ARTHRAXON, ^ ANDROPOGONEUE (AUCT. EDUARDO HACKEL). 345 
erecto-patule v. patentissimze, rufæ v. violacex ; gluma I^" ipsa 2 mm. 
tantum longa, sed in rostrum eultriformem v. subuliformem acutissi- 
mum ipsa gluma 5—6-plo longiorem nervo excentrico percursum 
breviter ciliatum sensim abiens, ipsa altero margine late implicata, 
carina alata, altero plano, dorso glabra, enervis; Il“ parum brevior, 
e basi ovato-lanceolata in aristam scabram primo scarioso-margina- 
tam sensim abiens, navicularis, trinervis, lzevis. Reliqua 0. 
In montosis Indie orient.: Nepalia (Royle 393); ad fl. Dschamna 
pr. Etawah (Duthie); Arabiz felicis (Schimper 831) et Hidschas (ad 
Wadi Djara, Ehrenb. in h. berol.); Abyssiniz ad fl. Tacazze (Schimp. 
195 un it. et 1279 mus. Par.), Nubi® pr. Gallabat (Schweinf. 1565, 
1566), et in montibus Ssoturba (Schweinf. 1569); prope Fazogl (Bo- 
riani in h. Vind.). In Capitis Viridis insulis S. Vincente (Schmidt), 
S. Nicalao (Bolle). 
XXV. ARTHRAXON Beauv. Agrost. p. 111; Benth. et Hook. Gen. Pl. 
3, p. 1128; Pleuroplitis Trin. Fund. Agrost. p. 174; Regel in Dull. 
Ac. Petersb. 5 (1866), p. 746; Lucaea Kunth. Revis. Gram. 2, 
p. 489; Batratherum Nees in Edinb. N. Phil. Journ. 18, p. 180; 
Lasiolytrum Steud. in Flora 1846, p. 18; Aleetoridia A. Rich. Tent. 
Fl. Abyss. 2, p. 447 ; Psilopogon Hochst. in Schimp. pl. Abyss. et 
in Rich. Tent. Fl. Abyss. l. c. 
Racemi subcompositi ob spieulas primarias pedicellatas sepe tabes- 
centes ad pedicellos redactas vel ipsos interdum obliteratos spicas sim- 
plices referentes, in apice culmi ramorumve bini, digitati, fascieulati 
v. subpaniculati; rhacheos fragilis articuli filiformes. Spicule ad 
quemvis rhacheos nodum binz v. solitarie, primaria pedicellata raro 
evoluta flore masculo, mutica, sepius neutra v. plane deficiens, secun- 
daria sessilis, uniflora, flore 8 saepissime aristata, sepius a latere 
leviter compressa, demum cum rhacheos articulo aceumbente deci- 
dens: gluma I^* mutica, marginibus non v. leviter implicata; II? 
carinata, mutica v. mucronulata; I hyalina, vacua ; IV* hyalina v. 
basi firmula, integra v. minute bidentula, supra basin dorsi aristam 
gracilem sæpius perfectam raro imperfectam v.ad mucronem redactam 
exserens; palea minuta v. 0. Lodiculæ parvulæ, truncato-cuneatæ. 
Stamina 2—3. Stigmata stylis longiora, prope basin spiculæ exserta, 
rarius inclusa. Caryopsis anguste linearis, bacilliformis, teretiuscula, 
utrinque obtusiuscula, embryone dimidiam caryopsin subæquante. 
