TABLE OF CONTENTS xi 



Page 



maize, 136 — Impervious seed-coverings, 137 — Self-burial, 

 137 — Water-grasses, 138 — Propagation by bulblets, 139 

 — Plant societies, 139 — Mesophytes, 140 — Xerophytes, 

 141— Prairie, 142— Sandy soil, 143— Sand-dunes, 143— 

 Pine-barrens, 144 — Rocks, 144 — Deserts, 144 — Halo- 

 phytes, 146 — Hydrophytes, 146 — Geographical dis- 

 tribution, 147 — Distribution of grasses, 148 — Distri- 

 bution of species, 148 — Circumpolar distribution, 149 — 

 Generic distribution, 149. 



CHAPTER XIV 



Taxonomy or Classification 151-158 



Species, 151 — Genera, 152 — The grass family and its 

 subdivisions, 154 — The two series of tribes, 154 — ^The 

 tribes of grasses, 155 — The more important genera of 

 grasses, 156 — Characters used in classification, 157 — 

 Phylogeny, 157. 



CHAPTER XV 



Tribe 1. Maydeae 159-163 



Tripsacum L., 159 — EuchUena Schrad., 160 — Zea L., 

 IQl—Coix L., 162. 



CHAPTER XVI 



Tribe II. Andro-pogonese 164-173 



Miscanthus Anderss., 166 — Saccharum L., 166 — Eri- 

 anthus Michx., 167 — Subtribe Euandropogoneae, 167 — 

 Andropogon L., 169 — Cymhopogon Spreng., 169 — Holcus 

 L., 170— Classification of the sorghums, 172— Tribe III. 

 Nazieae (Zoysiex), 173 — Tribe IV. Melinideae (Triste- 

 gineae), 175. 



