Phragmites 



GRAMINEAE 



Cleistogenes 



Leaf sheaths, at least the upper 

 ones, open: ovary with ter- 

 minal styles. 

 Inn. an open contracted or 

 panicle: lemmas awned 

 from the tip or awnless.. 16. Festuca 

 Infl. a single terminal spike- 

 like raceme 17. Brachypodium 



Leaf sheaths closed: ovary with 

 anteriorly placed styles (i. e. 

 styles attached on the side 

 facing the lemma); lemma 

 awned from the bifid apex.. 18. Brormis 



6. Phragmites Trin. Reed M^M (Lu Wei Shu) 

 Tall perennial reeds with lfy. culms: spikelets in large terminal panicles; the 

 floret with glabrous lemma and long silky rachilla; 4 species in the north temperate 

 zone; 2 in China. (Greek: phragmites, growing in hedges.) 



1. Phragmites communis Trin. Common Reedgrass Sflg: (Lu Wei; Rushes) (G.M 

 131). Tall reed, 1-5 m. high; fls. IX; fr. X; hairs of rachilla exceeding the spikelet. 

 North temperate regions; locally in An., Ku. Swampy Places. Fig. 405. 



7. Neyraudia Hook. f. fSirM (Lui Lu Shu; Reed-like-grass Genus) 

 Stout rigid perennials with linear If. blades: spikelets on slender branches in 

 open panicles: lemmas with lateral nerves submarginal and \ong-pilose; rachilla 

 disarticulating about the middle, forming a short pubescent stipe. 3 species in tropical 

 Asia, Africa, and Madagascar; 2 in China. (Anagram of Reynaudia, after J. J. Reynaud, 

 1773-1842, French surgeon.) 



Key to the Species 



Sheaths marked with a line of hairs around the collar: spikelets 4-8- 



fld. ; the lower floret empty 1. N. reynaudiana 



Sheaths without a line of hairs, around the collar: spikelets 3-6-fld.; 



the lower floret perfect 2. N. montana 



1. Neyraudia reynaudiana (Kunth) Keng (Hitch. 190). Robust grass, 1-3 m. high; 

 fls. IX; fr. X. Southern and eastern Asia; locally in An., Ki. Grassy slopes. 



2. Neyraudia montana Keng (Si. 6: 151, 156). Culms, to lm.; fls. VIII; fr. IX. 

 Southern and eastern China; locally in An., Che., Ki. Mountain roadsides. Fig. 

 406. 



8. Cleistogenes Keng H^M (Yin Tzu Ts'ao Shu; Hidden-seed-grass Genus) 

 Perennials: spikelets of two forms; one in panicles of spike-like racemes; the other 

 hidden within the upper If. -sheaths: lemmas awned or mucronate. About 10 species, 

 in southern Eurasia; 9 in China. (Greek: kleistos, shut, and genes, a suffix to signify 

 development.) 



Key to the Species 



a. First lemma mucronate, or with an awn 1-3 mm. long. 



Glumes acuminate; the second 4-6 mm. long, frequently 3-5-nerved 



441 



