— 27 — 

 68. PANICUM L. Flores 2-nati, flosculo supeiiore hermaplirodito, infe- 

 riore masculo vel neutro, in paiiicula racemo vel spica, setis scabris, quando- 

 que interpositis: perigonii giuma calycina 2-vaIvis, valvis saepe inaequalibus , 

 quandoque aristatis, altera minima vel obsoleta: gluma corollina, ftoris her- 

 maphroditi, cartilaginea 2-valvis , valva externa cymbiformi , inlerna plana 

 margine inftexa: floris alteri 1-2 valvis, glunia membranacea, valva externa, 

 valvae majori glumae corollinae, similis: caryopsis, valvis corollinis , cincta. 



64. BECKM.ANNIA Hust. Flores solitarii vel 2-3-nati in spica ramosa 

 densa secuudiflora, spiculis disticis: perigonii gluma calycina 2-valvis, valvis 

 aequalibus oppositis cymbifonnibus. floribus brevioribus, gluma corollina 2- 

 valvis, valvis lanceolatis, exforna apice rostellata sube.verta: interna indivisa: 

 squamae 2 nectarifei'ae: caryopsis libora, valvis calycirlis, involixta. 



*** Gluinae calycinae multiflorae. 



65. TRITICUM L- Flores numero varii in spica vel racemo: spiculae soii- 

 tariae cartilagineae, facie racbidis oppositae, sessiles vel pedunculatae: perigonn 

 gluma calycina 2-vaIvis, spiculis brevior, valvis oppositis muticis vel aristatis: 

 glumae corollinae valva extcrna ventricosa aut compresso-canaliculata inutica 

 vel aristata, valva interna , nerviis ciliatis aut scabris in denles productis: 

 squamae nectariferae duo minutae: caryopsis l-sulcata libera- 



66- LOLIUM L. Flores in spica composita: spiculae compresso-disticae 

 alternae, flicie, rachidis articulatae, laterales: perigonii gluma calycina 1-val- 

 vis, in spicula terminali 2-valvis: gluma corollina 2-valvis , valvis inaequa- 

 libus, externa mutica vel arista simplici donata: squamae nectariferae 2 ca- 

 ryopsis 1-sulcata, valvae corollinae cxlernae, adhaerens. 



67- AEGILOPS L- Flores 2-4-terni [lolygamo-monoici, in rachide arti- 

 culata, spicae continuae , subimmersi: perigonii gluina calycina cartilaginea 

 2-valvis, valvis aequalibus concavis truncatis, dentibus elongatis, vel aristis 

 3-5 donatis , floribus longioribus : flores 2-laterales majores bermaphroditi 

 sessiles, tertius masculus, et quarlus neuter, pedunculati: floris hermaphro- 

 diti giumae corollinae valva externa cartacea 2-3-aristata, interna membra- 

 naeea 2-dentata: flores imperfecti membranacei , aristis aut dentibus , bre- 

 viores: squamae nectariferae 2 divergentes: caryopsis sulcata libera. 



68- SESLERIA Scop- Flores in spica densa, spiculis paucifloris, inferio 

 ribus, bractea 1-pbyIla , subinde obsoleta , cintis: perigonii gluma calycina 

 cartacea 2-valvis, valvis aequalibus brevi-aristatis, glumu corollina 2-valvis, 



