296 MONOCOTYLEDONEJE. ROTTBOELLIA , 
rantes (diam. 4—5 mm.), dorso convexo eum impressione longitudi- 
nali, Iz ves, recte disjungentes. Spiculz sessiles eum callo 1,5—2 mm. 
longo 10—11 mm. longz, bifloræ; gluma I" integra v. emarginata, 
flexuris marginalibus scabra, dorso plana, obsolete striatula, intus 
multinervis ; II^ P= :quans, chartaceo-coriacea, ovata, acuta, per 
totum decursum acute carinata carina superne scaberula, 11-nervis, 
nervis anastomosantibus ; I I*» &equans, chartacea, ovato-lanceolata, 
acuta, 3-nervis, marginibus implicatis hyalinis, eum palea simili angus- 
tiori chartaceo-coriacea, binervi, marginibus hyalinis late implicatis, 
floreque c? antheris 2 mm. longis; gluma IV* quam II“ '/, brevior, 
hyalino-membranacea, late ovata, convexa, obtusiuseula, tenuiter 
5-nervis, cum palea ei »quilonga, ovato-lanceolata, acuta, hyalina, 
binervi; floris 8 antherz 3 mm. longe, styli stigmata subsuperantes. 
Pedicelli articulis adnati, plani, lzeves. Spiculæ pedicellate 7—8 mm. 
longs, oblong& v. lineari-oblong& ; gluma I^ illi spiculæ sessilis simi- 
lis nisi obtusior, haud alata; II® coriacea, elliptica, acuta, carina 
excentrica, 7—9-nervis; reliqua ut in spiculis sessilibus sed flores 
ambo d. 
In insula Tanna (Forster in h. Vind.), Nova Caledonia (ex Labill., 
Balansa), ins. Moluec. (ex Brogn.). 
12. R. nigrescens (Thwaites En. Pl. Zeyl. p. 364) ; spiculæ ses- 
silis gluma I» ovali-oblonga obtusissima, carinis in '/, superiore latius- 
cule alatis, dorso seriatim foveolata 
Culmi suberecti, graciles, 40—60 cm. alti, teretiusculi, ramos flori- 
feros solitarios raro binos edentes, latere ramigero applanati. Vaginze 
glabrz v. hirtulæ ; laminz e basi subcordata lineari-lanceolatze, 10— 
16 em. long&, 10—15 mm. latz, patentes, rigidulze, demum nigres- 
centes, basi longe eiliatze, ceterum glabrz v. utrinque hirtulze, subtus 
leves, supra margineque scabr&, costa media tenui l-nervi obtusa 
munitz, nervis primariis utrinque 4—5, secundariis tertianisque Cre- 
bris tenuissimis percurs&. Spies spurise 4—6 em. long, erassiusculze, 
livide virescentes et Volsgcenteo, ad apicem vix attonuatuih a 
perfectæ; articuli sessilem 1 et 
tes, (diam. 1,5 mm. ), dorso subeonvexi, viridi-sirind, margineque 
lzeves, recte disjungentes. Spiculæ sessiles eum callo 0,6 mm. longo a 
reliqua gluma depressione lata striata separato 5 mm. longs, ovali- 
oblongz ; gluma I™ emarginata, carinis lzevibus in '/, superiore alis _ 
scariosis rufescentibus erosulis munita, dorso subconvexa, tota super- 
ficie scrobieulis tesselatis in series longitudinales circ. 9 ordinatis 
