Series I. Microspermæ. At least the inner series of the perianth petaloid. Ovary inferior, unilocular, with 3 parietal placentæ, or rarely 3-locular, with axile placentation. Seeds minute, numerous, without endosperm.
- Order 167. Hydrocharideæ.
- „ 168. Burmanniaceæ.
- „ 169. Orchideæ.
Series II. Epigynæ. At least the inner series of the perianth petaloid. Ovary most often inferior. Endosperm copious.
- Order 170. Scitamineæ.
- „ 171. Bromeliaceæ.
- „ 172. Hæmodoraceæ.
- „ 173. Irideæ.
- „ 174. Amaryllideæ.
- „ 175. Taccaceæ.
- „ 176. Dioscoreaceæ.
Series III. Coronarieæ. At least the inner series of perianth petaloid. Ovary free, very rarely slightly adnate at the base. Endosperm copious.
- Order 177. Roxburghiaceæ.
- „ 178. Liliaceæ.
- „ 179. Pontederiaceæ.
- „ 180. Philydraceæ.
- „ 181. Xyrideæ.
- „ 182. Mayaceæ.
- „ 183. Commelinaceæ.
- „ 184. Rapateaceæ.
Series IV. Calycinæ. Perianth sepaloid, small, rigid, or herbaceous (inner series subpetaloid or small). Ovary free. Endosperm copious.
- Order 185. Flagellarieæ.
- „ 186. Juncaceæ.
- „ 187. Palmæ.
Series V. Nudifloræ. Perianth absent, or reduced to hairs or scales. Ovary superior, carpel solitary, or if many, syncarpous, 1–∞-ovuled. Endosperm most frequently present.
- Order 188. Pandaneæ.
- „ 189. Cyclanthaceæ.
- „ 190. Typhaceæ.
- „ 191. Aroideæ.
- „ 192. Lemnaceæ.