Zizania 



GRAMINEAE 



Isachne 



1. Zizania latifolia (Griseb.) Turcz. ex Stapf M (Ku) (Mak.F.874). Culms 90-180 cm. 

 high; fls. IX; fr. X. Eastern Asia; locally in Ku. Streams, lakes and marshes. 

 Fig. 435. 



In the Shanghai and Nanking vegetable markets swollen shoots, called Water Bamboo, 

 which are smut-infected shoots of Zizania latifolia, appear under the names 3g^ (Chiao Sun; 

 aquatic bamboo) and ^^g (Chiao Pe). The inner fleshy portion is used as a cooked vegetable 

 until the maturing smut spores produce black streaks in the white flesh, and it becomes inedible. 

 (Read 40). 



Tribe XI. Paniceae Hi^ (Shu Ts'u) 



Spikelets 2-fld.; the upper floret perfect; the lower stamina te or neuter (perfect 

 in Isachne): glumes 2, thinner than the fertile lemma; the first smaller, minute or 

 wanting; sterile lemma resembling the second glume in texture and nervation; fertile 

 lemma firmer or crustaceous at maturity (except in Pseudor aphis), awnless, embracing 

 a palea similar in texture: infl. an open, contracted, or spike-like panicle, or of one 

 to many unilateral spike-like racemes arranged racemose, digitate or solitary. 



Key to the Genera 



A. Spikelets, at least a part of them, subtended or surrounded by 

 1-many bristles; or the rachis produced beyond the spikelets. 



SpiKelets falling off from the bristles or the rachis 65. 



Spikelets falling together with the bristles or the rachis. 



Bristles solitary to each spikelet or wanting at the lower part of 



the rachis 66 . 



Bristles usually many to each spikelet 67. 



AA. Spikelets neither subtended by bristles nor the rachis produced beyond 

 the spikelets. 

 B. Spikelets disarticulating above the glumes, usually with 2 fertile 



florets 56. 



BB. Spikelets disarticulating below the glumes, usually with a single 

 fertile floret. 

 C. Fertile lemma leathery-indurated; the margins hyaline, not 



inrolled; spikelets in digitate racemes 57. 



CC. Fertile lemma chartaceous-indurated; the margins not hyaline, 

 inrolled; spikelets not in digitate racemes. 

 D. Spikelets laterally compressed or somewhat oblique, the 



second glume broad, somewhat inflated 58. 



DD. Spikelets dorsally compressed, not oblique. 



E. Infl. an open diffuse panicle 59. 



EE. Infl. of few to many spike-like racemes arranged 

 paniculate, lacemose, or digitate. 

 F. Glumes or sterile lemma awned (except in some 

 ssp. of Echinochloa). 



Spikelets awned from the glumes 60. 



Spikelets awned or awn-tipped from the sterile 



lemma 61 . 



FF. Both glumes and sterile lemma awnless. 



G. First glume well developed 62. 



GG. First glume typically wanting (sometimes 

 developed in Paspalum distichum). 

 Back of the fertile lemma (the convex side) 



467 



Setaria 



Pseudor aphis 

 Pennisetum 



Isachne 



Digitaria 



Sacciolepis 

 Panicum 



Oplismenus 



Echinochloa 



Brachiaria 



