ANniK)P(K{ONE.E. 89 



Kunth describes this jirass in his supplomont. iiml at the close 

 remarks that it is liardly distinct from //. tnpmcoides II. B. 



It is also so considered by Ilackel. 



Texas and Arizona, RnthrocTc 038. 



14. (94). Andeopogon L. 8p. PI. 1045 (175.3). DirlianfJiinm 

 Willoni. Ust. Ann. IJot. 18 : 11 (1700). Snnjlutm Pers. Syn. 



1 : 101 (1805). Heterojmion. Pers. Syn. 5i : 533 (1807). Dicdomis 

 IJoanv. Aj^rost. t. 23. /'. 5 (1812). ('//m/jopof/on Sprens^. Pn.<j:ill. 



2 : 14 (1815). f7irj/sopofj(»i Trin. Fnnd. Agrost. 187 (1820). 

 Lopcoccirix Ti-in. Fund. Agrost. 203 (1820). SrJ/t'zarht/n'nm 

 Xees, Agrost. Bras. 331 (182!)). Ifi/pof/i/i/ixm Xeos. Agrost. Hra-^. 

 304(1829). ItJiik/ashuoii Stem]. V\oni.:y.i: 1.229(1850). ayoi- 

 iKniflielia and llyparrhcma Anderss. Nov. Act. Upsal. 2 : 231 

 (185(5). 



At least twenty other synonyms have been discovered. 



Spikelets l-tiowered or empty, in pairs, or by the suppression of 

 1. single, tlie axis often terminated by 2 pedicellate spikelets by the 

 side ot: 1 sessile, either in the alternate notches of the articulate 

 rachis of sim})Ie spikes, or else paniculate, 1 sessile, perfect (or 

 rarely staminatc) and fertile, the otlier pedicellate and barren, 

 either staminate or empty. Glumes in the fertile spikelets 4, the 

 outer 1 the largest, awnless, or with a straight awn, several-nerved, 

 but often almost 2-keeled, with 2 nerves near the margin mucli 

 more prominent than the others; second glume keeled, rarely pro- 

 duced into a short straight awn, third glume much smaller, hyaline 

 and emi)ty. fourth or terminal glume very slender, flexuose and 

 stipe-like at the base, or if dilated hyaline, entire or bifid at the 

 apex, usually witli an awn, either terminal or from the notch, rigid 

 and twisted in the lower part, bent back and very fine abovt' the 

 miildle; palea small, hyaline, or 0. Lodicules euneate. (Jlumes 

 of the barren spikelet 4 or fewer, tlie outer one tlie largest and 

 muny-ncrved, second keeled, third and fourth, wlien ])resent. small, 

 thin and hyaline, all awidess. Stamens .3. Stylos distinct, (irain 

 enclosed, but not adiierent. Culms usually destitute of a hollow 

 inside, hard, often fiattencd. dark red or brown near the nodes. 

 Leaf-blades usually very narrow, ni'ver cordate, pedicels and joints, 

 of the rachis usually ciliate or villous. 



