132 MAGNOLIACEAE 



3. NYMPHAEA L. 



Stigmatic lines 12-24. i- N. advena. 



Stigmatic lines 7-12. 

 Petals fleshy : stigmatic lines mostly 9-12 : flowers mostly over 3 cm. thick. 



2. N. hybrida. 

 Petals thin : stigmatic lines mostly 7-9 : flowers mostly less than 3 cm. thick. 



3. N. Kalmiana. 



1. N3miphaea advena Soland. Large Yellow Pond Lily. (Man. 

 p. 407 ; \.V. f. 1527.) In ponds and slow streams, N. B. and N. S. to 

 the Rocky Mis., Fla., Tex. and Utah. — Pennsylvania : Lackawanna; 

 Monroe ; Carbon ; Luzerne ; Northampton ; Bucks ; Chester ; 

 Lancaster ; Franklin ; Huntingdon ; Delaware. 



2. Nymphaea hybrida Peck. Red-disked Pond Lily. (INIan. p. 

 407 \ \.V. f. 152S. ) In ponds and slow streatns. Lake Champlain, Ont. 

 to Pa. and Mich. — Pennsylvania : Pike, Silver Lake ; Monroe, Naomi 

 Pines, 



3. Nymphaea Kalmiana (Michx. ) Sims. Small Yellow Pond 

 Lily. (Man. p. 407 ; I. F. /. fj^g.) In ponds and slow streams, Newf. 

 to Saskatchewan, Pa. and Minn. — Pennsylvania: Monroe, Tunkhan- 

 nock ; Lancaster, Collin's Ferry. 



4. CASTALIA Salisb. 



Rootstocks not tuber-bearing : seeds oblong, 3 mm. long, stipitate, shorter than 

 the aril : flowers fragrant. i. C. odorala. 



Rootstocks tuber-bearing : seeds globular, 6 mm. long, not stipitate, larger than 

 the aril : flowers odorless. 2. C. tuberosa. 



1. Castaliaodorata (Dryand) Woodr. & Wood. Pond LiLY. Water 

 Nymph. (Man. p. 407 ; I. F. /. /JJ/. ) In ponds and slow streams, N. 

 S. to Man., Fla. and La. — Pennsylvania: Wayne; Pike; Monroe; 

 Northampton ; Bucks ; Luzerne ; Carbon ; Lancaster ; Chester ; 

 Dauphin ; Erie. 



2. Castalia tuberosa (Paine) Greene. TuBEROUS White Water 

 Lily. (Man. p. 407; I. F. y. IS32-) In ponds and streams, N. Y. to 

 Mich., N. J., Pa. and eastern Neb. — Pennsylvania: Crawford, Con- 

 neant Lake. 



Family 2. CERATOPHYLLACEAE A. Gray. Hornwort Family. 



1. CERATOPHYLLUM L. 



1. Ceratophyllum demersum L. Hornwort. (Man. p. 409 ; I. F. 

 _/. 1336.) In ponds and slow streams, throughout N. Am. except the ex- 

 treme north. — Pennsylvania: Wayne; Northampton; Dauphin; 

 Huntingdon; Lancaster; Erie; Chester; Delaware. 



Family 3. MAGNOLIACEAE J. St. Hil. Magnolia Family. 



Mature carpels dehiscent : leaf-blades not lobed. i. Magnolia. 



Mature carpels samara-like, indehiscent : leaf-blades 4-lobed. 



3. LiRIODENDRON. 



