84 MONOCOTYLEDONEE. DIMERIA, 
v. subrobusti, superne demum longiuseule nudi, e basi ramosi, supe- 
rius simplices v. raro ramum floriferum unum edentes. Vagin® gla- 
brz v. patule pilosze, nodis glabris v. barbatis. Laminze e basi sensim - 
angustata a vagina subdistineta lineares v. sublanceolato-lineares, 
5—10 em. longæ, 3—7 mm. latze, rigidulze, margine leves, modo utrin- 
que pilosa modo margine tantum longe fimbriat®, nervis lateralibus 
utrinque 3—5 interjecti singulis lariis utrisque vix prominu- 
lis pereurs&. Racemi solitarii v. bii ambo a culmo et inter se subdi- 
vergentes, 4—8 cm. longi, crassi, recti, densissime floriferi, viriduli 
y. violascentes, pilosi; rhachis 1 mm. v. plus lata, dorso plana 3-nervis 
faeieque glabra, marginibus dense rigiduleque albo-ciliata (ciliis 
rhacheos latitudinem sequantibus), internodiis valde abbreviatis sub- 
inequalibus, alternatim 1 mm. et 1,5—2 mm. longis; pedicelli more 
rhacheos eiliati. Spicule 4,5—5,5 mm. long, callo pilis vix 1 mm. 
longis barbato. Gluma I"* carina margineque pilis mollibus patulis 
.gluma ec. 4-plo brevioribus dense ciliata, ceterum glaberrima v. 
scaberula rarius etiam lateribus pilosula ; II“ lanceolata, abrupte 
mucronato-acuminata, carina infra apicem v. rarius per totum decur- 
sum alato-marginata, more I“ ciliata v. tota pilosa; IV* in '/,—'/; 
superiore acutiuseule biloba, glabra; arista 8—10 mm. longa columná 
glaberrima quam subula 4-plo breviore. Antherz 2 mm. long. 
In insula Ceylon (Thwaites C. P. 956 ex p.). Valde variabilis præser- 
tim indumento, sed varietates satis fixæ vix statuendæ. 
7. D. fuscescens (Trin. in Mém. Acad. Petersb. ser. 6, vol. 2, 
p. 335) ; eulmis 3—4-nodibus, racemis patulis rectis, rhachi undulata 
glabra, gluma P™ et II^ aeutissimis v. acutis. 
Culmi 30—50 cm. alti, graciles, anguste fistulosi, superne longiuseule 
nudi. Vaginz nodis breviter barbatz. Lamin® e basi subzquilata 
in vaginam decurrente lineares, acuminatze, 5—9 em. longa, 3—4 mm. 
lat, rigidulze, nervis lateralibus utrinque 4—5 interjectisque singulis 
secundariis tenuissimis, nullis prominulis, percursz. Racemi bini v. 
terni, 4—10 em. longi, plus minus robusti, pedicellati, fuscescentes, 
parce pilosuli, densiflori; rhachis 0,6 mm. lata depresso-trigona, 
dorso plana 1-nervis facieque convexula glaberrima, margine acutis- 
simo scaberula v. scabra, internodiis 2—3 mm. longis (spicula duplo 
brevioribus) :qualibus ; pedicelli scabri. Spieule violaceo-fuscescen- 
tes, 5—7 mm. longze; 1—8 inferiores cujusvis racemi interdum hebe- 
tate, ad glumas 2 vacuas pusillas muticas redact®, perfectarum 
gluma I” subcoriacea, glabra v. carina ceterum spinuloso-scaberrimo 
