304 MONOCOTYLEDONEE. ROTTBOELLIA , 
a, genuina. Gluma I™ basi levis. — R. ophiuroides Benth. 1. c. 
sens. str. 
Australia tropiea : in litore sinus Carpentarize (Brown); Port Darwin 
(Schultz 798) ; Fitzmaurice et Vietoria River(F. Muell.) ; Queensland : 
Rockingham Bay (F. Muell.) ; Nova Guinea: Darnley's Island (Goldie 
ex F. Muell.). 
8, commutata. Gluma I"* supra basin verrucis aliquot notata. — R. 
muricata Benth. Fl. Austral. 7, p. 514 non Retz, excl. synon. omn. — 
Articuli dorso obsoletius carinati. Paniculæ rami breviores, simpli- 
ciores. 
Queensland: Etheridge River (F. Muell.). 
** Lamin® e basi »quilata a vagina vix v. parum distincta lineares, angust® v. angustissima 
(1—7 mm. late). — Americane. (Spec. 20—27.) 
Vaginz teretes v. sühcompresse. Lamins sensim acutate, longe aeuminate, 2—5 mm. late, vernatione 
— adultæ plan v. siccando complicatze, costa media tenui 1-nervi Nro angns ste albolineata 
perc M sce ga: AME arct2, striat®, internodiis breviores. Articuli et omnes spicularum 
rq lab z marginata v. suhbiloba , margine angustissime implicala, dorso plana a, 
callo PEN. annulifo Ser po Pa g 2quans, membranacea, acuta, acute carinata, 4-nervis; "Hr nes 
—À t: ‚eliptico-Ia — acuta, 5 ubenervis v subtrin ervis, vacua; n tertià A 
vior, elli "4-n mig subzqu ilonga ovali-o blonga , 0 
bsc Kd sang wacht Pedicelli par nm arcte appressi, hika mea Papan 
curvuli, dorso plano scaberuli (329—241). 
20. R. eylindrica (Torrey Dot. Whippl. Exped. p. 103) ; gluma 
I"* spieule sessilis ovato-oblonga seriatim foveolata, culmo sub- 
simplici. — Chapm. Fl. South. Un. St. p. 579; Tripsacum eylindri- 
cum Michx. Fl. bor.-am. 1, p. 60. 
Culmi 60—90 em. alti, graciles, teretiuseuli, simplices v. nodo uno 
alterove ramum floriferum brevem agentes, superne elevato-striati. 
Vaginæ glaberrim&, summa cum lamina. Ligula brevissima, truncata, 
membranacea, ciliolata. Lamine 15—30 cm. longi, 2—3 mm. lat, 
virides, subtus glaberrime, supra scabrz v. hispidule, margine 
scaberrimz, nervis primariis utrinque 2—3 prominulis. Racemus 
12—18 em. longus, cylindrieus, erassiusculus, strietus v. leviter cur- 
vatus, a vagina summa satis remotus, viridis v. alutaceus; articuli 
spicula sessili parum breviores, crassi, subclavati, dorso valde convexo 
striati, scaberuli, facie profunde AS, Spiculæ sessiles cum callo 
1 mm longo slaharrimna reliqua gl "— du 6 ! mm. $ 
longæ, cavum exacte (præter apicem) occludentes; gluma p Pes in 
‘l, Superiore ala angusta scariosa parum ultra apicem producta 
munita, dorso subconvexo seriebus longitudinalibus 6—8 foveolarum 
subquadratarum (hine inde obsoletiorum) notata, intus 7-nervis; I 
