WATER LILY FAMILY 285 



1. NYMPHAEA (Tourn.) 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 

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

 Sibth.] 



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

 oblanceolate, truncate; stigma 10-25-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. variegala. 

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



thin; stigma 7-10-rayed; flowers about 2.5 cm. in diameter. 3. N. microphylla. 



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, yeUow, 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 HillsJ S.D.— Colo.— Calif.— Alaska. Plain— Subalp. 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 scared}' con- 

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

 streams: Lab. — -N.J. — Wyo. — -B.C. Plain — -Submont. 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 SaUsb. 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, with a globular projection in the middle. Fruit with a 

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

 sack-like aril. [Nijmphaea 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 man)' as the sepals or wanting. Stamens usually many, 

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

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



Carpels l-o^nlled; 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 by opposite or verticillate leaf-like bracts. 



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



Styles much elongating in fruit, plumose. 2. Puls.\tilla. 



Flowers not subtended by opposite or verticillate bracts. 



Leaves ternately compound. 3. Thalictrum. 



Leaves palmately cleft. 4. Tr.^UTVETTERIA. 



Sepals valvate in the bud; leaves aU opposite. 



