DESCRIPTION OF PLATES 



ILLUSTRATING THE GENERA OF GRAMINE/E, 



I. 



Leersia. a, L. orizoides, a raceme, b, spikelet, an open flower, c, a spikelet 

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



Zizania. — a Z. aquatica, stamiuate flowers, natural size (n. in.), b A staminate 

 flower, enlarged (m). d A pistillate flower, m. with one 6tigma visible and one 

 long-awned pale. 



Agrostis. — a A. vulgaris, spikelet, m. with, glumes and pales, b The flower 

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

 with 1 pale, 3 stamens, and 2 styles. 



Sporobolus. a S. asper, a spikelet m. b The grain, c S. longifolius, spikelet 

 m. d Grain. 



Cin\a. a C. pendula, a spikelet m. open, b C. arundinacea, a spikelet m. open. 



Muhlenbergia. a M. Mexicana, spikelet m. b M. sobolifera, spikelet m. 8 M. 

 sylvatica, spikelet m. w M. Wildenowii, spikelet ni. d M. diffusa, spikelet m. 

 g The 2 small glumes 



Polypogon. a P. Monspeliensis, panicle, diminished (dim.), b A spikelet, 

 with glumes, «fcc. c Flower with pales, stamens and styles. 



Calamagrostis. a C. confinis, spikelet m. b A flower — the 2 pales, ovary and 

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



Alopecurus. a A. aristulatus, 6pikelet m. b Lower pale, e Ovary and 2 

 styles, d A. pratensis, spikelet m. e Lower pale. / A. geniculatus, spikelet m. 



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



Aristida. a A. dichotoma, spikelets n. m. 6 A single spikelet m. c A. pur- 

 purascens, spikelet m. d A. tuberculosa, pale n. m. with its 3 large twisted and 

 bent awns. 



Stipa. a S. avenacea, spikelet. b pale with the long twisted and bent awn, 

 n. m. c Flower, m. -with 3 stamens, ovary, 2 styles. 



II. 



Oavzorsis. a 0. asperifolia, n. m. b Spikelet, m. m O. melanoearpa, spike- 

 let m. showing the black fruit. 



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

 open. d Paspalum sanguinale, n. m. a spike, c A spikelet, showing the glume 

 in front d A pale. 



