416 MONOCOTYLEDONEJE. ANDROPOGON. 
cibus raro binodibus tertianumque procreantibus, nodis ramorum plus 
minus barbatis. Spathe proprie angustz, infra apicem parum dila- 
tat, 3—3,5 em. longæ, rufescentes, glabrze, racemorum pedunculum 
communem plerumque æquantes v. parum superantes. Racemi bini, 
breves (1,5—2 em. longi), pro maxima parte v. omnino exserti, densi- 
flori; rhacheos gracillimae subflexuosz articuli spicula sessili duplo 
v. plus duplo breviores, filiformes, villis sordide albidis laxiusculis 
(summis articulo sesquilongioribus) vestiti, ipsa basi nudi. Spiculze 2 
lineari-laneeolatze 5 mm. long, livide et pallide violascentes : gluma 
I»: longe acutata, integra, inter carinas elevatas aculeolato-scabras 
leviter eanalieulato-depressa, callo pilis gluma parum brevioribus 
vestita; II, IIP, IV: ciliolate ; IV* brevissime bidentata, aristam 
imperfectam 7—8 mm. longam e spicula ipsius longitudine tantum 
exsertam inferne semel tortam emittens. Anthera 1,5 mm. longa. 
Pedicelli steriles spieulam 8 subzequantes, lana ipsis subbreviori ves- 
titi, absque ullo rudimento spiculz. 
Florida, in arenosis siccis pr. Jacksonville (Curtiss, N. Am. Pl. 
3632). 
- B. Anthera 3 mm. longa. Gluma I"^ prater nervos carinales nervis 2 intracarinalibus illis 
valde approzimatis scabris percursa (n. 40). 
40. A. aretatus Chapm.! in Bot. Gaz. 1878, p. 20, Fl. South. 
Un. St. Supplem. p. 668 (ex p., nam immixtz sunt note quzedam 
Andropogonis Cabanisii, ab auctore mihi etiam sub A. aretato missi). 
Culmi subrobusti, 60—100 em. alti, in '/, superiore subpaniculato- 
ramosi. Folia viridia, glabra v. (ex Chapm.) pilis albis deciduis vil- 
losi ; vagine striate, læves, superiores dissitze ; lamine acuminatze, 
—25 em. longis, plerumque eomplicatze, aperte 2—3 mm. lat, rigi- 
dulze, subtus lzeves, supra marginibusque scaberulz. Panicula lineari- 
elongata angustissima — 40 cm. longa, laxa, ramis s;pius binis, erec- 
tis, inzequalibus, uninodibus, simplicibus, ad genicula parce barbatis, 
longioribus 1 '/,—2 internodia panicule æquantibus. Spathze proprize 
4—5 em. longe, lineares, acutze, haud carinate, rufze, glabre, pedun- 
culum communem parum superantes. Racemi bini, 2,5—3 em. longi, 
subrobusti, multiartieulati, densiflori; articuli spicula 8 subduplo 
breviores, lineares, oblique disjungentes, acereseendo-villosi, villis 
albis copiosis, summis articulo 1'/, —2-plo longioribus. Spieule 9 
lineari-lanceolate, 5 mm. long, virescentes: gluma I» a '/, inferiore 
angustata, subintegra v. obsolete bimueronulata, marginibus late 
