dE 
ORYZE.. id 7 
Folia augusta, subinvoluta. Ligula longa, lacera. Panicula effusa, erecta. Spicule 
pedicellatee, basi cum pedicello articulate. 
Affinitate proxima Oryz: et Zizanie. (Ex Brown.) 
SPECIES : 
1. Potamophila parviflora Brown. 
5. HYDROPYRUM Lixk. 
Spicule uniflorz, mascule et femine: in eadem panicula; hee superiores; illo 
inferiores. Masc. : Glume nulla. Palege duse, membranacese, subequales; inferior 
acutato-mucronata , quinquenervia , concava , superiorem trinerviam involvens. 
Squamule dus, subcarnose, glabrae. Stamina sex. Pistilli rudimentum minutum. 
Fem. : Glume : rudimentum cupuliforme, membranaceum, orbiculatum. Palece 
du», membranacez, lineares; inferior trinervia, in aristam longissimam rectam 
non articulatam desinens, superiorem angustiorem quadrinerviam involvens. 
Squamule due, glabre, longitudine ovarii. Filamentorum rudimenta. Ovarium 
sessile, oblongum, glabrum. Styli duo, breves, divaricati. Stigmata penicilliformia ; 
pilis subulatis , simplicibus. Caryopsis gracilis , elongata, cylindracea, sulco longi- 
tudinali notata, glabra, levis, libera, paleis involuta, stylo rostrata. 
Gramen ( Americe borealis) aquaticum. Folia plana. Panicula ramosa, inferne 
mascula, superne feminea. Spicule pedicellat;e, per racemos dispositi , cum pedi- 
cello articulata. | 
Proximum Leersiz. 
SPECIES GENUINA : 
1. Hydropyrum esculentum Liz. ( Zizania aquatica Linn. Sp. 1408 excl. syn. Sloan. — Z. clavulosa 
Mich. — Zizania palustris Linz. Mant.295). 
SPECIES DUBIA : 
2. Hydropyrum? fluitans ( Zizania fluitans Mich. — Hydrochloa caroliniensis Beau.) — America bo- 
] : . 
6. ZIZANIA Lis. 
Spiculie uniflorz, mascule et femineg in eadem panicula; hae in ramis superiori- 
bus; ille in inferioribus. Masc.: Glumz duc, minutissimee , rotundatee, membrana- 
cee , in unam orbicularem connate, Palee due, membranaceo - subchartacew, 
