ANALYTICAL KEY. 



Drv'isiox 3. Apetalee: petals none; sepals also sometimes wantnig; calyx often 

 petaloid. 



A. Ovary containing many ovules. 



Ovary and pod inferior, 6-celled. Stamens 6-12 Aristolochiaces3, 104 



Ovary and pod superior, placenta central. 



3-celled, 3-valved Mollurjo in Caryophyllaceae, G3 



1-celled, 5-valvcd Glaux in Primulaceae, 73 



B. Ovary or its cells containing 1 to 8 ovules. 



Pistils many, forming akenes. Calyx petaloid Ranunculacese, IG 



ristil 1, compound, Calyx none. Flowers on a spadix Saururaceae, 107 



Pistil 1, simple. Calyx petaloid. 



Ovary apparently inferior; leaves opposite, simple Nyctaginaceas, 104 



Ovary superior. Stipules sheathing the stem, or none Polygonaceae, 105 



Stipules not sheathing the stem Robaceae, 49 



Stipules none. Aromatic trees Lauraceae, lOS 



Calyx green, persistent. No stipules; 2 or 3 styles Chenopodiaceae, 105 



ANALYTICAL KEY FOR ENDOGENS. 



A. Flowers on a spadix without corolla or calyx. 



Marsh plants with netted -veined leaves Araceae, 



B. Flowers with both calyx and corolla. 

 Perianth adherent to the ovary. 



Stamens 1 or 2 on the pistil. Flowers irregular Orchidaceas, 



Stamens 3, anthers extrorse , Iridaceee, 



Perianth free. 



Pistils numerous in a ring Alismaceae 



Pistil one; 2-3-celled LiliacecB 



Pistil 5 to 10 united carpels • .Alismaceae, 



