Key for Families 



1. Plants grass-like. 



Stems solid, 3 angled, Cyperaceae 34 



Stems hollow, round in cross section, Gramineae 30 



2. Plants not grass-like. 



Flowers inconspicuous. 



Flowers with thin, not greenish bracts, Amaranthaceae 37 

 Flowers greenish, succulent herbs, Chenopodiaccae 37 

 Flowers greenish, 3 sepals enclosing the seed, acrid herbs, 



Polygonaceae 34 

 Flowers conspicuous. 



Succulent plants, Portulaceae 40 



Plants not succulent, acrid, sepals petal-like, 



Polygonaceae 34 

 Plants not succulent, acrid, sepals and petals present, 



Ranunculaceae 40 

 Plants not acrid. 



Stems with swollen joints, . . Caryophyllaceae 37 



Stems with joints not swollen. 



Flowers regular of separate parts. 



Flowers in umbels, Umbelliferae 42 



Flowers not in umbels. 



Pungent herbs, 6 separate stamens, 



Cruciferae 40 

 Bland herbs, stamens in one set, 



Malvaceae 41 



Flowers in one pie ce, Gamopetalous 

 Flowers irregular, stem 4 angled, Labiatae 47 

 Flowers regular, stem not 4 angled. 



Twining plants, Convolvulaceae 45 



Not twining plants. 



Conspicuous flowers not in heads. 



Fruit a berry, Solanaceae 48 



Flowers in heads, Compositae 49 



Flowers inconspicuous. 



Plantgainaceae 49 



