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Order III. NYMPHLEACEjE. 



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. luteum, Sm., our Yellow Waterlily; in lakes and 

 ponds. N. pumilum, Sm., with much smaller flowers, 

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

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



Order IV. PAPAVERACE^. 



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., dubium, L. 

 (including Lecoquii } Lam., and collinum } Bog.), and Arge- 

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



