2.26

CHLORIS MELVIELIANA.

PLEUROPOGON.

Char. Gen. Locustis multi florae, cylindraceae. Glumaabbreviata, insequivalvis, mutica. Perianthii valvula in-ferior mutica, obtusa, concava, nervosa, apice scarioso:superior nervo utroque lateraliter biseto ! Lodicuhe distinct®.Styli 2. Stigmata plumosa. Caryopsis libera, lateribascompressis.

Gramen elegans. Folia plana, angusta , vagina Integra,ipso apice tantum fisso. Racemus simplex, locustis cernuis,purpureis, nitentibus. Gluma valvula inferiore acuta,superiore latiore obtusa. Perianthia ilistincta, valvula in-feriore b-7-nervi, superiore lanceolata emarginata, parisuperiore set a rutn brevissimo.

Obs. Genus Glycerias proximum, quaculu locustis tereti-bus, perianthiis obtusissimis et vaginis foliorum integrisconvenit; differt prsesertim setis lateralibus nervorum val-vulae superioris perianthii, lodiculis distinctis, stigmatibushaud decompositis, carvopside lateraliter oompressa et in-florescentia.

Character fere essentialis in nervis valvulsc superiorisperianthii latere setigeris; analoga structura enim vix,quantum scio, in ullo alio gramme obtinet nisi in Uniolalatifolia Mich, am,., ubi equidem nullis aliis differentiis comi-tata pro charactere specitico tantum habenda.

62. PLEUROPOGON SABINII.

Desc. Gramen 3-unciale usque spithameum, glabrum.Culmi erecti, foliati, striati, laeves, sitnplices. Folia radicaliaangustiora, longiora ; culmea linearia, plana, brevia, lsevia •.vaginae paulo compressse, striata;, glabrae, laeves, fere adapicem integne, ipso apice fisso, marginibus scariosis, su-prema folio proprio longior: ligula brevissirna, rotundata,emarginata. Spica racemosa, simplicissima, rachi striato-angulata, lsevi, viridi, pedunculis lateralibus glumam vix