210 MONOCOTYLEDONEJE. ISCHEMUM. 
spiculze sessilis gluma F= dorso plana, inferne utroque margine nodu- 
lis 2 parum distinetis notata. — I. semisagittatum Thwaites En. Pl. 
Zeyl. p. 365 non Roxb. 
Perenne. Culmi ascendentes, simplices v. ramulo brevi aueti, apice 
elavati. Vaginze subeompress&®, superne carinatz, laxæ, glaberrims 
‚v. superne pilosæ. Ligula 1—2 mm. longa, rotundata, subaurieulata, 
glabra. Laminæ inferiores brevissime petiolatze, superiores subsessiles, 
lineari-lanceolatz, 6—8 em. longe, 9—12 em. lat, acute, rigidule, 
nigrescentes, utrinque molliter pilosæ, margine scabro undulatz, 
costa media tenui nervisque lateralibus non prominentibus percursæ. 
Racemi 3—4 cm. longi, crassiusculi, glabrescentes; articuli spicula 
!/4— /,, pedicelli ea vix '/, breviores, angulo exteriore pilis rigidulis ca- 
nescentibus articulo 3—4-plo brevioribus ciliati, ceterum glaberrimi. 
Spiculz sessiles cum callo 1 mm. longo basi pilis canescentibus ipsum 
subsuperantibus barbato 7 mm. long&, oblong&, lividæ; gluma I"* 
coriacea, obtusa, apice alis protraetis inzequaliter bidentula, carinis 
in '/, superiore anguste albo-alata, alis glabris, obsolete nervata, dor- 
so glabra, laeviuscula ; II“ P» :equans, chartacea, ovato-lanceolata, 
acuminata, carina elevata sed obtusa infra apicem valde sinuata, 
exalata, lzevi, tenuiter 5-nervis, dorso lzevis ; He I” subzequans, mem- 
branacea, lanceolata, 3-nervis, marginibus implicatis ciliolata ; palea 
simillima, binervis, glabra; IV* quam II“ '/, brevior, oblonga, ad '/, 
usque bifida, glabra; arista 15 mm. longa columnä fuscá glaberrimä 
subulam parum pallidiorem valde tortam æquante; ejus palea glumá 
'/, brevior, anguste lanceolata. Spiculze pedicellate 5—6 mm. long, 
oblong&, livide, mutic®, callo minute barbatulo; gluma I“ apice 
obliquo obtusiuscula, altero margine alata, altero fere rectilineo 
exalata, 7-nervis, enodis; II“ acuta, vix carinata, non gibba, 1—3- 
nervis ; IV* integra. Reliqua ut in sessilibus. 
Ceylon (Thwaites 2625). 
6. I. impressum; laminis inferioribus sensim in petiolum 1—2,5 
em. longum contractis ; spiculæ sessilis gluma I™ dorso medio impres- 
sione semilunari profunda notata. 
Culmi decumbentes, dein ascendentes, parte erecta cire. 16—20 
cm. alti, graciles, ramosi, ramis floriferis ssepe binis brevibus, apice 
vix elavati. Vaginz compresse, carinatæ, ventricos®, glaberrim:e, a 
culmo sspe solutæ, summa lamina brevi instructa. Ligula lineari- 
oblonga obtusa, 2—4 mm. longa, glabra. Laminæ superiores basi plus 
minus cordata subsessiles, omnes lanceolatze, 8—10 em. longze, 1—1,5 : 
em. latz, tlaccidæ, virides, subtus pilis basi tubereulatis mollibus — — 
