528 ~ MONOCOTYLEDONEJE. ANDROPOGON. 
rimi, superne breviter nudi v. toti vaginati. Folia glauca : vaginze inno- 
vationum compressiusculz, culmeæ teretiusculs®, arctze, elevato-striatz, 
nodis brevissime puberulis, internodiis sepe longiores. Ligula plus minus 
protracta 2—6 mm. longa, retusa, glabra, medio membranacea, lateribus 
subcoriaceis fuscescentibus v. subherbaceis virescentibus in vaginam 
decurrentibus ssepius auriculatis, demum lacera. Lamins lineares v. 
lanceolato-lineares, longe acuminat:ze, rigidze, supra elevato-costatse. — 
Neog&i (n. 108—111) 
108. A. nutans (Linn. Spec. ed. 1, p. 1045, non Mantissa 2); 
panicule æqualis ramis primariis secundariisque repetite ramulosis 
ramulis infra spiculam rectis; glumæ T^* plus minus pilos callo 
brevi obtuso; ariste 2—34 mm. longs columna secus spiras glabra 
scabra v. brevissime ciliolata, recta v. medio geniculata, subulam plus 
minus flexuosam subzquante v. ea breviore. Andropogon stipoides 
Trin. in Mém. Ac. Petersb. sér. 6, vol. 2, p. 288; Sorghum nutans A. 
Gray in Man. Bot. N. Un. St. ed. 5, p. 652; Hack. in Mart. et Eichl. 
Fl. bras. vol. 2, pars 3, p. 273. 
Rhizoma crassum, innovationibus extravaginalibus szpe breviter 
repentibus. Culmi 50—150 cm. alti. Laminzx e basi angustata sepius 
semicylindrica lineares v. lanceolato-lineares, planz v. subeonvolutze, 
costa media inferne crassissima multinervi medullosa (etsi szepe canali 
aérifero), nunc superne mox tenerascente nune ultra medium folium 
usque crassa, nervis lateralibus primariis utrinque 6—10 interjectis 
secundariis ternis, omnibus sibi approximatis supra prominentibus. 
Panicule elongatz oblong® v. linearis laxiuscule vel dense rami 
semiverticillos 3—10-radiatos formantes, filiformes v. subcapillares, 
sepe flexuosi, ramuli infra spiculas terminales plumoso-ciliati, infra 
reliquas pilis parcis adspersi, raro glabri. Racemi brevissimi, 1—4- 
articulati, articulis spicula paullo—'/, brevioribus, tenui-filiformibus, 
utrinque breviter atque subzequaliter ciliatis, disjunctis apice cicatrice 
rotunda v. ovali. Spiculæ nitidulze, plus minus coloratæ : gluma P" 
coriacea, lanceolata v. lineari-oblonga, acutata, ipso apice truncatula, 
dorso plano plus minus pilosa, 5—7—9-nervis, marginibus subinvo- 
luta, callo breviter albo-barbato; II“ I paullo superans, obtusa, 
obsolete carinata, 5-nervis; II oblonga, obtusa, I” @quans, enervis, 
longe ciliata; IV* illis paullo brevior, ovato-lanceolata, 3-nervis, 
ciliata, bidentata v. bifida, e sinu aristam emittens sæpissime perfec- 
tam. Palea parvula, ovalis, retusa, interdum obsoleta. Pedicelli 
steriles spicula paullo—duplo breviores, ei appressi, tenui-filiformes, 
pilis albis v. luridis raro leviter violascentibus subsequalibus articulo 
3—4-plo brevioribus pennato-ciliati. 
