NYMPH^ACE^ 13 



Order III.— NYMPH^EACEiE. 



Flowers regular ; stamens numerous ; stigma sessile 

 on the many-celled ovary. A small order of aquatic 

 plants, usually with large handsome flowers and floating 

 leaves. 



1. Nymph^a, L. 



Sepals 4 ; petals numerous, gradually passing into the 

 stamens. 



N, alba, L., the White Waterlily; in lakes and ponds. 



2. NUPHAR, Sm. 



Sepals 5-6, yellow ; petals and stamens numerous. 



N. hiteuniy Sm., our Yellow Waterlily; in lakes and 

 ponds. N. pumiluin^ Sm., with much smaller flowers, 

 unguiculate petals, and oblong leaves ; rare ; in moun- 

 tain lakes in Switzerland, Vosges, Tirol, and Carinthia. 



Order IV.— PA PAVER AC E^. 



Flowers regular ; sepals 2, deciduous ; petals 4 ; sta- 

 mens indefinite. Herbs with a milky or coloured juice 

 (latex). A small order, belonging chiefly to the temperate 

 zone. 



I. Papaver, L. 



Ovary I -celled, with internal projections to which the 

 very numerous ovules are attached, opening by small 

 pores beneath the sessile persistent stigma. 



Our three species of Poppy, P. Rhceas^ L., dubiuniy L. 

 (including Lecoquii, Lam., and collmum, Bog.), and Arge- 

 mone, L., are cornfield weeds ; also P. hybriduniy L., with 



