ORYZE^. 173 



Culms 30 cm. high, branching from a creeping rliizoma. Leaf- 

 blades flat, smooth. Base of panicle scarcely above the sheath. 

 Spikelets lanceolate, generally equal in length to tlie pedicels. 

 Outer glume of staminate spikelot 7-nerved, 6 mm. long; inner 

 glume 9-nerved, emarginate; ghinies nearly equal; pistillale s])ike- 

 lets 50-80. Panicles about the size of the former species, glumes 

 much alike, 7-nerved, and half us long as those of the staminate 

 spikelets. 



Florida, Mexico, to Brazil. 



38. (40). ZiZANiA L. Sp. PI. 991 (1753). Wild Rice. In- 

 dian KicE. Wateu-oats. Ilydr02)iih(v} Link, Ilort. Berol. 1 : 253 

 (1827). Mclinnm Link, Ilandb. 1; 90 (1829). 



Si)ikelets narrow, monrocious, 1-flowored, sessile or with short 

 jiedicels on the jointed branches of the jointed panicle. CJlumes 2, 

 surrounded at the base by a more or less prominent cartilaginous 

 ring, sliglitly unecjual, membranous, convolute, concave or slightly 

 compressed, the outer broader, acute, or in tlie pistillate spikelet 

 awned and empty, the inner floral glume scarcely sliorter, and awn- 

 less : palea 0. Stamens G. Styles more or less joined at the base, stig- 

 matic hairs simply plumose. Grain included by the membranous 

 glumes, but not adherent. A large aquatic grass with long flat in- 

 equilateral leaf-blades. Panicle terminal, ample, loosely flowering, 

 having numerous long slender rays. 



One well known species found in North America. An impos- 

 ing plant with a subtropical aspect. 



1. Z. aquatica L. Sp. PL 991 (1753). Wild Rice. 



MrlitiHiii jjithifttfe, Link, 1. c. Z. pnlustris L. Mant. 2:295 

 (1771). Z. clavulosa Michx. Fl. Bor. Am. 1:75 (1S()3). Uydi-o- 

 pyvum csculentuni Link, llort. Berol. 1 :252 (1S27). 



Z. A^/Z/b/m (iriseb. Turcz. Mull. Soc. Aat. Mosc lO,') (1S38). 



Annual: 1—4 m. high, cidm hoUovv with nuuuTous delicate trans- 

 verse partitions within the internodes. Ligule acute. 1 cm. Ioul;-: 

 ]o\\vv blades 0.4-1 metre lona. wit li winged i)eti()les. ujipei- Id'oad at 

 the base. Lower part of the pyrainidal pjiniele stiimiiuite. spi-eailing; 

 the upper part pistillate, erect: pedicu'ls slender, clavale, outer- 



