88 



GR AMINES. 



L1I. Calamagrosiis ADANS. 



1. Branches of panicles much contracted, spikelets much narrower, densely 



clustered 1. O. Epigejos var. densiftora. 



Branches of panicles not contracted, spikelets not clustered, densely or 

 very laxely arranged 2 



2. Branches or branchlets of panicles straight, spikelets densely arranged. 



2. C. formosana. 



Branches or branchlets of panicles flexuous, spikelets few, loosely arranged. 

 3. O. morrisonensis. 



1. Calamagrostis Epigejos BOTH. var. densiflora LEDEB.; MATSUM. 

 et HAYATA I.e. p. 536. 



2. Calamagrostis formosana HAYATA sp. nov. (Fig. 55). Culmus 

 70-80 cm. altus glaber et lasvis erectus rectus teres. Folia radicaria non 

 visa; caulina : lamina linearis 30-40 cm. 



longa 6-7 mm. lata apice acuminate basi vix 



attenuata plus minus scabra, vagina 14cm, 



longa caulem amplectanti, ligula magna 8 



mm. longa 5 mm. lata membranacea. Pani- 



cula terminalis cylindrica 20 cm. louga 4 cm. 



lata ; rhachis teres recta, ramis rectis ascen- 



dentibus primariis 5-6 fasciculatis, fasciculis 



alternis circ. 5 cm. longis, inferioribus a se 



1-3 cm. remotis rectis, ramulis secundariis 



2-3 fasciculatis, fasciculis alternis plus 



minus scabris, pedicellis ultimis 1-2 mm. 



longis scabris. Spiculte pallido-violascentes 



vel non coloratae. Gl. I. lanceolata 4| mm. longa 1 mm. lata apice acumi- 



nata subglabra dorso versus apicem plus minus carinata scabra; gluma II. 



fere conformis ; gl. florens hyalina 5-nervosa 3 mm. longa oblonga 1 mm. 



lata apice truncata denticulata dorso prope basin arista una instructa, arista 



4 mm. longa haud torta scabra, palea hyalina lanc'eolata 2J mm. longa baud 



carinata ; rhacheola supra glumas I. et II. brevissima longe pilosa, pilis 



2^ mm. longis paten tibus. Stamina 3. 



Pig. 55, Calamagrostis formosana, 

 HAYATA. a, a spikelet; b, gl. I.; c, 

 gl. IT.; d, a flowering glume with its 

 palea ; e, the same glume ; f, a palea ; 

 g, stamens. 



