176 



PANICACEyE. 



21)3 (1893). Wild IUce. Zizania niiliacea Michx. Fl. Am. Bor. 

 1:74 (18U3). 



Culms 0.5-3 m. high; blades narrower than those of Zizitnia 

 atjuatica. Outer glumes 7-ncrved, terminating in a short uwn, 

 inner gluini's 3-nerved, acute. 



Florida, Scribnev 3005; Louisiana, Langloix; Texas, XetiUi'i/. 

 40. (44). Oryza \j. Syst. Ed. 1 (1735). liioE. FaUia ZoU. & 

 Mor. Syst. Vor/. Pt'l. ZoU. 103 (1840). 



Spiklots l-llowored, llat,articulato on short pedicels or sessile along 

 the ilexuose branelies of a terminal i)aniclo. Cilumes 4, 5J outer 

 ones very small, lanceolate, 2 inner ones eonii)licate and keeled, 

 coriaceous, the outcM'onc the largest, IS-o-norved; no ^-nerved palea. 

 Stamens G. Styles sliort. l)arely united at the base, (irain oblong 

 or narrow, enclosed in the hardened almost coherent upper glumes, 

 but free from them. Pericarp thin, lloxible, and, wlien wet, easily 

 separating. 



Large marsh cereal grasses with long flat, slightly inequilateral 

 leaf-blades. Spikelets covered with minute scars. 



There are 5-20 species, or possibly all belong to one variable 

 species. Found in the East Indies and Australia; a cereal much 

 cultivated in warm countries, where the land is wet 

 or at certain times inundated. 



1. O. SATivA L. Sp. I'l. 333 (1753). Rice. 

 Stems with the base creeping or floating, ascend- 

 ing, GO-120 cm. high. Ligule often 2.5 cm. long, 

 on the lower leaves, scabrid and jagged ; blades long 

 and rather broad, very scabrous, especially on the 

 upper side. Panicle narrow, erect, 15-30 cm. long. 

 Spikelets ovate-oblong, 7-10 mm. long. Upper 



Fio. 36.— Or.vza glumes very prominently nerved, the keels usually 

 tativa. SpiKe- ^. . , "^ ^ •'. , , . -^ 



let. (Ricliurd- cuiate, tlie outer one with 1 nerve on each sule, 



^°°'^ beside the nerve-like margin, closely embracing and 



almost connate with the inner glume, which is as long, but nar- 

 rower, with only 1 nerve on each side near the thin margin, both 

 glumes either shortly awued or, in some cultivated varieties, awn- 



