ANALYTICAL KEY. 



DIVISION 3. Apetalas: petals none; sepals also sometimes wanting; calyx often 

 petaloid. 



A. Ovary containing many ovules. 



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



Ovary and pod superior, placenta central. 



3-celled, 3-valved Mollugo in Caryophyllaceae, 63 



- 1-celled, 5-valved Olaux in Frimulaceae, 73 



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



Pistils many, forming akenes. Calyx petaloid Ranunculaceee, 16 



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



Pistil 1, simple. Calyx petaloid. 



Ovary apparently inferior; leaves opposite, simple Nyctaginaceae, 104 



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



Stipules not sheathing the stem Ro&acese, 49 



Stipules none. Aromatic trees Lauraceae, 106 



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, 120 



B. Flowers with both calyx and corolla. 

 Perianth adherent to the ovary. 



Stamens 1 or 2 on tho pistil. Flowers irregular Orchidaceae, 108 



Stamens 3, anthers extrorse Iridaceae, no 



Perianth free. 



Pistils numerous in a ring Alismaceae 108 



Pistil one; 2-3-celled Liliaceae 1 10 



Pistil 5 to 10 united carpels Alismaceae, 108 



Pistils numerous, in a head (ADDENDA) Alismaceae, 122 



