Fia. 
41. 
LIST OF ILLUSTRATIONS XVli 
PaGcE 
Calamagrostis scabra. Plant reduced; spikelet, the floret 
raised from the glumes. (U.S. Dept. Agr. Div. Agrost. Bull. 
RMON ERs et se eon eit dek PAS VO a OE Ld Be 205 
42. Ammophila arenaria. Inflorescence and lower portion of plant, 
x4. (U.S. Dept. Agr. Div. Agrost. Buli No. 14).......... 206 
43. Notholcus lanatus. Inflorescence, X%; spikelet, the two 
Hoerets. raised ‘from the elumes, 4 © «5 5 655 o Sen diwnlc See oss 210 
44, Avena fatua. Spikelet and a lower floret, X1............000- 211 
45. Arrhenatherum elatius. Inflorescence, X14; spikelet, X4....... 212 
46. Capriola Dactylon. Plant showing stolons, X23; spikelet, X7. 215 
47. Bouteloua gracilis. Inflorescence, X 1; spikelet, X 10.......... 216 
48. Bulbilis dactyloides. Staminate plant, x 14; spikelet, X4...... paw 
49. Bulbilis dactyloides. Pistillate plant, x 4%; cluster of spikelets 
61. 
52. 
53. 
54. 
55. 
56. 
57. 
58. 
59. 
60. 
61. 
62. 
63. 
RaRMED EERE os OA! 3h Oe eral oa Meecha, ated alee Siete am i earch aca) teh 218 
. Cortaderia argentea. A group of inflorescences greatly reduced; 
glumes of pistillate spikelet (a), florets of pistillate spikelet, 
(b) glumes (c), and florets (d) of staminate spikelet. (U. S. 
Bet Ase. Div. Asrost. bulk Ne. 20}oc.eties. s5cu oboe wees 224 
Eragrostis cilianensis. Plant, reduced; two spikelets, showing 
variable number of florets; portion of rachilla from which 
some of the florets have fallen. (U. S. Dept. Agr. Div. 
Perea t EVENT ES GP 355 cls co eis cae ae as eo Bas atte of Rw Se ayers 225 
Distichlis spicata. Staminate plant (at left) and pistillate 
plant (at right) reduced; pistillate and staminate spikelets... 226 
Dactylis glomerata. Inflorescence, X24; spikelet, X7......... 228 
Poa pratensis. Plant, X 4%; spikelet and floret, X5........... 229 
Festuca elatior. Inflorescence, x 4%; spikelet, K4............. 231 
Bromus inermis. Inflorescence, X 4%; spikelet, X3............ 233 
Lolium multiflorum. Inflorescence, X 14; spikelet, with portion 
SMES SOG 7 PO ee a ih atone wid alg) tm eae Sa Wahi ae a gee are 237 
Agropyron repens. Inflorescence and rhizomes, X 14; spikelet, 
Pa ey cee ee ie he Ia Sa aia Cae bin fate eesti 238 
Triticum dicoccum. Inflorescence (head), X 14; spikelet with 
a disarticulated joint of the rachis, X 2.......00.--seceeees 239 
Triticum xstivum. Inflorescence (head), X 1%; spikelet with 
MOrMOn-O! abtaAcned EACRIS, M2 ois 6s SEES Sain eo ka wees 241 
Secale cereale. Inflorescence (head), X14; spikelet, x 2........ 244 
Hordeum vulgare. Inflorescence (head), X14; cluster of 3 
spikelets, and a single floret from the back showing the 
Partin renee bt eS, Lice bs ta we oo anta Sis aiden ate 245 
Arundinaria macrosperma. Portion of culm with inflorescence 
reduced; floret, palea showing lodicules, and a caryopsis, 
reduced. (U.S. Dept. Agr. Div. Agrost. Bull. No. 20)...... 248 
