312 MONOCOTYLEDONEJE. ROTTBOELLIA . 
foliorum conf. Volckens, Fl. d. ægypt. arab. Wüste, t. 18, f. 1—2. — 
Perennis. Innovationes extravaginales, hirsuto-squamatz. Culmi in 
terra firma simplices, in terra mobili a basi ramosi, erecti, 30—50 cm. 
alti, graciles, teretiusculi, striati, plus minus scabri v. pubescen- 
tes, infra racemum breviter nudi ibique hirtuli. Vaginz teretes, arctæ, 
inferiores dense aggregate, emortu:z explanat®, diu persistentes, 
superiores internodiis breviores, summa cum lamina brevissima, 
omnes glauez, glaberrimze. Ligula in seriem pilorum soluta. Laminze 
e basi subdilatata a vagina parum distincta lineares, sensim acutatze, 
setaceo-acuminats, vernatione convoluta, adulte plane v. ssepius 
subconvolutze, inferiores 6—20 em. longi, explanatz:e 3—4 mm. latze, 
superiores multo breviores, patentes (innovationum eximie distichze), 
glauc®, glabræ, subtus margineque scaberule, supra scabræ, costa 
media erassissima obtusissima multinervi supra late albolineata (sepe 
plus dimidio laminæ latitudinis occupante) munitze, nervis primariis 
utrinque 3—6 supra prominulis interjectis secundariis 2—3"* non 
prominulis pereurse. Racemus erectus, 6—10 cm. longus, crassus, 
dense albo-lanatus, minus fragilis; articuli spicula sessili '/,—subdu- 
plo breviores, crassi, lineari-subelavati, dorso convexo villosi, facie 
leviter excisa planiuscula glabri, sejuncti apice cavitatem rotundato- 
oblongam profundam externe lana cinctam exhibentes. Spiculze sessi- 
les ad quemvis rhacheos nodum nune solitarie nunc (przesertim in 
racemi parte inferiore) bins (singula ad utrumque pedicelli latus), 
lanceolate, 7—10 mm. long&, pallide virides, rhacheos exeisuram ad 
latera non excedentes; gluma I" subeoriaceo-chartacea, acuminata v. 
rostrata, acumine plus minus longe acuteque bipartito, marginibus 
angustissime inflexis, flexuris a basi ad apicem villis albis densiusculis 
ciliatis, dorso plano glabra, punetato-scabra, tenuiter 7—9-nervis, 
callo anguste annuliformi a reliqua gluma rima separato villis densis 
glumam sub:quantibus barbato, anthesi fere horizontaliter patens. 
Gluma II^ P^ demto acumine zquans, chartacea, ovata, breviter 
acuminata, acute carinata, carina superne longe ciliata, tenuiter 5— 
T-nervis, nervis lateralibus cum medio anastomosantibus ; II^ II^» |. 
æquans, membranacea, ovata, acuta, 3-nervis, glabra, paleam sequi-: 
longam, lanceolatam, acutam, binervem margine inflexam, flexuris 
ciliatis, floremque 5° antheris 3 mm. longis fovens; IV: quam H“ '/; 
brevior, membranacea, ovata, acuta, margine subinvoluta, glabra 
1—3-nervis ; palea ei similis nisi bidentula, binervis. Stigmata linea 
ria, elongata, e media spicula exserta, stylos superantia. Embry 
dimidiam caryopsin zequans. Pedicelli articulis '/, breviores, iis are? 
