306 MONOCOTYLEDONEJE. ROTTBOELLIA . 
Culmi arundinacei, cire. 120. em. alti, erecti, teretes (nisi latere 
ramigero plani), vaginis omnino tecti, e nodis 5 superioribus ramos 
floriferos breves solitarios erectos simplices agentes. Vagin® arct®, 
leeves, estriatze, margine eiliatze, internodia zequantes v. superantes. 
Ligula brevissima, truncata, membranacea, glabra. Lamine 20—40 
cm. longæ, glabr& v. basi ciliatze, subtus leves, margine aculeolato- 
eiliate. Racemi 8—12 em. longi, subcompresso-cylindriei, ereeti, 
strieti, graciles (diam. 1,8 mm.), glabri, virides; articuli spiculam ses- 
silem subæquantes, diam. 1 mm., subelavati, dorso valde convexi, 
facie subconeavi, lzeves, viridi-striati, sejuneti apice cavitatem non 
profundam exhibentes. Spieulz sessiles eum callo annuliformi a reli- 
qua gluma parum distincto glabro 4 mm. longs, lineari-oblongz, 
rhacheos cavum exacte occludentes, glabrze; gluma I™ cartilaginea, 
obtusissima, emarginata, carinis apice anguste scarioso-marginatis 
lævibus, dorso convexo sulcis 3—5 leviusculis v. basi profundioribus 
exarata, in sulcis minutissime pilosula, ceterum lævis, intus 3-nervis; 
reliquæ glabræ: II^ I” æquans, chartacea, oblonga, obtusiuseula, 
marginibus subinvoluta, convexa, carina altero margine approxi- 
mata, 1-nervis; I I” subæquans, oblonga, obtusa, hyalina, 2-nervis ; 
IV* II?" æquans, ovalis, obtusa, 1-nervis; palea parum brevior, 
oblonga, hyalina, enervis. Antherz 1,5 mm. long. Pedicelli articulos 
wquantes, eis arcte appressi, curvato-lineares, graciles, compressi, 
glaberrimi ; spicule pedicellatze tabescentes, 1—1,8 mm. longæ, obtu- 
sæ, ad glumas 2—3 redacta. 
Cuba (Wright 3904). 
í 
XXX Vaginz teretiuscule (superne subcarinate) ; laminæ — lineares, vernatione et etiam adult: 
convolutz, Lm obtusangule, diam. 0,6—1 mm., acuminatz, costa media tenui 4-nervi laterali- 
e3 valde prominentibus percurs& (n. MA ' 23. 
23. R. Ioricata Trin. in Mém. Ac. Petersb., ser. 6, vol. 2, p. 250; 
Hack. in Mart. et Eichl. Fl. bras. 2, pars 3, p. 310, t. 71. 
Tota glabra. Culmi 40—60 em. alti, erecti, teretes, firmi, sub- 
robusti, simplices. Vaginæ aretz, lives, internodiis plerumque bre- 
viores, summa eum lamina. Ligula brevis, truncata, obtuse biauricu- 
lata, glabra. Lamin® juneez, rigidze, 12—24 em. longze, extus gla- 
berrim: intus brevissime puberulz, costa media lateralibus vix cras- 
siore. Racemus solitarius 12—26 em. longus, e vagina summa longe 
exsertus, cylindrieus, eulmo parum erassior, strietus, laxe imbrica- 
tus, viridis; articuli spieulam sessilem :equantes v. superantes, 
lineari-clavati, erassi, dorso valde convexo striati scaberuli, facie pro- — 
