ANDHOIHXiONE.E. 61 



loiifj^er than the first, liuour-ohloTig. keeled above, 5-norvefl ; third 

 shorter tlian the first, broadly oblong, obtuse, 2-nerved; fourth and 

 third equal, lanee-oblong, eiliate, ;3-nerved, 



Florida, Chapman, Garber, Curtiss 3044. 



Subgenus G. Chrysopo(jox Hack. D. C. Monog. Phan. G : 547 

 (188!)). Chr}jsopo(jon Trin. Fund. Agrost. 187 (1820). 



Fertile spikelets l-flo\vered, sessile between two pedicellate, 

 staniinate or barren spikelets at the end of the filiform, unequal, 

 simple or divided branches of a true terminal panicle, with some- 

 times 1-3 pairs of si)ikelets on the branch behnv tlu^ terminal :}. 

 Sessile spikelets compressed, first glume largest, awidess, nu>m- 

 1)ranous and numy-nerved, or more rigid witli the lateral nerves 

 })romiiient and often muricate: second luuTowei'. obscurely keeled, 

 pointed or obtuse or produced into a fine straight awn: third mucli 

 sundler. hyaliiu't fourth linear, entire or t>-t()othed. with a sliort 

 or long awn. (irain com])ressed. Pedicellate spikelets obcom- 

 pressed. awnless or awned. with reduced glumes and usually one 

 staminate flower, sometimes reduced to a small rudiment or want- 

 ing. 



Perennials, excepting A. panrif(tnis,\\\i\\ narrow leaf-blades; 

 mostly limited to tropical regions. 



29. A. pauciflorus (Chapm.) Tlack. 1. c. Sorghum paucijlorum 

 Chapm. Coult. Hot. C.az. 3 : "10 (1878). 



Aumud; culms 80-110 cm. high, compressed, smooth, usually 

 branchiug near the base. Sheaths compressed-keeled, smooth, 

 shorter than the internodes, ]nlose along the margins above, often 

 tiuged with violet; ligule siu)rt. eiliate; blade fiat or becoming con- 

 duplicate, with a broad. siiI)C(»rdate base, attenuate-iiointed, 1'2-18 

 cm. (the up]ier ones 2-3 cm.) long, 5-8 mm. wide, smooth, or the 

 mid-iu'rves setaceous, margins eiliate with hairs from tubercled 

 bases. l*anicle exserted, 14-"*(i cm. long, hi'oadly ovale, very loose, 

 lover rays in twos to ftmrs. very slender, the longest about 7 cm. 

 long. S(>ssil(' spikelets 15-17 nun. long, with a callus G mni. long, 

 densely barbulate with rufons liairs. linear, oblong, obtuse, first 

 glume linn, truncate, margins involute, shining or punctidatc on 

 the back. ()liscnri'lv 5-nei'ved ; second as long as tiK) first, firm. 



