ii- DESOIIIPTIOK OF PLATES. 



lIiLLiDM. a M. cffusum, am. 6 Spikclet closed, c Splkelet open, d Ovary 

 and pistils. 



AMrmoAEPUM. / A. Purshii, n. m. I Leaf. S Staminate flower, of the pan- 

 icle. S Pistillate flower, of tbe root. 



Panicum. a P. agrostoides, n. m. b Spikclet c P. pauciflorum n. e Spike- 

 let, d Fertile pales, (r Neutral pales. 



Oplisjienus. o O. Crus-galli, dim. a Spikclet m. b Spikolet of /3 muticus. 



Setaeia. a S. viridis. 6 Spikclet m, witli ita bristly involucre, c Spikclet 

 of the same in flo-wer, showing two of the bristles. 



Cenchkus. a C. tribuloidea, the burr-like involucre, b Spikelct c Pales in 

 fruit, d Pales in flower. 



PiiALAttis. a P. aruudlnacea m. b Flower, and the 2 hairy rudiments at base. 

 e P. Canariensis, spikclet. 



Antiioxanthum. a A. odoratum, spikclet m. 6 The 2 awned rudiments, o 

 The perfect flower, 2 pales, 2 stamens, 2 styles. 



HiEiiocHLOA. a H. borealis, n. m. b Spikclet. e Same, with the glumes re- 

 moved, showing the 3 flowers. 



IIoLcus. a H. lanatus, u. m. 6 Spikclet m. e He two flowers separated 

 from the glumes. 



III. 



AiBA. c A. cacspitosa n. m. a Spikclet, 6 Flower, d A. flexuosa, spikelct 

 n. m. e Part of the same magnified. 



Danthonia. a D. spicata n. m. 6 Spikolet m. c Lower pale, d Upper pale. 



AvENA. a A. elatior, spikclet n. m. g Glumes. / Flowers, p A. praeoox, 

 spikclet n. m. b Glumes, c Flowers. 



Teisetum. a T. palustre, spikclet, n. m. 6 Same m. c Pales of the lowest 

 flower, p T. purpurasccns, spikelct, u. m. g Glumes, d A flower, closed, 



Beomus. 5 B. secalinus, spikclet, n. m. « A flower, b B. eiliatus, spikclet 

 before flowering, u. m. c A flower open. 



Teicuspis. « T. seslerioidcs, n. m. u Spikclet. m Lower pale of flower. 

 n Upper pale, st T. striota, spikelct enlarged 2 diameters. 



Uealepis. a U. purpurea, n. m. 6 Spikelct m. c Lower pale, d Grain, 

 « Upper pale. 



Dactylis. a D. glomerata, n. m. b Spikclet in flower. 



KoELEEiA. c K. eristata, n. m. a Spikclet. b Flower. 



Di.\rvKnENA. a D. diandra, n, m. 6 Spikclet. c Flower. 



Festuoa. a F. tenella, spikelct, n. m. b Same m. e F. nutans, spikelct, n. 

 m. d Flower. 



Eatokia. a E. obtusata, spikelet am. b Same m. e Lower flower, d Upper 

 flower, with an empty pedicel. 



Melica. c M. mutica, spikelct n. m. / Pales of a flower. 



rv. 



KRAorosTia. a E. poaenides, spikelet n. m. 6 Same m. e Pales of a flower. 

 <f Grnia. c E. hirsuta, epikolet n. m. f Same m. 



