INDEX OF THE CLASSES, ORDERS, AND GENERA. , P- Ablos 200 Abletineeo 172 Ambrosia 171 Aineiunehlor 155 AmpelApsis 147 Amphiearpsea 143 Amy,- I 170 Arum 200 Aaarmn 190 Aselifiadaeej: 1 — Aarl. plas 1«3 Asparagtis 203 .