ANDROPOGON. ANDROPOGONEE (AUCT. EDUARDO HACKEL). 389 
Guyana gallica (Leprieur); Brasilia pr. Colares (Pappig), Rio 
Janeiro (Glaziou 2738, 2739), etc. ; Paraguay (Bal. 277). l 
Subv. 2. exserens (Hack. 1. e.). Racemi 2—2,5 em. longi, 7—8- 
articulati, basi tantum vaginati. 
Mexico (Karwinsky); Brasilia (Regnell, Riedel). 
Obs. 1. Var. y. primo intuitu ab « et 8 specifice distincta videtur ; 
exstant tamen omnes gradus intermedii, ex gr. Burchell 808 ex p. 
Obs, 2. Andropogon rectirhachis Fourn. Pl. Mex. 2, p. 61 est spe- 
cies dubia. Specimina nempe Müllerianum 2032 et Bourg&anum 2646 
ab auctore citata ad A. condensatum f. paniculatum pertinent, 
Schaffneriamum vero 102 ad A. scoparium; reliqua non vidi. Dia- 
gnosis claudicat, nam « palea inferior ad aristam redacta » in nulla 
Schizachyrii species nedum in speciminis supra citatis invenitur. 
23. A. gracilipes (Hack. in Flora 1885, p. 120); racemis 1,5— 
2,5 em. longis in paniculam subeompositam plus minus densam con- 
gestis; spiculis 8 5 mm. longis lineari-lanceolatis articulum '/, supe- 
rantibus, gluma I" seabro-punctata, callo nudo, foliorum ligula 
brevissima, truncata. 
Innovationes extravaginales, demum valde elongat&, eulmos flori- 
feros zquantes, basi graciles, superne robuste, polyphylle. Culmi 
inferne gracillimi, superne robusti, 50—60 em. alti, compressiuseuli, 
valde foliosi, in '/, superiore tantum ramosi, ramis brevibus, ereetis, 
congestis, primariis 2—3-nodibus secundarios brevissimos confertos 
proereantibus, cunctis panieulam linearem circ. 10—12 cm. longam 
formantibus. Vagins internodia sepius subzquantes. Laminæ acu- 
tiuseulz, superiores vix decrescentes, 4—7 cm. longe, 4 mm. late, 
utrinque leves, margine seabrz. Spathz propric cire. 2 em. longs, 
acute v. mucronat&, peduneulum apice clavatum et urceolatum gla- 
brum plerumque 3-plo superantes. Racemi 4—6-artieulati, rhachi 
undulata ; articuli spieulä 8 '/,—subduplo breviores, crassiuseuli 
(apiee 1 mm. lati), spieulam latitudine subsuperantes, appendice inze- 
qualiter bidentato margine minute ciliolato, dorso punctato-scaber- 
rimi, marginibus ab '/, ad apicem usque laxiuscule et accrescendo- 
eiliati, ciliis summis articulum subsequantibus, basi glabriusculi. 
Spiculæ sessiles pallide virescentes : gluma I^^ coriaceo-chartacea, a 
?/, inferiore v. fere a basi sensim angustata, acuta, subintegra, prseter 
nervos carinales scabros tenuiter 2—3-nervis ; II“, IIT, et IV* glabrze, 
hzc fere ad basin usque fissa; aristæ 9 mm. longæ columna inclusa, 
sübulà inferne subtortä parum brevior. Antherz 3, quarum unal mm., 
