ANDROPOGON. ANDROPOGONEE (AUCT. EDUARDO HACKEL). 439 
Spiculæ sessiles 5—6 mm. longe: gluma I" marginibus anguste 
implicata, dorso lzevis, callo pilis gluma 4—5-plo brevioribus barbato; 
III: enervis; IV* quam II“ parum brevior, lanceolata, basi 3-nervis, 
in '/, superiore bifida, laciniis ciliatis ; palea glumá 3-plo brevior, ovata, 
ciliata. Antherz 2,5 mm. longa, stigmata oblonga. Spiculæ pedicella- 
tæ gluma I^* 3—5-nervis, II® 1—3-nervis, II IT^» æquans ; IV* inter- 
dum plus minus aristata. 
Madagascar centralis (Baron 1807); pr. Tananarivo (Hildebrandt 
4052, 4107). 
Obs. In specim. authent. ovarium in spiculis pedicellatis ad rudi- 
mentum minutum redactum, in A. madagascariensi meo (leg. Hilde- 
brandt), ceterum eum illis omnino conveniente, bene evolutum. 
00. A. tristis (Nees! in herb. berol.); culmo ramoso superne 
hirtulo ; vaginis superne subangustatis ore a culmo plerumque distan- 
tibus, RER planis flaceidis, spiculze sessili gluma P callo breviter 
barbato, IV** arista glabra, raro nulla. 
Rhizoma laxum, innovationibus extravaginalibus inferne plus minus 
horizontaliter repentibus, ibique squamosis, demum ascendentibus. 
Culmi 50—70 em. alti, graciles, compressiusculi v. compressi, leves, 
basi vaginis emareidis dense aggregatis tunicati, e nodis 1—3 supe- 
rioribus ramos solitarios—ternos breves v. elongatos graciles simplices 
infra racemos hirtulos edentes. Vaginæ compresse, inferiores carina- 
tæ, densissime aggregate, omnes glaberrimæ, internodiis breviores, 
summa (spatha) breviter laminifera, raro aphylla. Ligula oblonga, 
2—3 mm. longa, membranacea, glabra sed pilis stipata. Laminæ infe- 
riores 10—15 em. long, 2,5—4 mm. latz, e basi plus minus angus- 
tata lineares, virides, utrinque scaberule v. laeviuscule, margine 
scabr:, basi pilis raris barbat et hinc inde pilis utrinque conspersz, 
costa media tenuicula, I-nervi, supra latiuscule albo-lineata, nervis 
lateralibus non prominentibus. Racemi sæpissime terni, rarius 2—6", 
insequales, 2,5—6 em. longi, laxiusculi, a vagina summa (interdum 
pilosula) parum remoti v. basi vaginati. Spieule sessiles 5—6 mm. 
long& : gluma I» marginibus late implicata, dorso scaberula, callo 
pilis glumá 6-plo brevioribus barbulato; III 2-nervis; IV* secundá 
'/4 brevior, anguste linearis, in !/, superiore biloba, laciniis cuspidatis, 
l-nervis, glabrescens ; palea ovario vix longior. Antherze 2,5 mm. 
longi. Stigmata linearia. Spieulze pedicellate gluma I»: 3—7-nervis, 
IF» 1— 5-nervis, IH: subenervis, IV* bidentata, inter dentes szpe 
mucronata, palea glumam IV* @quans ; ovarium szpissime evolutum, 
raro hebetatum. 
