WATER LILY FAMILY 285 



1. NYMPHAEA (Toiirn.) L. Yellow Pond Lily, Spatter-dock. 



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

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

 8-2-J-radiate disk. Fruit with a leathery pericarj); seeds pendulous. [Nuphar 

 Sibth.] 



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

 oblanceolate. truncate; stigma 10-25-rayed. 



Sepals 9-12; flowers 0-10 cm. in diameter; stamens red. 1. N. polyscpala. 



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



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



thin; stigma 7-10-rayed; flowers about 2.5 cm. in diameter. 3. A'^. viicrophylla. 



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, yell6w, reddish tinged; 

 petals 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: Mont. — 

 (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 outline, 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 — ■Sabmonl. 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. A^ Kalmiana (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 stamen's. Stamens numerous, epigynous. 

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

 leathery pericarp, maturing under water. Seeds numerous, surrounded by a 

 sack-like aril. [Nijniphaea 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 Ont. and northward. Mont. — Boreal. Jl-Au. 



Family 48. RANUNCULACEAE. Crowfoot Family. 



Herbs or climbing shrubs. Leaves alternate, except in Clematis, Viorna, 

 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 manj^, 

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

 many-ovuled. Fruit of achenes, follicles, or berries. 



Carpels 1-ovuled; fruit of achenes. 



Petals wanting; sepals often petal-like. 



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

 inflorescence opposite. 

 Flowers subtended by opposite or verticillate leaf-Uke bracts. 



Styles short, not elongating in fruit. 1. Anemone. 



Styles nuich olonpating in fruit, plumose. 2. PULSATILL;V. 



Flowers not subtondrd bv oi)i)osite or verticillate bracts. 



Leaves ternaUh- compound. 3. Thalictrum. 



Leaves palmately cleft. 4. Trautvetteria. 



Sepals valvate in the bud ; leaves all opposite. 



