KEY TO THE NATURAL ORDERS. 
Anthers 4, 2-celled, opposite lobes of perianth. Shrubs and trees. 
Seeds exalbuminous XIX. Proteacee, 
Anthers 1-4, 2-celled. Seeds Mac LXX. Thymelee. 
Anthers 3, united (and 1 sterile filament) LXIX. Proteacee (Conospermu). 
Anthers 2-5, free, 1-celled LXVI. Amarantacee, 
Stamens very numerous. Anthers iw XXVI. Leguminose. 
$$ Carpels combined, 1-celled, with 2 or more afl 
Ovule 1 or several, basal. Leaves opposite, connate . XI. Caryophyllee. 
Ovule 1, basal. Seed 1. Leaves usually alternate LXVII. Chenopodiacee. 
Ovules several. Seeds several . V. Crucifera (Lepidium). 
Tt Flowers unisexual. 
Tree. Leaves opposite. Ovaries oo. Anthers opening 4 valves lll. Monimiacee. 
Trees or shrubs. Leaves alternate. Fruit winged . x XIX. Sapindacee. 
Herbs, with 1-5 stamens opposite lobes of perianth ; Leon, Urticee, 
Shrubs or trees. Leaves opposite. Stamens 2. Fruit drupaceous L. Oleacee. 
Herbs,withalternateleaves, 2-celledanthers, 1-celled ovary,and 2 styles LXVII. Chenopodiaceae. 
Herbs, with 1-celled anthers, 1-celled ovary, and 1 style . . LXVI. Amarantacee(Alternanthera). 
Herbs, with 2-celled anthers, 2-celled ovary, and 2 styles . LXV. Phytolaccez. 
Shrubs, with 2-celled anthers, 3-celled ovary, and discoid stigma LXXII. 
MONOCOTYLEDONS. 
I. Petaloid. Perianth distinct, generally membranous. 
A. Perianth superior. 
a. Terrestrial plants. Flowers hermaphrodite. 
Euphorbiacee ( Beyeria) . 
Perianth irregular, of 6 unegual pieces . i I. Orchidee. 
- Perianth regular. Anthers 1-4, extrorse, SEN the Me i IL. /ridee. 
Perianth regular. Anthers 3, introrse, opposite the seme - . . ME Hemodoracez. 
Perianth regular. Anthers 6, extrorse . e 2. 5. . IX. Melanthacee (Campynema). 
Perianth regular. Anthers6, inHome . . . . . . . . . . TV Hypozidee. 
8. Aquatic plants. Flowers unisexual V. Hydrocharidee. 
B. Perianth inferior. 
a. Perianth of large pieces. 
Stamens 6. Anthers extrorse . . IX. Melanthacee. 
- Anthers introrse. Seed rounded, with a ‘thin TS X. Smilacee, 
Anthers introrse. Seed often flatteried, with a coriaceous, brittle, 
dark testa XI. Liliacee. 
Stamens 3 . i XIII. Xyridee. 
B. Perianth of 6 dini, green, or rary chaff-like p — 
Anthers extrorse. Ovules solitary . . . . . . . VIIL. Alismacee. 
Anthers introrse. Ovules several P XII. Juncee. 
II. Apetaloid. Perianth very obscure or 0. 
Small floating green scales . : VI. Pistiacee. 
Erect marsh plant, with -n soft, thick — 5 . VU. Zyphacee. 
VIII. Zlismacee. 
Caulescent water-plants . . er a 
