MON'OC'OTYI,EDONES. 223 



06s. Ill exemplaribus plerisque nullum certe rudimentum 

 flosculi secundi, quod tamen in nonnullis a Melville Island 

 atque in exemplari a Possession Bay adest, setuliforme, 

 hispidulum ; et in specimine unico h. Melville Island locustas 

 nonnullas bifloras flosculo secmido pedicellato perfecto 

 observavi. 



57. PoA ANGUSTA.TA, panicula simplici coarctata lineari- 

 lanceolata, locustis 4-5-floris, gluma inferiore dimidio minore, 

 perianthiis apice erosis : valvula inferiore basi elanata lateri- 

 bus glabriusculis, foliis angusto-linearibus. 



Desc. Gramen 4-6-unciale, glabrum, erectum ; radice 

 fibro^sa. Culmi foliati, basi quandoque divisi, Iseves. Folia 

 angusto-lineariaj plana, acuta, glabra, Isevia ; vaginm subcy- 

 lindraceae, laeves, suprema folio proprio longior, onines ipsa 

 basi integra ; ligula subquadrata tarn lata quam longa, apice 

 dentate dente medio paulo longiore. Panicula erecta, 

 angustata, circumscriptione lineari-lanceolata, ramis pauci- 

 floris, pedicellis denticulatis, strictis, viridibus, apice paulo 

 dilatato, cum locusta hand omnino continue. Locmfm 

 oblongse, coloratse, ssepius quadriflorse. Glumm hyalinas, 

 glaberrimse, uninervise, cum pedicellis persistentes, valvula 

 inferiore fere dimidio minore ; superiore duplo latiore et 

 fere duplo longiore, obtusiore, perianthio dimidio circiter 

 breviore, nervis lateralibus obsoletis. Ferianthia separatim 

 decidentia, rachi locustae glabra ; valvula inferior oblonga, 

 concava, acutiuscula, apice scarioso eroso-denticulato, quin- 

 quenervis, lateribus infra medium pube rara in nervis extimis 

 crebriore instructis, ipsa basi absque lana implexa ; superior 

 paulo brevior, dinervis, nervis viridibus, denticulatis, lateri- 

 bus complicatis. Lodiculce 2,hyalinEe, imberbes, semibifidse. 

 Stamina 3. 



58. PoA ABBKEViATA, panicula simplicissima coarctata 

 subovata, locustis 4-5-floris, glumae valvulis subgequalibus 

 acutissimis perianthia basi lanata lateribus pubescentia 

 sequantibus, foliis involuto-setaceis. 



Desc. Gramen 3-4-unciale. Culmi foliati, basi ssepe 

 divisi, laeves. Folia involuta, subsetacea, retrorsum scabra, 

 vaffincB fere ad basin usque fissse, cylindrarefe. Panicula 



