Jones: Flora of Illinois, 66. Berberidaceae 133 



64. Nymphaeaceae DC. — Waterlily Family 



I . Leaves oval or ovate-lanceolate; flowers yellow; stamens hypogynous ; sepals 5-7; 



petals 10-20, small, filament-like 1. Niiphar 



I . Leaves orbicular; flowers white; stamens epigynous ; sepals 4; petals numerous 



- - 2. N^mphaea 



I. NUPHAR Smith 

 (N^mphaea L., ex p.; Nymphozaiilhus Rich.) 

 L Leaves oval; flowers 3-9 cm. in diameter; sepals 6; stamens in 5-7 rows; 

 ponds and slow streams, rare. June-Aug. \N. advena var. brevtfolia 



Standi.] Yellow Pond Lily N. advena Ait. 



L Leaves ovate-lanceolate; flowers 2-3 cm. in diameter; sepals 5; stamens in 4- 

 5 rows. Reported from the Lower Wabash Valley by J. Schneck in 1876. 

 N. sagitttjolia (Walt.) Pursh 



2. Nymphaea L. — Waterlily 

 (Casialia Salisb.) 



1. Flower not fragrant, 10-25 cm. in diameter; petals spatulate; leaves green 

 beneath, prominently veined; rhizome with numerous self-detaching 

 tubers; seeds 3-4.5 mm. long, globose-ovoid; ponds and slow streams, 

 rare. June-Aug. White Waterlily N. tuberosa Paine 



1. Flower very fragrant, 6-12 cm. in diameter; petals elliptical; leaves purplish 

 beneath, indistinctly veined; rhizome without tubers; seeds 1.5-2.5 mm. 

 long, ellipsoid; lakes and shallow ponds, rare, n.e. 111. June-Sept. Fragrant 

 Waterlily N. odorata Ait. 



65. Ceratophyllaceae Gray — Hornwort Family 



1. Ceratophyllum L. — Hornwort 



1. 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. 



1 . Leaf-divisions filiform, flaccid, entire or with a few short bristles; achenes 

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



Patterson; Kankakee De Selm; without locality, Mead in 1829 



C. echinatum Gray 



66. Berberidaceae T. & G. — Barberry Family 



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



2. Leaves 7-9-lob£cl; berry yellowish green, pulpy, many-seeded, 4-5 cm. long 



I. Podophpllum 



2. Leaves 2-cleft; capsule obccnical, many-seeded, 1.5-2 cm. long, opening at the top 



by a lid 2. Jeffersonia 



I.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. CaulophvUiim 



1. Podophyllum L. 

 P. peltatum L. Mayappie or Mandrake. Woods, common, Apr. 



2. Jeffersonia Bart. 



r May 36\C>QS 



/. diphylla (L.) Pers. Twinleaf. Woods, local. Apr.-May. /Hq 



