Zoysia GRAMINEAE Oryza 



" We have very little material of Z. sinica, and the descriptions of vegetative parts are 

 not detailed. Mr. Ian Forbes, who is working on them genetically, says they hybridize freely." 

 Agnes Chase. 



Tribe VIII. Phalarideae |PC^ (Yi Ts'ao Ts'u) 

 Spikelets with one perfect terminal floret and a pair of staminate or neuter florets 

 below; the latter (in ours) reduced to two small scale-like lemmas, falling attached to 

 the fertile floret: glumes 2, equaling the spikelet (in ours); fertile lemma indurate, 

 awnless; stamens 3, but 6, 4 or 2 also found in this tribe: inflorescence an open, 

 contracted or spike-like panicle. 



A single genus in our flora 51 . Phalaris 



51. Phalaris Linn. Canary Grass Hj^M (Yi Ts'ao Shu) 



Perennials (ours) with contracted panicles: spikelets 1-fld. with 2 small sterile 

 lemmas attached below, laterally compressed, awnless: glumes equal, 3-nerved, 

 exceeding the terminal floret; fertile lemma acute, finally indurate, enclosing a similar 

 palea. About 20 species, in temperate zones; 2 in China. (Ancient Greek name for 

 a grass.) 



1. Phalaris arundinacea Linn. Reed Canary Grass jfl^ (Yi Ts'ao; Spiranthes 

 Grass) (Hitch. 555). Culms 60-120 cm. high; fls. IV; fr. V. Temperate regions; 

 locally in Ku. Marshes, river banks and moist places. Fig. 433. 



Tribe IX. Oryzeae f&M (Tao Ts'u) 

 Spikelets perfect, 1-fld. or with two small scale-like lemmas below; the pedicel 

 sometimes elongate, jointed in the middle, disarticulating, the upper part forming a 

 stipe below the spikelet; glumes 2, minute or more frequently obsolete; fertile lemma 

 7-5-nerved, awnless or terminally awned; palea 2-3-nerved, the marginal nerves if 

 present enclosed by the lemma; stamens 6, 3, 2 or 1: hilum linear instead of 

 punctiform; aquatic or marshy perennials or annuals with open panicles or racemes. 



Key to the Genera 



Spikelets subterete or slightly laterally compressed; the pedicel elongate 



into a stipe below the spikelet: stamen 1 54. Chikusichloa 



Spikelets strongly laterally compressed; the rachilla not elongate into a 

 stipe below the floret: stamens 6 or 3. 



Sterile lemmas 2, small but distinct 52. Oryza 



Sterile lemmas wanting 53. Leersia 



52. Oryza Linn. Rice ffifif (Tao Shu) 

 Aquatic or terrestrial annuals or perennials with flat blades and terminal panicles: 

 spikelets 1-fld., strongly laterally compressed, ivith 2 minute scaly or bristle-like sterile 

 lemmas attached below: glumes obsolete or represented by 2 minute scale-like ap- 

 pendages at apex of the pedicel; fertile lemma chartaceous, awned or awnless, 

 5-nerved, the marginal nerves firmly clasping those of the similar palea. About 10 

 species, mostly Asiatic and African; one widely cultivated. (Name from oruzu, 

 ancient Greek name for rice.) 



1, Oryza sativa Linn. Rice % (Tan) (Hitch. 556). Culms about 1 m. high; fls. VIII; 



464 



