GRASSES OF OHIO 321 



Iation of the spikelets. Spikelet 2-flowered, one perfect, the other 

 vestigial or rarely staminate ; empty glumes very unequal; sterile 

 lemma often enclosing a hyaline palet ; fertile lemma and palet char- 

 taceous or indurated in fruit; grain free enclosed in the flowering 

 glumes. 



1. Bristles of the inflorescence downwardly barbed ; comparatively inconspic- 

 uous. C. verticillata. 



1. Bristles upwardly barbed. 2 



2. Bristles at the base of the spikelets 5-16, involucrate, yellowish-brown ; in- 

 florescence racemose; inner empty glume snorter than the spikelet. C.glauca. 



2. Bristles at the base of the spikelet 1-3, not involucrate ; inflorescence pan- 

 iculate ; inner empty glume as long as the spikelet. 3 



3. Inflorescence 1-3J/2 in. long. y 2 in. thick or less; bristles green. C.viridis. 

 3. Inflorescence 4-9 in. long, Yz-2 in. thick; bristles usually purple. C. italica. 



1. Chaetochloa verticillata ( L.) Scrib. Yerticillate Foxtail- 

 grass. A tufted annual grass with more or less branched, erect or 

 decumbent stems, 1-2 ft. high, and a dense spike-like green panicle 

 which is somewhat compound and interrupted at the base. Involucral 

 bristles of the inflorescence retrorsely barbed ; outer empty glume 

 1 -nerved, less than one-half as long as the spikelet; fertile lemma 

 abruptly apiculate and obscurely transverse-rugose. 



In waste places and yards. July-Sept. From Europe. Cuya- 

 hoga, Wayne, Jefferson, Franklin, Ross, Montgomery, Warren, Ham- 

 ilton. 



2. Chaetochloa glauca ( L.) Scrib. Yellow Foxtail-grass. An 

 annual grass with compressed, erect or ascending stems, branching 

 at the base, 1-4 ft. high, with glaucous leaves, and a yellowish, com- 

 pact, spike-like panicle. Involucral bristles upwardly barbed, yellow- 

 ish-brown ; spikelets oval, much shorter than the bristles; fertile 

 lemma striate, undulate-rugose, very convex. 



A weed. In cultivated fields and waste places. July-Sept. Gen- 

 eral. From Europe. 



3. Chaetochloa viridis (L.) Scrib. Green Foxtail-grass. An 

 annual tufted grass with simple or branched, erect or ascending 

 stems, \-Sys ft. high, and a rather thick spike-like green panicle with 

 slender upwardly barbed greenish bristles. Spikelets elliptic, much 

 shorter than the bristles; outer empty glume less than one-half as 

 long as the spikelet; fertile lemma only moderately convex, obtuse, 

 striate and faintly wrinkled. 



Often a bad weed. In cultivated fields and waste places. July- 

 Sept. General. Naturalized from Europe. 



4. Chaetochloa italica (L.) Scrib. Italian Millet. An annual 

 grass with erect stems, 2-? ft. high, and thick, compact, compound, 

 nodding panicles, interrupted at the base. Involucral bristles up- 

 wardly barbed, usually purplish; spikelets elliptic, shorter than the 



