WATER LILY FAMILY 9 



2. Stems spineless ; leaves compound 



a. Low, 1-3 dm. high, usually trailing; leaflets 3- 



11, many-toothed B. ripens 



b. Taller, 1-2 m. high, erect; leaflets 3-7, few- 



toothed B. Fremontii 



CERATOPHYLLACEAE HORNWORT FAMILY 



Sepals many, united, petals none, stamens 10-20, ovary 1 -celled, style 

 1 , fruit a beaked achene ; stamens and pistils in different flowers, the latter 

 solitary in the leaf axils; submerged aquatics, with finely cut leaves in 

 whorls of 5-12. 



Ceratophyllum Linne 1753 Hornwort 

 (Gr. keras, keratos, horn, phyllon, leaf) 



Characters of the family. 

 Stems 2-5 ft. long ; leaf lobes thread-like ; fruit ellipsoid C. demersum 



NYMPHAEACEAE WATER LILY FAMILY 

 Represented by the following genus : 



Nymphaea Linne 1753 Yellow Pond Lily 



(Gr. nymphaea, water nymph) 



PL 3, fig. 4. 



Sepals 5-12, yellow, petal-like, petals many, small, stamen-like, stamens 

 many, pistils many, united, the 8-24 stigmas forming a wheel-like disk ; 

 flowers large, single ; aquatic herbs with large roundish heart-shaped float- 

 ing leaves. 

 Flowers 3-? in. wide; sepals 9-12; leaves 4-15 in. long N. polysepala 



BRASSTCALES MUSTARD ORDER 



PAPAVERACEAE POPPY FAMILY 



Sepals 2 or 3, usually falling as the bud opens, petals 4-6, separate, 

 stamens many, pistil 1, stigmas one or several, united into a spreading disk, 

 ovary 1 -celled or incompletely several-celled, fruit a capsule; flowers single 

 or clustered ; herbs with alternate pinnatifid or pinnate leaves and milky or 

 orange-yellow juice. 



1. Stem leafless, 1-flowered ; leaves not prickly Papaver 



2. Stem leafy, several-flowered ; leaves prickly Argemone 



