368 



WEEDS AXD USEFUL PLANTS. 



The abovo cuts represent in detail three different forms of the inflorescence of grasses. FIG. 

 248. A spikelet of a one-flowered grass, a The lower, and ft the upper glume, c The lower 

 palea. d The upper palea having two nerves, e The stamens and pistil, the latter with 

 two plumose stigmas, and two scales at its base. FIG. 249. Spikelet of a three-flowered 

 grass (Anthoxanthum) with one flower only fertile. The parts separated and placed in 

 their relative position below, a and b The lower and upper glumes, c and d The im- 

 perfect florets, each of a single awned palea. e Lower palea of the perfect flower. 

 /Upper palea of the same. The two stamens, h The pistil. FIG. 249.' A spikelet of a 

 several-flowered grass, a and 6 Lower and upper glumes, c d and e Tho flowers placed 

 on alternate sides of a short stem or rachis. /A terminal abortive floret. 



