GRAMINE.E. 



57 



species, the outer glumes are quite glabrous, and the flowering glume and palea 

 of the sessile lower sterile flower are membranous and quite glabrous, while 

 those of the stalked upper fertile flower are coriaceous and densely hirsute. 

 2. Isachne arisanensis HAYATA sp. nov. (Fig. 29). Rhizoma igno- 

 tum. Caulis 60 cm. longus gracillimus simplex hand ramosus glaber basi 

 procumbens ad nodos radicans, internodiis 5-6 cm. longis. Folia tota caulina 

 patentissima recta, vaginis 3-3| cm. longis latere uno fissis margine ciliatis, 

 ligulis e pilis rectis 2 rnm. longis constitutis, laminis lanceolato-linearibus 

 5-10 cm. longis 5-7 mm. latis apice acuminatis basi plus minus contractis ad 

 2 mm. contractis margine scaberulis utraque paginc giabris. Panicula laxa 

 pyramidalis 9 cm. longa 

 totiusque lata apice acuta, 

 ramis et ramulis gracil- 

 limis giabris plus minus 

 crispatis laxe speculiferis, 

 pedicellis 5-10 mm. longis 

 giabris supra glumas in- 



feriores articillatis. Spidl- Fig. 29, Isachne arisanensis HAYATA ; a, a spikelet ; 



T -, 1-11 b, glume IT.; c, glume III.; <1, a palea; e, a pistil. 



ISB late obconicre 1^ mm. 



long-as 1^ mm. latre 2-florifern3 ; glumfo I. et II. inferiores vacure oblongs sub- 

 requales 1^ mm. longas 3-5-nervia3 glabra3 ; gl. III. et IV. floriferre subrequales 

 1^ mm. Ionga3 valde concavre cum palea induratte apice acutos ; Pal ere 

 oblongas 1 mm. longte dorso plana3 margiue interiore plicataa glabra3. 



HAB. Arisan : Mingetsu, locis umbrosis 7000 perl, alt., April. 1916. 

 leg. B. HAYATA. 



Near 7. austral Is Pi. BR., but differs from it by the much taller and 

 slenderer form with very much spreading panicles and smaller spikelets. 

 The leaves are much larger measuring 10 to 15cm. in length. 



3. Isachne australis R. Br.; MATSUM. ct HAYATA Enurn. PI. Formos. 

 p. 499. 



IsacJme Clarkei HAYATA Fl. Mont. Formos. p. 234, (non HOOK. f.). 



4. Isachne firmula BUSE ; HEMSLEY Ind. Fl. Sin. III. p. 322. 

 Isachne myosotis NEES. var. nudicjlumis HACK. ; MATSUM. et HAYATA 



