9. PODOHII^LLACEAE 59 



6. Nelumbonaceae Lindl. — Lotus Family 



1 . Nelumbo Adans. — American Lotus 



(Nelumbium Juss. ) 



A^. lutea (Willd.) Pers. Shallow water and muddy shores, local. 

 July-Aug. 



7. Ceratophyllaceae A.Gray — Hornwort Family 



1 . Ceratophyllum L. — Hornwort 

 L Leaf-divisions linear, rather rigid, flattened, serrate; achenes with 

 a spine on each side at the base; ponds and slow streams, not 



uncommon C. demersum L. 



L Leaf-divisions filifonn, flaccid, entire or with a few short bristles; 

 achenes with 3-5 spines on each side; ponds and slow streams, 



local; Hancock, Henderson, Kankakee, and Ogle counties 



C. echinatum A.Gray 



8. Berberidaceae Torr. & Gray — Barberry Family 



L Berberis L. — Barberry 

 \. Leaves entire; flowers usually solitary, or 2-4; spines usually 

 simple; petals notched; commonly cultivated and occasionally 

 escaped to waste ground and woodlands; native of Japan. 

 Apr.-May. Japanese Barberry B. tliunbergii DC. 



1. Leaves spinulose-serrate; flowers in pendulous racemes. 



2. Leaves with 2-10 teeth on each side; twigs brownish or pur- 

 plish; racemes few-flowered; petals notched; fruit 7-8 mm 

 long; Spring Lake, Tazewell Co., G. C. Curran in 1924. 

 American Barberry B. canadensis Mill. 



2. Leaves with 13-25 teeth on each side; twigs gray; racemes 

 many-flowered; petals entire; fruit 8-12 mm long; escaped 

 from cult, to pastures, edges of woods and waste places, 

 occasional; native of Eur. Apr.-May. European Barberry 

 B. vulgaris L. 



9. Podophyllaceae DC. — Mayapple Family 



1. Leaves simple; flowers solitary, white; petals 6-8. 



2. Leaves 7- 9-lobed; berry yellowish-green, pulpy, 4-5 cm long 



1. Podophyllum 



2. Leaves 2-cleft; capsule obconical, 1.5-2 cm long, opening at the top by 



a lid 2. Jeffersonia 



1. Leaf ternately compound; flowers yellowish-green, in a terminal panicle; 

 sepals 6; petals 6, small, thick, spatulate, gland-like; seeds bluish- 

 black, berry-like, about 8 mm in diameter 3. Caulophyllum 



1. Podophyllum L. — Mayapj)le 

 P. peltatum L. Woods, common. Apr.-May. 



