584 Pes MONOCOTYLEDONEJA. ANDROPOGON. 
nam obtusam coriaceam hispidulam depressa, ceterum membranacea, 
3-nervis; III* illis !/s—2-plo brevior, oblonga v. lineari-oblonga, acutius- 
cula, enervis ; IV® arista valida, demum atro-fusca, columna demum 
fulvo- v. rufo-hirtula, medio v. supra medium geniculata, subulam stric- 
tam subconcolorem sequante. Pedicelli spicularum C v. neutrarum breves, 
harum gluma I»* 17—25-nervis (n. 144—146). 
144. A. melanocarpus (Elliott, Sketch, 1, p. 146); vaginis 
. Superioribus secus carinam, spiculisque pedicellatis secus nervum 
medium serie scrobieularum circumvallatarum notatis. — Stipa 
melanocarpa Muehlenb. Descr. uber. p. 183; Cymbopogon melano- 
carpus Spreng. Syst. 1, p. 289; Trachypogon serobiculatus Nees! 
Agrost. brasil. p. 347; Heteropogon acuminatus Trin.! in Mém. Ac. 
Petersb. sér. 6, vol. 2, p. 254; H. Roylei Nees in Steud. Synops. 1, 
p. 367; H. polystictus Hochstett. in Flora 1856, p. 25; H. serobicu- 
latus Fourn. pl. mex. 2, p. 64; Andropogon serobieulatus Kunth 
Enum. 1, p. 507 ; A. polystictus Hochstett. in Schimp. pl. Abyss. un. 
it. 2012; A. polystichus Steud. Synops. 1, p. 369; A. segenensis 
Steud. 1. e. p. 367 (ex deser. excl. cit. Wall. nr. 8801 qui A. triticeus 
Brown). 
Annuus. Culmi 0,5—2 m. alti, glaberrimi, superne repetite ramosi, - 
ramis solitariis — 4"* ramulisque erectis subfastigiatis confertis, 
floriferis totis vaginatis. Vagine subeompress&, glaberrimze, summze 
spathiformes, laxæ, virides, aphylle v. lamina brevissima munitz. 
Ligula 1—4 mm. longa, rotundata, glabra. Laminæ inferiores 15— 
40 em. longs, 0,5—1 cm. late, e basi subangustata lineari-lanceo- 
late, longe acuminatze, utrinque margineque seabr&, glabre v. basi 
fimbriate, planz, late virides, rigidze, costa media crassiuscula 
 plurinervi haud carinata supra late albolineata intus medullosa, 
nervis lateralibus primariis utrinque 2—3 distantibus prominulis, 
 Seeundariis solitariis v. binis parum prominentibus. Cujusvis racemi 
spatha propria longissime acuminata secus carinam scrobiculata, 
racemum (demtis aristis) parum usque ad subduplo superans. Racemi 
intra spatham breviter pedunculati, erecti, compresso-cylindrici, sine 
aristis 4—6 cm. longi; rhacheos articuli inter paria homogama glabri, 
non disjungentes, inter heterogama rufo-hirsuti, facile et obliquissime 
disjungentes, spieula sessili multoties breviores, callo adnati. Paria 
homogama ad basin racemi 1—3. Spieulz sessiles 8 v. 9 cum callo 
3 mm. longo eireumeirca pilis rufis v. demum fuliginosis appressis 
barbato 7—9 mm. longe: gluma I» obsolete 9-nervis, dorso sine 
. sulco; IV* arista validissima 8—12 em. longa, fusca. Palea 0. Lodi- — 
