Ji6 Memoirs Boiticc P. Bis!iof> Museum 



The Hawaiian species are all perennials belimgini^' lo the sections of the 

 genns having the racemes aggregate at the end of the culms on an exserted 

 peduncle. They have all heen introduced for trial as forage grasses and have 

 escaped from the plots where they were lieing grown. 



Racemes numerous, in whorls or fascicles, scattered along an axis lo to 20 cm. lontj; awns 



a1x)ut I cm. long i. A. intermedius 



Racemes 2 to several, approximate at the summit of the culm; awns more than i cm. Ioul;. 



Culms pubescent below the panicle: spikelets pubescent l)ut not silk}- j. A. nodosus. 



Culms glabrous below the panicle. 



Awns brown ; racemes moderately pilose 3. A. sericeus. 



.\wns pale; racemes densely silky 4. A. saccharoides. 



1, Andropogon intermedius K. r>r. I'mdr. Fl. Nov. Holl. 1:202. 1810. 



Culms erect. 1 to 1.5 meters tall, glabrous, pilose at the nodes: sheaths smooth: blades Hat 

 (ir folded, elongate, about 5 mm. witle, glabrous, pilose around the base; panicle oblong, 10 to 

 20 cm. long, the axis smooth, the branches slender, in whorls, naked below, branching above, 

 the branchlets ajjpressed. pilose at base, bearing short racemes; joints of rachis pilose above, 

 enlargetl and cup-shaped at the ui)per end, about 2.5 mm. long and as long as the pedicel of the 

 sterile floret, the latter pilose on the margins ; sessile spikelet short-pilose at base, narrowly ellip- 

 tic, about 4 mm. long, appressed-pilose, especially below ; glumes about equal : sterile lemma 

 narrow, two-thirds as long as the glumes ; fertile lemma consisting of a slender awn alxjut i cm. 

 long, twisted below, obscurely geniculate above ; sterile or pediceled spikelet consisting of a 

 single elliptic ghnne 3 to 4 mm. long. 



Cultivated ground; introduced. Originally described from Australia. 

 .Molokai: Ivastern end, along edge of taro field, Hitchcock 15079. 



2. Andropogon nodosus ( Willem. ) Nash. N. .\mer. Fl. 17:122. 1912. 



Dichanthiiiiii iiodosiiin Willem. Ann. P>ot. Usteri 18:11. 179C'. 



.4iHli-nf^o}:;oii caricosKs inollicoiniis Hack, in DC. Monogr. Phan. 6:569. 1889. 



Culms erect from a more or less geniculate base, glabrous, i to 1.5 meters tall, pubescent 

 at the nodes : sheaths glabrous ; blades flat, 10 to 20 cm, long, 2 to 6 mm. wide, pilose around the 

 Ijase, scabrous on the upper surface ; panicle of 2 to 5 ])eduncled racemes approximate at the 

 summit of the culm, this and the peduncles densely and softly pubescent ; racemes flexuous, 

 jt, to 8 cm. long, the spikelets crowded, the broad outer glumes of the sessile and pediceled 

 .spikelets imbricate, concealing the rachis and the remainder of the spikelet, the rachis pilose ; 

 sessile spikelet 4 mm. long, short-pilose at base ; outer ghime broad, oblong, rounded at the 

 apex, several-nerved, appressed-pubescent on the lower half, hispidulous on the margin ; second 

 glume narrower than the first, about as long, keeled, glabrous on the back, pubescent along the 

 margin ; sterile lemma very thin, nearly as long as the glumes ; fertile lemma very narrow, con- 

 tinued into a bronze-brown awn 1.5 cm. long, tightly twisted to the first bend, loosely twisted 

 to the second bend, straight beyond. 



Introduced for trial by G. 1'. Wilder antl called Wilder grass. Tropics of 

 Asia. Originally described froiu Alauritius. 



Escaped from grounds of the United States Experiment Station. 

 Oahu; Honolulu, Hitchcock 14071; W'estgate in 1015. 



_V Andropogon sericeus R. Br. Prodr. Fl. Xov. Holl. 201. 1810. 



Culms erect, or decumbent at base, glabrous, pilose at the nodes, 50 to 100 cm. tall; 

 sheaths glabrous : blades flat or more or less involute, often glaucous, scabrous, attenuate- 

 pointed. 10 to 20 cm. long, I to 3 mm. wide, the uppermost verv short : inflorescence of 2 to 



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