DICOTYLEDONOUS PLANTS 77 



1. N. advena. YELLOW POND LILY, Cow LILY, SPATTERDOCK. 

 Leaves oval or orbicular, rather thick, often downy beneath. Flowers 

 bright yellow, 2-3 in. in diameter, depressed-globular. Sepals 6. 

 Petals thick and fleshy, truncate. Stamens in several rows, anthers 

 nearly as long as the filaments. In slow streams and still water.* 



32. RANUNCULACEJE. BUTTERCUP FAMILY. 



Herbs, rarely shrubs, usually with biting or bitter juice. 

 Leaves radical or alternate (in Clematis opposite ; stem-leaves 

 or involucre whorled in anemone) ; stipules none or adnate to 

 the petiole. Floral organs all distinct and unconnected. 

 Sepals 5 or more (rarely 2-4), falling early, often petal-like. 

 Petals none, or 5 or more (rarely 3). Stamens many. Carpels 

 many, 1-celled ; stigmas simple ; ovules 1 or more. Fruit 

 composed of 1-seeded akenes or many-seeded follicles. Seeds 

 small 



A. 



Flowers irregular. 



With a spur. Delphinium, VII. 



With a hood. Aconitum, VIII. 



B. 



Flowers regular. 



1. Petals present (in c not very unlike the stamens). 



(a) Petals very large and showy. Paeon ia, I. 



(&) Petals small, tubular at the tip. Coptis, IV. 



(c) Petals narrow, spatulate, on slender claws. Actsea, V. 

 (e?) Petals prolonged backward into spurs. Aquilegia, VI. 

 (e) Petals flat, with a little scale at the base, inside. 



Ranunculus, XIII. 



2. Petals none, or very small and stamen-like. 



(a) Sepals yellow. Calfha, II. 



(b) Sepals greenish or white, falling as the flower opens. 



Thalictrum, XIV. 



(c) Sepals white or colored, involucre sepal-like. Hepatica, X. 



(d) Sepals 4. Plants climbing. Clematis, XII. 



