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maphroditi, barba involucrati, gluma 2-valvis cartilaginea, valvis inegulariter 

 inaequalibus , externa 2-fida, interna apice aristata : gluma corollina brevis 

 pediceliata membranacoo-hyalina bivalvis, valva externa, internam majorem 

 apice integaam vel i-tidam aristatam , amplectans: arista artictHata libera: 

 floris masculi gluma calycina externa apice breviter aristata, interna mutica, 

 reliqua ut in hermaphrodito: floris tertii, rudimentum perigonii corollini. 



58. SORGUM. Pers. Flores geminati, summi quandoque 3-nati polyga- 

 mo-monoici, omnes ut plurimum pedunculati, in panicula vel racemo: floris 

 bermaphroditi, perigonii, gluma calycina 2-valvis cartilaginea mutica , valva 

 externa apice 3-denlala, gluma corollina inclusa 2-valvis memhranacea hya- 

 lina, externa mutica ciliata, interna multo minor apice 2-fida mutica vel ari- 

 stata, arista articulata inferius contorta: floris masculi gluma calycina cartacea 

 2-valvis, valvis muticis, externa 3-dcntata, corollina inclusa, valvis muticis ci- 

 liatis: caryopsis ovoidea, glumis corollinis, involuta: albumen niveo-farinaceum. 



59- HOLCUS L Flores binati polygomo-inonoici spicati in paniculae 

 ramis: perigonii gluma calycina communis 2-valvis, vjilvis subaequalibus, co- 

 rollina floris hermafroditi sessilis cartilagiuea 2-valvis, externa carinata, in- 

 lerna angustior: stamina 3: slyli 2 breves: stigmata plumosa: squamula ne- 

 ctarifera membranacea fissa: caryopsis tecta: floris masculi pedicellati con- 

 formis, valva externa dorso breviter aristata: arisla articulata. 



00. ARRENANTHERUM Palis. Flores binati polygamo-monoici , basi 

 barbati, in panicula contracta; perigonii gluma calycina communis 2-valvis , 

 valva externa brevi l-nervi, interna 3-nervi: floris hermaphroditi gluma corol- 

 lina 2-valvis, valva externa 7-nervi, apice integra aut bifida, mutica aut vari- 

 mode aristata, interna 3-dentata, ad marginem utrinque inflexa, nervis ciliata:" 

 squamae 2 nectariferae lanceolatae: caryopsis valvis corollinis involuta: floris 

 masculi 3-andri, valva corollina cxterior iongius aristata. 



61. ROTTBOLLIA L. fil. Flores 1-2 bermaphroditi , quandoque alter 

 masculus, ante anlhesim fovea rachidis immersi , in spica curva vel recta: 

 perigonii gluma calycina 1-2-valvis cartilaginea, flores semper tegens, valvis 

 externis, in floribus terminalibus , oppositis , gluma corollina membranacea 

 2-vaIvis mutica, valvis subaequalibus: squamae nectariferae duo parvae: ca- 

 ryopsis rostrata, valvis calycinis cincta. 



62. PSILURUS Trin. Flores solitarii spicati, in foveis, rachidis articu- 

 latae, ante anthesim omnino abscondili: perigonii glumae calycinae 1-2-valvis, 

 valvae laterales, flori multo minores, gluma corollina 2-valvis , valvis longi- 

 tudine aequalibns , externa cartacea ut plurimum longe aristata: stamen 1: 

 squamae nectariferae 2 minimae: caryopsis valvis calycinis cincta. 



