DESCRIPTION OF PLATES 



ILLUSTRATING THE GENERA OF GRAMINE/E, 



i. 



LEERSIA. a, L. orizoides, a raceme. 6, spikelet, an open flower, c, a spikelet 

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



ZIZANIA. a Z. aquatica, staminate flowers, natural size (n. in.), b A staminate 

 flower, enlarged (m). d A pistillate flower, in. with one stigtna 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. < A. ecabra, 2 glumes, m. d Flower 

 with 1 pale, 3 stamens, and 2 styles. 



SPOROBOLUS. a S. asper, a spikelet m. b The grain. < 8. longifolius, spikelet 

 m. d Grain. 



CINNA. a C. pendula, a spikelet m. open, b C. arundiuacea, a spikelet m. open. 



MUHLENBEROIA. a M. Mexicana, spikelet m. 6 M. sobolifera, spikelet in. s M. 

 sylvatica, spikelet m. w il. Wildenowii, spikelet m. d M. diffusn, spikelet m. 

 g The 2 small glumes 



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

 with glumes, <fce. c Flower with pales, stamens and styles. 



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

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



ALOPKCURU3. a A. aristulatus, spikelet m. b Lower pale. c. Ovary and '2 

 styles, d A. pratensis, spikelet m. c Lower pale. / A. geuieulatus, spikelet m. 



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



ARISTIDA. a A. dichotoma, spikelets n, m. b A single spikelet in. c A. pur- 

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

 bs'it awns. 



STIPA. a S. avenacea, spikelet. 6 pale with the long twisted and bent awn, 

 a tn. e Flower, m. with 3 stamens, ovary, 2 styles. 



II. 



ORYZOPSIS. a 0. nsperifolia, n. m. 6 Spikelet. m> m 0. tnclanoeavpn, spike- 

 let m. showing the black fruit. 



PASPAUJM. p P, laeve, n. in. a Spikelet, m. 6 Spikelet, with its true glume 

 open. d Paspalum sa-iguinale, n. m. a spike, t A ppikelet, showing the glume 

 in front, d A pale. 



