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calycina 3-valvis, valvis linearibus subaequalibus muticis carinato-canalicula- 

 tis: gluniae coroUinae valva exleina ovato-lanceolata 5-nervis arislato-biden- 

 tata, quandoque simpliciler aristata, valva interna 2-nervosa breviter ^-fida 

 mutica: stamina 3: styli i, stigmatibus plumosis: squamae 2 nectariferae: 

 caryopsis 2-roslrata libera, vel valvae corollinae internae, adhaerens. 



75. FESTUCA L. Flores spiculae multiflorae compressae , in panicula 

 vel racemo: perigonii gluma calycina 2-valvis, spiculis brevior, valvis inae^ 

 qualibus carinatis, gluma corollina bivalvis , valva externa carinato-acumi- 

 nata, quandoque breviter emarginata, mucrone vel arista solitaria jamdudum 

 terminata, valva interna nervoso-dentata, nervis saepius scabris aut ciliolatis: 

 stamina 1-3: styli 2, stigmatibus plumosis: squamae 2 nectariferae: caiyopsis 

 1-sulcata, gluina corollina pcrsistente, cincta. 



76- DACTYLIS //. Flores spiculae congestae multiflorae subcompressae, 

 in racemo secundo: perigonii gluma calycina 2-valvis , valvis inaequalibus 

 subintortis, majore carinata , gluma corollina , valvis inaequalibus , externa 

 apice emarginato-setigera, interna bifida dentata; squamae 2 parvae necta- 

 riferae: styli brevissimi, stigmutibus plumosis: caryopsis oblonga libera, glu- 

 mis corollinis persistentibus, cincta- 



77. BROMUS L. Flores distici in panicula vel racemo: perigonii gluma 

 calycina 2 valvis, valvis inaequalibus acutis canaliculatis, spiculis multifloris 

 oompressis, brevioribus: gluma corollina 2-valvis, valva externa apice inte- 

 gra vel 2-fida, infra apicem aristata, arista simplici recta , arefactione ali- 

 quando intorto-recurva, valva interna varimode ciliata, stamina 2-3: styli 2 

 stigmatibus plumosis: squama nectarifera ut plurimum solitaria : caryopsis 

 oblonga obtusa apice villosa. 



78. ARUNDO L- Flores solitarii vel spicati in racemo vel panicula: pe- 

 rigonii gluma calycina 2-valvis, valvis inaequalibus muticis nudis: gluma co- 

 roilina membranacea, valvis 2 inaequalibus, villis varimode cintis, stipitulo, 

 pilis pinnato-disticis, adjecto: valva interna minore mutica , externa modo 

 mutica, modo dorso vel apice aristata, arista simplici recta vel refracta: sta- 

 mina 3 exilia, valvas coroUinas, subaequantia: styli 2: stigmatibus dense pi- 

 losis. squamae 2 nectariferae: caryopsis libera, valvis corollinis, cincta. 



79. AMMOPHILA Host. Flores solitarii compressi in racemo spicaeformi: 

 perigonii cartacei gluma calycina 2-valvis, valvis aequalibus, gluma corollina, 

 longioribus: valvae corollinae aequales basi villo cincta, externa 5-nervi, nervo 

 carinali in mucronulo, lateralibus duobus in dentes productis, valva interior 

 nervosa 4-dentata, stipitulo densc barbalo adjecto: stamina 3 antheris elon- 



