WATER LILY FAMILY 285 



1. NYMPHAEA (Tourn.) L. Yellow Pond Lily, SpATTEn-DocK. 



Flowers yellow. Sepals 5-7, leathery, concave. Petals 10-20, sinull fila- 

 ment-like. Filaments flattened, inserted imder the ovary. Stigmas forming an 

 8-24-radiate disk. Fruit with a leathery pericarp; seeds pendulous. [Nuphar 

 Sibth.] 



Leaves 1-3 dm. long, the sinus extending about one-third their length; petals cuneate to 



oblanceolate. truncate; stigma lO-25-rayed. 



Sepals 9-12; flowers 6-10 cm. in diameter; stamens red, 1. A^. polysepala. 



Sepals usually 6; flowers 4-7 cm. in diameter; stamens yellow. 2, N. variegata. 

 Leaves 5-10 cm. long, the sinus extending fully one-half their length; petals spatulate, 



thin; stigma 7-lO-rayed; flowers about 2.5 cm. in diameter. 3. N. niicrophylla, 



1. N. polysepala (Engelm.) Greene. Leaf-blades oval, 2-3 dm. long, 1.5-2 

 dm. wide, with a narrow or closed sinus; sepals 6-12, yellow, reddish tinged; 

 pe_tals 12-18, cuneate, 1-1.5 cm. long; stigma 15-25-rayed, crenate; fruit about 

 3.5 cm. in diameter, with a constricted neck. Lakes and slow streams: JNIont. — 

 (Black Hills) S.D.— Colo.— Calif.— Alaska, Plain — Suhalp, Ap-Au. 



2. N. variegata (Engelm.) G. S. Miller. . Leaf-blades rounded-ovate or 

 broadly oval in outhne, 1-2 dm. long, 8-15 cm. wide, with a narrow or closed 

 sinus; outer sepals green, the rest with bright yellow edges, red or maroon towards 

 the base within; petals oblanceolate; stigma 10-16-rayed; fruit scarcely con- 

 stricted into a neck. A", americana (Prov.) Mill. & Standi. Lakes and slow 

 streams: Lab. — N.J. — Wyo. — B.C. Plain — SubmonL Je-Au. 



3* N. microphylla Pers. Leaf -blades 3-10 cm. long, oval or ovate, with a 

 very deep sinus; sepals about 5, mostly yellow, 12-15 mm. long; petals 4 mm. 

 long; stigma usually deep red, distinctly lobed; fruit 12-15 mm. in diameter, 

 with a narrow neck. N, Kahniana (Michx.) Sims. Ponds: Newf. — Pa. — 

 Sask. Boreal. Jl-Au. 



2. CASTALIA Salisb. Water Lily, Pond Lily. ' 



Flowers in ours white. Sepals 4. Petals numerous, imbricate in several 

 series, grading into staminodia and stamens. Stamens numerous, epigynous. 



Stigma 12-35-rayed, vdth. a globular projection in the middle. Fruit with a 

 leathery pericarp, maturing under water. Seeds numerous, surrounded b}^ a 

 sack-like aril. [Nymphaea L., in part.] 



1. C, Leibergii Morong. Leaves broadly obovate in outline, 6-10 cm. long, 

 4-6 cm. wide; sinus deep, often extending more than half the length of the leaves; 

 basal lobes acute; flowers 4-6 cm. wide; sepals green outside, elliptic, often 

 acutish; petals 8-10, white, purple-veined, obtuse; stamens 20-30; stigma 7-8- 

 rayed. Ponds: Ida. — w Out. and northward. Mont, — Boreal, Jl-Au, 



Family 48. RANUNCULACEAE. Crowfoot Family. 



w 



Herbs or climbing shrubs. Leaves alternate, except in Clematis^ Viornay 

 and Atragene, simple or compound, without stipules. Flowers regular or 

 irregular. Sepals 3-15, usually green and caducous, or in genera without 

 petals persistent and more or less petaloid, imbricate, or in Clematis^ etc., 

 valvate. Petals as many as the sepals or wanting. Stamens usually many, 

 rarely 5. Carpels numerous or few, distinct, rarely solitary, 1-celled, 1- 

 many-oA^uled, Fruit of achenes, follicles, or berries. 



Carpels l-o soiled; fruit of achenes. 



Petals wanting; sepals often petal-like. 



Sepals imbricate in the bud; leaves all alternate, or only those subtending the 



inflorescence opposite. 

 Flowers subtended b^' opposite or verticillate leaf-like bracts. 



Styles short, not elongating in fruit. 1. Anemont:. 



Styles much elongating in frmt, plumose. 2. Pulsatilla. 



Flowers not subtended by oi>posite or verticillate bracts. 



Leaves ternately compound. 3. Thalictriii. 



Leaves jjalmately cleft. 4. Tkauxvetteria, 



Sepals valvate in the bud; leaves all opposite. 



