EXPLANATION OF PLATE XV. 



BECK^IANNLV. — (1) Inflovcscence of B. erucaifonnis, var., reduced in size; 



(2) a spike, enlarged ; (■'}) a s[)ikelet, and (4) the same opened; (5) the 

 flower. 



EKIOCIILOA. — (1) Inflorescence of E. polystachya, reduced ; (2) a spikelct, 

 enlarged, and (3) the same opened ; (4) the flower o])eiied. 



JlO'VlViiKlAAA. — (1) Portion of tlie spike of P. rugosa, somewhat reduced, 

 and (2) a portion enlarged, with (3) the fertile spikelct and (4) the pedi- 

 celled sterile spikelet of tiie middle joint displaced ; (.5) the fertile sj)ikelet 

 opened; (G) the third empty glume, and (7) the flower. 



AMMOPIIILA. — (1) Inflorescence of A. arundinacea, reduced ; (2) a spike- 

 let, enlarged, and (3) the flower, Avith a hairy rudiment at tlic Iiasc of the 

 palet. 



LEPTOCIILOA. — (1) Inflorescence of L. mucronata, reduced; (2) portion 

 of rhachis of a s])ike, bearing two spikelets ; (3) a 3-floweretl spikelet ; and 

 (4) a flower removed. 



BUCHLOP.— (1) Staminate and (2) pistillate inflorescence of P. dactyloides; 



(3) a staminate spikelct, and (4) one of its flowers removed ; (")) a ])istil 

 late spikelet, enlarged; (G) vertical section of same; and (7) the outer 

 empty glume removed. 



MUNROA.— (1) Inflorescence of M. squarrosa; (2) a spikelet, enlarged ; and 



(3) a flower, opened. 

 SCOLOCHLOA. — (1) Inflorescence of S. festucacea, reduced ; (2) a spikelet, 



enlarged ; and (3) a flower. 

 PUCCINELLIA. — (1 ) Inflorescence of P. maritima, reduced ; (2) a spikelet, 



cr.larged ; and (3) a Ilower. 



