8B. GRAMINA. 149 



1207. Setaria viridis, Beauv. 



Area * (2) 3 4 (^f. * * * * ^i^ 11 * * * 15). 



South limit in Kent, Surrey. [Middlesex ?] 



North limit in Norfolk, Suffolk. [Cambridge ?] 



Estimate of provinces 2. Estimate of counties 4. 



Latitude 51 — 53. Local (Germ.) ijyyQ of distribution. 



Agrarian region. Inferagrarian zone. 



Descends to the coast level, in Thames. 



Ascends to 50 yards, more or less. 



Range of mean annual temperature 50 — 49. 



Denizen. Glareal. This is considered an introduced 

 plant by Mr. Babington, while the Digitaria humifusa is 

 held an unquestioned native. But as both grow together 

 in some of their stations, under similar circumstances, 

 and as the stations for this appear to be at least equally 

 numerous with those for the Digitaria, they are here 

 placed in the same intermediate category between the 

 classes of alien and native plants. Dr. Bromfield would 

 seem to have believed S. viridis a native of England, 

 (Phytol. iii. 1077), and to have expected its discovery in 

 Hampshire. I have actually picked a root or two on the 

 shore below Itchin ferry, near the station of Spartiaa alter- 

 niflora, but deemed it an accidental introduction in that 

 spot. Has occurred on the Inch, at Aberdeen, mtroduced 

 with ballast (Flo. Abred.). Fries deems it " vere indigena !" 

 in Denmark and South Sweden. 



