GRAMINE.E. 



947 



4. Glaucous Panicum. Panicum glaucum, Linn. 



(Fig. 1145.) 



(Setaria, Brit. Fl.) 



An erect annual, very much, like the 

 rough P., but of a paler green ; the 

 spike or spike-like panicle more compact 

 and regularly cylindrical, 1 to 1J inches 

 long, with very numerous projecting 

 bristles. These are but slightly rough 

 with minute erect teeth, so as only to be 

 felt as the spike is pushed upwards 

 through the fingers. Spikelets rather 

 larger than in the rough P. ; the second 

 glume rather shorter than the third, the 

 flowering one marked with numerous 

 transverse wrinkles, visible especially 

 as the seed ripens. 



One of the commonest weeds of cul- 

 tivation throughout the warmer regions 

 of the globe, abundant in southern Eu- 

 rope, less so in central Europe, not ex- 

 tending into Scandinavia. In Britain, 

 only occasionally introduced into south- 

 ern England. FL all summer and autumn. 



Fig. 1145. 



5. Green Panicum. Panicum viride, Linn. (Fi 

 (Eng. Bot. t. 875. Setaria, Brit. Fl.) 



^Closely resembles the glaucous P., but 

 the second and third glumes are both 

 about the same length, and the flowering 

 one has no transverse wrinkles. 



With the same geographical range as 

 the glaucous JP., this is, however, much 

 less common in tropical countries, but 

 more so in central Europe, extending 

 eastward all across Russian Asia, and 

 northward into southern Scandinavia. 

 In Britain, it is also rather better esta- 

 blished in the south of England than 

 the other species, except the glabrous P. 

 Fl. summer and autumn. 



g. 1146.) 



Fig. 1146. 



