DESCRIPTION" OF PLATES 



ILLUSTRATING THE GENERA OF GRAIVilNE/E. 



Leeksia. a, L. orizoides, a raceme, b, spibelet, an open flower, e, a spikelet 

 (flower) of L. lenticularis. d, Flower opeu. e, Ovary and stigmas. 



ZizANiA, — a Z. aquatica, staminate flowers, natural size (n. m.). b A staminate 

 flower, enlarged (m). d A pistillate flower, m. with one stigma visible and one 

 long-awned pale. 



Aqrostis. — a A. vulgaris, epikolet, m. with glumes and pales, b The flower 

 with its 2 pales, 3 stamens and 2 styles, c A. scabra, 2 glumes, ni. d Flower 

 with 1 pale, 3 stamens, and 2 styles. 



Sporobolus. ij S. asper, a spikelet m. i The grain, c S.lougifolius, spikelet 

 m. d Grain. 



CiNNA. a C. pendula, a spikelet m. open, b C. arundinacea, a spikelet m. open. 



MuHiENBEROiA. a M. Mexicaua, spikelet m. b M. sobolifera, spikelet m. » ]\L 

 Bylvatiea, spikelet m. w M. Wildenowii, spikelet m. d M. diffusa, spikelet m. 

 g The 2 small glumes 



PoLiTOGON. u P. Monspeliensis, paniele, diminished (dim.), b A spikelet, 

 with glumes, ifce. c Flower with pales, stamens and styles. 



Calajiageostis. a C. confinis, spikelet m. 6 A flower — the 2 pales, ovary and 

 2 styles, c G. Canadensis, spikelet m. d Grain. 



Alopecueus. a A. aristulatus, spikelet m. b Lower pale, c Ovary and 2 

 etyles. d A. pratensis, spikelet m. c Lower pale. / A. geniculatus, spikelet m. 



Phlecm. a P. pratense, spikelet m. b The 2 pales and ovary. 



Aristida. o a. dichotoma, spikeleta n. m. 6 A smgle spikelet m. c A. pur- 

 puraseens, spikelet m. d A. tuberculosa, pale u. m. with its 3 large twisted and 

 bent awns. 



SiiPA. a S. avenacoa, spikelet. 6 pale with the long twisted and bent awn, 

 am. c Flower, m. with 3 stamens, ovary, 2 styles. 



II. 



Ortzopsis. a 0. asperifolia, am. 6 Spikelet, m. m 0. melanocarpn, spike- 

 let m. showmg the black fruit. 



Paspalum. p p. laeve, n. m. a Spikelet, m. b Spikelet, with its true glume 

 open. d Paspalum sauguinalo, n. m. a spike. <; A spikelet, showing the glume 

 ia front d A pale. 



