9278 : MONOCOTYLEDONEJE. ROTTBOELLIA . 
muriculatis, dorso plano 2—3-nervis, ad nervos obselete verrucosa ; 
Ie quam I™ parum brevior, submembranacea, lanceolata, acuta, 
mutica, 3-nervis, glabra, acute carinata, carina inferne muriculata ; 
II: quam Ir: !/, brevior, lanceolata, acuta, tenuiter 2-nervis, glabra, 
paleam simillimam parum breviorem fovens; IV* secundá subbrevior 
ovato-oblonga, obtusa, l-nervis, glabra; ejus palea eà paullo brevior, 
angustior, acuta, subbinervis, glabra. Antherz 2,5 mm. longe. Pedi- 
celi spieulis sessilibus '/,—'/, breviores, lineari-subelavati, dorso- 
seabri. Spiculz pedicellatze sessilibus simillimz nisi (si neutrze) paullo 
usque !/, breviores, gluma I™ dorso bicostata, costis murieulatis, apice 
distinctius setigera v. aristata. 
Prope Brazzaville ad fl. Congo leg. Thollon (in h. Paris.). 
XIX. ROTTB(ELLIA Linn. fil. Dissert. Nov. Gram. gen. p. 23 (1779), 
Amoen. Acad. 10, p. 22 (1790), Supplem., p. 13, pro parte ; Benth. 
et Hook. Gen. Pl. 3, p. 1129 ampl. 
Racemi subeompositi v. spieze spurie in apice culmi ramorumve 
solitarii, digitati v. paniculati; rhacheos fragilis v. rarissime tenacis 
articuli recte v. suboblique disjungentes, non appendieulati ; pedicelli 
articulis aceumbentes v. cum iis connati. Spieule ad quemvis rha- 
cheos nodum bins, rarissime terns : primaria pedicellata vel inter- 
dum ob pedicellum articulo adnatum juxta v. infra spiculam secunda- 
riam nodi superpositi sessilis ', fertilis v. Z v. raro neutra, semper 
præsens etsi interdum parvula ; secundaria sessilis (rarissime duse) a 
dorso subeompressa 1—(raro) biflora; utriusque gluma I™ subcon- 
vexa v. plana, coriacea (saltem ad carinas marginales), mutiea, obtusa 
v. raro acuminata; II“ chartacea v. membranacea, carinata; II 
hyalina v. membranacea, vacua v. paleam cum v. sine flore Z fovens ; 
IV* hyalina, 1—3-nervis, ejus palea glumam subzquans, hyalina, - 
enervis v. binervis, raro subnulla. Lodieule cuneatæ, truncatæ, ova- 
rium zquantes. Caryopsis late oblonga v. obovato-oblonga v. ellip- 
tica, a dorso subeompressa, embryone caryopseos dimidium superante 
v. totam »quante. 
Gramina habitu vario, utriusque orbis incole. —  Subgenera 
sequentia ad generum dignitatem accedunt. 
1 L * in É » 
Talem racemum subcompositum ob spiculas specie omnes sessiles spicam 
spuriam voco 
