300 MONOCOTYLEDONEE. ROTTBOELLIA. 
glabra ; II^ I» z:equans, navicularis, carina excentrica in ?/, superiore 
ala lata viridi-nervosa munita, 4—5-nervis, glabra; III* lanceolata, 
aeuta, ciliolata, paleam brevem (sed nullum florem) fovens; IV* 
et ejus palea decrescentes, lanceolatz, enerves, glabri, florem c 
foventes. 
Africa tropica : Angola, prope Malange in fruticetis (Buchner h. 
berol. 36). 
16. R. Afzelii ; spiculis oblongis, terminali ecaudata. 
Culmi arundinacei ultra 1,5 m. alti, erecti, subcompressi, glaber- 
rimi, inferne ramos foliiferos, superne floriferos 1—3-nos longiuseulos 
simplices agentes, superne brevissime nudi, haud elavati. Vaginze 
teretiuseule, arctæ, glaberrimze, summa eum lamina brevi v. in ramis 
rudimentaria. Ligula in seriem ciliorum brevium basi subcontluentium 
soluta. Laminz e basi angustata in vaginam subdecurrente elongate 
lanceolato-lineares, setaceo-acuminat&, usque ad 50 em. longe, 6— 
10 mm. late, plane, rigide, glabrze, subtus læves, supra seaberul®, 
margine scaberrim&, costa media basi crassa multinervi supra late 
albolineata percursæ, nervis lateralibus haud prominentibus. Racemi 
6—8 em. longi, strieti, crassiusculi, pedunculo e vagina summa brevi- 
ter exserto fulti, glabrescentes, pallidi; articuli spieula sessili paullo 
breviores, elavati, erassiusculi (diam. apice 1,5 mm.), dorso convexi, 
facie leviter excisi, margine interiore glabri, exteriore (pedicellum 
spectante) pilis albis mollibus suberectis brevibus ciliati, ceterum 
leves, haud striati, recte disjungentes. Spieule sessiles eum callo 
angustissime annuliformi a reliqua gluma rima profunda distineto 
minute puberulo 7 mm. longs, e basi latiore oblongs, pallids, 
rhacheos cavum superantes; gluma P= obtusa, obtuse bidentata, 
flexuris marginalibus lzevibus superne coriaceo-marginatis, dorso sub- 
convexa, glabra, estriata, punctulis minutissimis scaberula, intus 
multinervis ; II“ primä paullo brevior, coriacea, ovata, truncata, cari- 
nata, carina inferne obtusa, superne ala coriacea truncata erosula 
minuta, glaberrima, 11-nervis ; II II?» æquans, elliptico-lanceolata, 
acuta, hyalina, 3-nervis, marginibus implicatis ciliolatis, cum palea 
simili binervi glabra, floreque 5 antheris 3 mm. longis ; gluma IV* 
II^» gequans, ovata, acuta, hyalina, 3-nervis, nervis ad apicem usque 
productis, glabra, cum palea »quilonga, lanceolata, acuta, tenuissime 
binervi. Styli stigmata linearia purpurea æquantes. Pedicelli articulis 
'/4 breviores, ab iis interstitio lineari-oblongo separati, lineari-elavati, 
plani, latere exteriori articulorum modo ciliati. Spiculæ pedicellat® 
