MICROSCOPIC STRUCTURE OF WEED SEEDS 



507 



Fig. 384. Green Foxtail (Setaria viridis). I, spikelet with ripe fruit, g 1 , lower 



empty glume ; g 2 , upper empty glume ; gf 1 , glume, and p 1 , palet of the 



staminate flower ; gf 2 , glume, and p 2 , palet of fertile flower ; c, caryopsis ; b, 



bristles. II and III. caryopsis enclosed by flowering glume and palet. X 8. 



(After Winton, Conn. Agr. Exp. Sta.) 



elongated cells, pairs of short cells, one isodiametric, probably a 

 hair-scar, the other more or less crescent-shaped, occur here and 

 there, and less frequently stomata and thin-walled one to three- 

 jointed hairs. 2. Mesophyl. Only about the nerves and the basal 



Fig. 385A Fig. 385B 



Fig. 385. Green Foxtail. A. Outer epidermis of the staminate flower; I, at 



the edge ; II, in the middle. X 300. 

 B. Outer epidermis of the glume of the fertile flower, showing the wrinkled 



central portion and the smooth edge. 



(After Winton, Conn. Agr. Exp. Sta.) 



