91 



LXIII. LeptocJiloa BEAUV. 



Leptochloa chinensis NEES., MATSUM. et HAYATA. I.e. p. 539. 



LXIV. Arundo LINN. 



Key to species. 

 Leaves broader, glumes I. and II. nearly 1 cm. long, tall grass. 



1. A. Donax. var. coleotricJia. 



Leaves narrower, glumes I. and II. 3-4 mm. long ; smaller grass. 

 2. A . formosana. 



1. Arundo Donax LINN. var. coleotricha HACK.; MATSUM. et HAYATA 

 I.e. p. 540. 



2. Arundo formosana HACK.; MATSUM. et HAYATA I.e. p. 540. 

 A. formosana HACK. var. gracilis HACK. 



LXV. rJiragmites TRIN. 

 Key to species. 



Panicle and glumes not spreading much 1. P. communis. 



Panicle and glumes spreading much 2. P. Karka. 



1. Phragmites communis TRIN.; MATSUM. et HAYATA I.e. p. 541. 



2. Phragmites Karka TRIN. MATSUM. et' HAY ATA I.e. p. 541. 



LXVI. Eragrostis BEAUV. 

 Key to species. 



1. Spikelets not exceeding 2 mm. in length, axis of spikelets articulate. 2 

 Spikelets more than 2 mm. in length, axis of spikelets not articulate ... 3 



2. Palea not ciliate at the margin \.E. interrupta var. tenuissima. 



Palea long ciliate at the margin 2. E. tenella. 



3. Mature spikelets not exceeding l^mm. in breadth 4 



Mature spikelets more than 1 ^ mm . i n breadth 5 



4. Glumes narrower and acute at the apex 3. E. pilosa. 



Glumes broader and obtuse or rounded at the apex 4. E. minor. 



5. Panicles cylindrical 5. E. geniculata. 



Panicles more or less diffuse 6 



6. Spikelets nearly 3mm. in breadth 7 



Spikelets less than 3mm. broad 8 



7. Spikelets usually purple toward the tip 6. E. elongata. 



J, LIBRA 



