1 66 



GRAMINEAE. 



VOL. I. 



5. Chaetochloa italica (L.) Scribn. Italian Millet. 

 Hungarian Grass. Fig. 394. 



Panicum italicum L. Sp. PI. 56. 1753. 

 Setaria italica R. & S. Syst. 2: 493. 1817. 

 Chamaeraphis italica Kuntze, Rev. Gen. PI. 768. 1891. 

 Ixophonis italicus Nash, Bull. Torr. Club, 22: 423. 1895. 

 C. italica Scribn. Bull. U. S. Dep. Agr. Agrost. 4: 39. 1897. 



Culms erect, 2-5 tall. Sheaths smooth or scabrous; 

 blades 6'-i or more in length, \'-\\' wide, generally sca- 

 brous ; spikes 4'~9' long, -2,' thick, usually very compound ; 

 spjkelets about ii" long, elliptic, equalled or exceeded by 

 the upwardly barbed generally purplish bristles; first scale 

 less than one-half as long as the spikelet, i-3-nerved; 

 second and third 5~7-nerved; fourth scale equalling or 

 somewhat exceeding the second, finely and faintly trans- 

 verse-rugose, or pitted, striate, only moderately convex; 

 palet of third scale minute or wanting. 



In waste places, escaped from cultivation, Quebec to Minne- 

 sota, south to Florida and Texas. Native of the Old World. 

 German or hungarian millet. Golden or cat-tail millet. July-Sept. 



6. Chaetochloa magna (Griseb.) Scribn. 

 Giant Foxtail-grass. Fig. 395. 



Setaria magna Griseb. Fl. Brit. W. I. 554. 1864. 



C. magna Scribn. Bull. U. S. Dep. Agr. Agrost. 4 : 

 39. 1897. 



Culms 4-i6 tall, stout ; sheaths densely hirsute 

 on the margins, otherwise glabrous ; blades up to 

 3 long, i '-2' wide, very rough on both surfaces ; 

 panicles 8'-2 long, i'-2 thick, nodding above; 

 spikelets i" long, the first scale about i as long 

 as the spikelet, 3-nerved, the second scale as long 

 as the spikelet, 7-nerved, the fourth scale oval, 

 very acute, smooth and shining. 



In swamps, Delaware and Virginia to Florida and 

 Texas ; also in Cuba. July and Aug. 



22. CENCHRUS L. Sp. PL 1049. 1753. 



Annual or perennial grasses with usually flat leaves. Inflorescence in spikes. Spikelets 

 subtended by a spiny involucre which is deciduous with them at maturity. Scales 4; the 

 first hyaline; the second and third membranous, the latter sometimes having a palet and 

 staminate flower in its axil; the fourth chartaceous, subtending a palet of similar structure 

 which encloses a perfect flower. Stamens 3. Styles united below. Stigmas plumose. Grain 

 free, enclosed in the scales. [Ancient Greek name for some grass, probably millet.] 



About 20 species, in tropical and temperate regions. Type species : Cenchrus echinatus L. 

 Body of trie involucre 3 "-4" broad, pubescent with very long hairs, the spines commonly 2 ^"-4" long. 



i. C. tribuloides. 

 Body of the involucre rarely exceeding 2^" broad, pubescent, the spines i l / 2 "-2" long. 



2. C. carolhnanus. 



