MONOCOTYU: DUNES. 231
niembranacea, suba}(|uivalvis. Fcria/it/tii valcula inferior cariiiata apice bidentata v. biseta, dorso (supra niedium) aristata. Caryojms libera, exsulca, lateraliter compressa.
Gramiiia ccBspifosa ; vaf>;inis Jongitudinalitcr fissis. Pani- ciila sape coarcfala, aristis arcnato-pattdis.
Obs. A Dcscbainj)sia differt lociistis ancipitibus, glumis carinatis, periaiithii valvula iuferiore carinata apice attenuato bidentato v. biseto, caryopside lateraliter compressa. Ab Avenis ])lerisque glumis periauthiisque carinatis ; ab omnibus caryopside exsulca et lateribus compressis.
65. Trisetum SUBSPICATUM, Palis, agrost. p. 88. Trisetum airoides, Boem. et Seh. spt. 2, p. (SiQ>, exclus. syn. Wulfen et Host. Richardson in Franklin s journ. p. 731.
Aira spicata, Linn. sp. pi. ed. 2, p. 95, jt. lapp. n. 47. Flor. Dan. f. 228, mala. Gunn. norv. n. 422. WaJilenb. lapp. p. o3.
Aira subspicata.Zi/^//. si/st. nat.ed. 12, v. 2, p. 91. Willden. sp.pl. 1,P' 377. Pers. syn. \,p 77. Zoey.pl. island, in Olafs. reise 2, p. 234. Giesecke greenl. in Brewster s Edin. encyclop.
HIEROCHLOE.
Hierochloe Gmel. sib. 1, p. 100. Br. prodr. Jlor. nov. holl.p. 208. Trin. ayrost. p. 130.
Hierocliloa et Toresia, Palis, ayrost. p. 62 et 63.
Char. Gen. Gliima subaequivalvis,locustamtritioram [ccxciii sequans. Perianthia bivalvia, lateralia mascula, triandra; terminate hermaphroditum, diandrum.
Obs. Relationem veram Anthoxanthi ad Hierochloem, in prodr. flor. nov. lioll. p. 209, primum indicatam, optime conflrmat planta Javanica intermediie structural a D. llors- field detecta ; in hac enim periantliium lateraliam inferius masculum bivalve, superiiis univalve, neutrum : terminate liermaphroditum. llujus novi generis (Ataxia) habitus potius est Anthoxanthi, quocum etiani gluma ina^quivalvi quadrat.
Cum Hierochloe charactcribus nonnuihs convemt Arthro-
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