13 



41. P. sanguinale, Linn. (Digitaria sanguinale, Scop.) Crab-grass.. 

 Common. 



This is an annnal grass, which, although a native of the Old 

 "World, has become spread over most parts of this country, and in- 

 deed over all tropical countries. It is the most common crab-grass 

 of the Southern States. It occurs in cultivated and waste grounds, 

 and grows very rapidly during the hot summer months. The culms 

 usually rise to the height of 2 or 3 feet, and at the summit have 

 from 3 to 6 slender flower spikes, each from 4 to 6 inches long. 

 The culms are bent at the lower joints, where they frequently take 

 root. In the Texas Exhibit there are specimens of this grass five 

 feet ten inches long. 



Prof. Killibrew, of Tennessee, says : 



It is a fine pasture grass, although it has but few base leaves and forms no sward,, 

 yet it sends out numerous stems or branches at the base. It serves a most useful, 

 purpose in stock husbandry. It fills all our corn-fields, and many persons pull it out, 

 which is a tedious process. It makes a sweet hay, and horses are exceedingly fond 

 of it, leaving the best hay to eat it. 



Professor Phares, of Mississippi, says that the corn and cotton 

 fields are often so overrun with it that the hay which might be se- 

 cured would be more valuable than the original crop : It is some- 

 times mowed from between the rows, sometimes cut across the 

 . ridges with the corn. 



Any good piece of ground that has had this grass matured on it the preceding- 

 year may be plowed and harrowed smoothly and then rolled in May, and it will soon 

 be covered with a rich growth. If the season is favorable two mowings should be- 

 made. 



42. P. scabriusculum, Ell. Southern States. 



43. P. scoparium, Lam. (P. pauciflornm, Ell.?) Massachusetts to 



Oregon. 



44. P. serotinnm, Trin. (Digitaria serotina, Mx., D. villosa, Ell.)' 



In the Southern States one of the kinds of crab-grass. 



; 45. P. stenodes, Gris. (P. anceps, var. strictum, Chapm.) Florida. 



to Texas. 

 46. P. Texanum, Buckley. Texas. Texas millet. 



This grass is a native of Texas, and was first described and named, 

 by Prof. S. B. Buckley in 1866. It is an annual, growing from 2: 

 to 4 feet high, at first erect, then becoming decumbent and widely 

 spreading, sparingly branched, very leafy,, the sheaths and leaves- 



