132 5IAGNOUACEAE 



3. NYMPHAEA L. 



Stigmatic lines 12-24. i- 1^- 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. iV. Kalmiana. 



1. Nymphaea advena Soland. Large YEi,i<ow Pond LiLY. (Man. 

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

 the Rocky Mts., Fla., Tex. and Vtah.— Pennsylvania : Lackawanna; 

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

 Lancaster ; Franklin ; Huntingdon ; Delaware. 



2. Nymphaea hybrida Peck. Red-diskED Pond Lily. (Man. p. 

 407 ; I. F. y; 1528. ) In ponds and slow streams, Lake Champlain, Ont. 

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

 Pines. 



3. Nymphaea Kalmiana (Michx.) Sims. Small YELLOW "Pond 

 Lily. (Man. p. 407 ; I. F. /. fS^9-) ^" ponds and slow streams, Newf. 

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

 nock ; Lancaster, Collin's Ferry. 



4. CASTALIA Salisb. 

 Rootstocks not tuher-bearing : seeds oblong, 3 mm. long, stipitate, shprterthan 



the aril : flowers fragrant. i. C. odorata, 



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



the aril : flowers odorless. .i. C. luberosa. 



1. Castalia odorata (Dryand) Woodr. & Wood. Pond LiLY. Water 

 Nymph. (Man. p. 407 ; I. F. _/ fSSr.) 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. _/". 1532.) 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. CBRATOPHYLLUM L. 



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

 /. 1536.) In ponds and slow streams, throughout N. Am. except the ex- 

 treme north. — Pennsylvania: Wayke ; 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. 



2. LiRIODENDRON. 



