GRAMINE^E. 77 



geminatim ad nodos rhachis spicre dispositae pedicellatae, pedicello altro longiore 

 altro breviore ; gl. I. lanceolata 5 mm. longa 1 mm. lata apice acuminata 

 et 2-aristata, aristis 1 mm. longis, margine interiore plicata basi hirsuta 

 creterum glabra ; gluma II. lanceolata 3 mm. longa apicc acuminata apice 

 arista 8 mm. longa instructa inargine sursum ciliata ; gl. III. linearis 2 mm. 

 longa ^ mm. lata hyalina apice 2-dentata, inter dentes arista 10 mm. longa 

 instructa, arista Lasi plicato-geniculata ; gl. IV. cm. III. conformis ; palea ? 



HAB. Mentenzan, leg. T. SOMA, Nov. 1914. 



Near Pollinia, but differs from the genus in having binate spikelets 

 which are both pedicellate, and in the 2-aristate gl. I., 1-long awned glumes, 

 II., III. and IV. 



XXXI. SaccJtaruin LINN. 



1. Hairs on the callus equal or shorter than spikelets 1. S. Narenga. 



Hairs on the callus much longer than spikelets 2 



2. Stem hairy below the panicles 2. S. spontaneuin. 



Stem glabrous below the panicles 3. S. officinal e. 



J Saccharum Narenga HAM.; MATSUM. et HAYATA I.e. p. 519. 



2. Saccharum spontaneum LINN.; MATSUM. et HAYATA I.e. p. 519. 



3. Saccharum officinarum LINN.; MATSUM. et HAYATA I.e. p. 519. 



XXXII. Erianthus MICH. 



1. Hairs of spikelets more or less purple 1. E. pottinioides. 



Hairs of spikelets more or less brown 2. E. formosanus. 



1. Erianthus pollinioides KENDLE ; MATSUM. et HAYATA I.e. p. 520. 



2. Erianthus formosanus STAFF ; MATSUM. et HAYATA I.e. p. 520. 



XXXIII. Xschcemum*IjiNN. 

 Key to Species. 



1. Rhachis of spikes densely long barbate at the nodes only 



1. 7. angustifolium. 



Rhachis of spikes not barbate at the nodes..., 2 



2. Spikes solitary 2. /. muticum. 



Spikes binate or ternate 3 



3. Outer glumes densely or loosely barbate 4 



Outer glumes nearly glabrous 3. /. Sieboldii var. formosanum. 



