APPENDIX I 417 



Sub-Family 2. Vallisnerioideae. 

 Tribe. HydrillecB. 

 Genus. Elodea (Vol. Ill, p. 282). Hydrilla. 



Order 3. GLUMiFLORiE. — Flowers naked, rarely 

 with hair-like or true perianth, covered by glumes ; 

 ovary unilocular, with one ovule. 



Family i. Graminaceae (Vol. Ill, p. 395). — Flowers 

 usually bisexual (plant moncecious as a rule), with axillary 

 sessile spikelets, triandrous; anthers versatile; ovary unilocu- 

 lar ; stigmas 2, feathery, sessile ; ovules 2 ; fruit a pseudo- 

 achene or caryopsis ; endosperm abundant. 

 Sub-Family i. Panicoideae. 

 Tribe i. Panicece. 



Genera. Fanicum (Vol. Ill, p. 400), Setaria. 

 Tribe 2. Oryzece. 



Genus. Leersia. 

 Sub-Family 2. Poeoideae. 

 Tribe 3. PhalaridecB. 



Genera. Phalaris (Vol. Ill, p. 401), Anthox- 

 anthum^ Hierochloe, 

 Tribe 4. Agrostidece. 



Genera. Milium^ Alopecurus^ Phleum^ Mibora^ 

 Agrostis, Polypogon^ Calamagrostis, Gastri- 

 dium, Apera, Deyeuxia, Ammophila (Vol. Ill, 

 p. 403), Lagurus. 

 Tribe 5. Avenece. 



Genera. Holcus, Aira, Corynephorus, Deschampsia^ 

 Trisetutn^ Avena, Arrhenatheriun (Vol. Ill, 

 p. 405). 

 Tribe 6. Festucece. 



Ge?iera. Sieglingia^ Phragmites^ Seskria, Cynosurus^ 

 Kceleria, Molinia^ Catabrosa^ Melica, Dactylis 

 (Vol. Ill, p. 409), Briza^ Foa^ Glyceria, Festuca^ 

 Bromus^ Brachypodiutn. 

 VOL. III. 27 



