AVALYST8. xlx 



tprior 8e<nn/»nts cohering. Siatncns 4-6, nttnched lo the base of the perianth 

 Fruit on psulur. Htrbaccoiis plants, crow in£j in wet ?oil>, wiih the stems of- 

 ten naked, or c«»vereiJ with sphi sheailis. Leaves when prescm Uncar. Flow- 

 ers ill heads, very ?innll. 

 Gmus. EntK-aulon p. 259. 



Order 117. Typoace^. Flowers nionopcioiip, arranged on a naked spadix 

 Perianth 3-leaved. Stamens 2-6, with long filaments. Fruit dry, indchiscent, 

 l-cel!ed, l-«ecded. Herbaceous plants, j^rowing in ditches and marshes, with 

 eneiform leaves. Flowers without a spiithc. 



Gmtra, Sparganium p. 260. Typlia p. 260. 



Order 118. Aroide.b. Flowers monceciousor perfect, arranged on a spa-t 

 dii. Perianth nunc, or 4-6 parted. Stamens hypogynous, very short. Ovary 

 superior, 1 celled, or very rarely 3-cellfd. Stigma sessile. Herbaceous plants , 

 generally with tuberous roots. Leaves sheathing at the base, with parallel 

 Teins. Growing mi wet places. 



Genera. Acorus p. 260. Orontium p. 260. Arum 261. Caladium 261. 



Order 119. Fluviaj.ers. Flowers nioncecious or pertect. Perianth 2-4 

 parted. Stamens definite, hypogynous. Stigma simple. Fruit dry, indchis- 

 cent 1-celied, 1-seeded. Herbaceous, water plants, with cellular leaves. — 

 Flowers usually m terminal spikes, sometimes solitary 



Genera. Zostcra p. 262. Caulinia 262. Kuppia 262. Potamogeton 262. 



Order 120. Ju.ncagi.neje. Flowers perfect. Perianth 6-leaved. Stamens 

 3-6, hypogynous. Stigmas 3. Fniii 3-4 united capsules, opening at the base 

 Herbaceous hog plants, with ensiform leaves. Flowers in spikes or racems. 



GtJius. Trigluchin p. 263. 



Order 121. Pistiacex. Flowers 2, enclosed in a spathe. Stamens 2-7. 

 Style 1, short. Fruit indehiscent 1, or more seeded. Floating plants, with 

 cellular, lenticular or lobed stems .ind leaves. 

 Genera. Limna 263. Pislia 263. 



Scb-Class III. GLU.MACE^. 



Flowers destitute of a true perianth ; the floral envelopes, 

 consisting of imbricated bracts, which are alternate instead 

 of verticillate. 



Order 122. Grami.vex. Flowers usually perfect, sometimes monoecious or 

 polygamous. Glumes usually 2, alternate, generally unequal, someiimcs sin- 

 gle. PaleaE 2, alternate. Stamens hypogynous, 1-6. Anthers versatile. Styles 

 2, occasionally 1 or 3. Culms cylindric, with a silecious crust. Leaves al- 

 ternate, with a split sheath. Flowers in small spikes, the spikes arranged in 

 racemea or panicles. 



Tribe I. Airrostidea;. Genera. Agrosfi?" p. 264. Trichodium p. 265. Muh- 

 lenbergia p. 266. Alopecurus p. 266. Phlenm p. 266. Phaleris p. 266, 



Trihe 2. Paniceae. Gcneni. Panic um p. 267. Digit aria p. 270. Paspalum 

 p. 270. Ceresia p. 271. Aulaianthus p. 271. Ceuchrusp. 271. Tripsacum 

 p. 272. 



Trice 3. Siipaoee. Genus. Stipa p. 272. 



TVifce 4. BromoK. Gen-ra. Aristida p 272. Calamagrostis p. 273. Anthox- 

 anthump. 273. Aira p 237. Avena p. 274. Atundo p 274. Festuca p. 275. 

 Oratocnioa p. 275. Dnctylis p. 275. Bromus p. 276. Poa p. 276. Uniola 

 p. 277. Briza p. 27S. Melica p. 278. 



7V»6r 5. ChlorideaB. Genera. Cynodon p. 278. Chloria p. 279. Mono- 

 cera p. 279. Eleusine p. 27'J. 



Tuibe6. Cerealie. Genera. Elymu« p. 280. Rottbollia p. 280. Spartina 280. 



Tribe 7. Saccharinee. Genera. Andropogon p. 2d0. Gymnopogon p. 

 S81. Lnanthua p. 281. 



