77 



geminatim ad nodos rhachis spicas dispositae pedicellate, pedicellc altro longiore 

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

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

 CEeterum glabra ; gluma II. lanceolata 3 rnm. longa apicc acuminata apice 

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

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

 instructa, arista basi 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, 

 IT., III. and IV. 



XXXI. Saccharum 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. spontaneum. 



Stem glabrous below the panicles 3. S. officinale. 



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



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



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



XXXII. JErianthus MICH. 



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



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



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



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



XXXIII. Ischcemum LINN. 

 Key to Species. 



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



1. 7. angustifolium. 



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



2. Spikes solitary 2. 7. muticum. 



Spikes binate or ternate 3 



3. Outer glumes densely or loosely barbate 4 



Outer glumes nearly glabrous 3. 7. Sieboldii var. formosanum. 



