. i. 85 ; D. obtusifoUa, R. et S. Syst. 



Veg- ii. 889; D. aflfinis, R. et S. 1. c. ii. 470) distinguere noquco 



nisi caulc infcrne, quantum aqua^ immerso, e nodis vage radicante, 



racheolis vahle dilatatis nec non bractea cxteriore truncata ab- 



hreviata. P. Paractsenum (Kunth. Gram. i. 41 ; Paractaenum 



Novse HoIIandi^e, Beauv. Agrostogr, 47, t. x. fig. 6) statum depan- 



pcratmn P. brizoidis exhibere videtur. P. jnbiflorum (Trin. Diss. 



ii. 139) insufficienter descriptum forsan ad has formarura series 

 pertinet. 



Panicum marginatum (R. Br. Prodr. 190 ; Trin. Tcou. t. 208 ; 

 P. strictum, R. Br. Pr. 190 ; P, siuguhare, Steud. Glum. i. 60) ad 

 flumina GouIburn-etBroken-River, Tambo^ Macalliatcr- et Snowy 

 et Genoa River nec non ad montes Futter's Range prccsertim in 



