504 MISC. PUBLICATION 200, U. S. DEFT. OF AGRICULTURE 



slender, mostly about 15 to 18 cm long, naked for 1 to 4 cm at the 

 base; spikelets appressed, not crowded; lemma about 4 mm long, 

 naked on the midnerve, minutely pilose on margin toward summit; 

 awn about 1 cm long. 21 (C. nealleyi Nash.) Plains, Texas, rare. 

 Chloris prieurii Kunth. Annual; culms 30 to 60 cm tall, often 

 rooting at the lower nodes; blades 2 to 6 mm wide, the upper sheath 

 inflated; spikes 2 to 8, erect, 5- to 8 cm long; 

 fertile lemma 2.5 mm long, narrow, ciliate near 

 the summit, with a delicate awn 7 to 10 mm 

 long; rudiment narrow, of 3 or 4 reduced sterile 

 lemmas each with a long delicate erect awn. 

 O Ballast, Wilmington, N. C., and Mobile, 

 Ala. ; West Africa. 



9. Chloris virgata Swartz. FEATHER FINGER- 

 GRASS. (Fig. 1070.) Annual ; culms ascending 

 to spreading, 40 to 60 or even 100 cm tall; upper sheaths often 

 inflated; blades flat, 2 to 6 mm wide; spikes several, 2 to 8 cm 

 long, erect, whitish or tawny, feathery or silky; spikelets crowded; 

 lemma 3 mm long, somewhat humpbacked on the keel, long-ciliate 

 on the margins near the apex, the slender awn 5 to 10 mm long; 

 rudiment narrowly cuneate, truncate, the awn as long as that of the 



FIGURE 1066. Distribution of 

 Chloris gayana. 



FIGURE 1067. Chloris chloridea. Inflorescences, X 1; florets, X 5. (Silveus 379, Tex.) 



lemma, o (C. elegans H.B.K.) Open ground, a common weed 

 in fields and waste places; Nebraska to Texas and southern Cali- 

 fornia; Maine and Massachusetts, on wool waste; introduced in a 

 few localities in the Eastern States (North Carolina, South Carolina, 

 Missouri); tropical America (fig. 1071). 



10. Chloris polydactyla (L.) Swartz. (Fig. 1072.) Culms erect, 

 wiry, 50 to 100 cm tall; blades as much as 1 cm wide; spikes several 



