EXPLAXATION OF PLATE VII. 



LEERSIA. — (1) Pauicle of L. oryzoides, reduced iu size; (2) a branchlet of 

 the same, with its spikelets, of the natural size; aud (3) au opeu spike- 

 let in flower, enlarged. 



ZIZANIA. — (1) A staminate, and (2) a pistillate flower or spikelet of Z. 

 aquatica ; (3) a magnified pistil with a pair of squamul^e or hvpogynous 

 scales; (4) a grain, and a magnified longitudinal section of the lower 

 part of the same, showing the embryo at the outside of the base of the 

 albumen. 



ALOPECURUS. — (1 ) Part of a plant of A. geuiculatus, in flower ; (2) a few 

 spikelets from the spike-like inflorescence, moderately magnified; (3) an 

 open spikelet in flower, more magnified, and (4) the single flowering 

 glume detached. 



PHLEU]\I. — A detached spikelet of P. pratense, having the flower with its 

 glume and palet raised above the empty glumes, magnified. 



HELEOCHLOA. — (1) Inflorescence of H. scnanoides ; (2) a separate en- 

 larged spikelet; and (3) the same open, in flower. 



SPOEOBOLUS. — (1 ) A spikelet of S. cryptandrus, magnified ; (2) the same, 

 with the flower open, raised above the empty glumes; and (3) the fruit, 

 more magnified, showing the seed loose in the pericarp (utricle). — (4) An 

 enlarged spikelet of E. vaginaflora ; and (5) the same displayed, 



AGROSTIS. — (1) Panicle of A. alba, var. vulgaris, Avith (2) an enlarged 

 open spikelet of the same; also (3) the rough pedicel and glumes of 

 A. scabra, with the flower separated, the latter having no palet. 



