CERATOPHYLLACEAE (HORNWORT FAMILY) 95 



A Leaves peltate, on an elongated stem; flowers 1-2 cm. wide; carpels distinct; 



pistils 4-18, not dehiscent. W. E. Brasenia schreberi (water shield) 



AA. Leaves not peltate, all basal; flowers 2.5-13.7 cm. wide; carpels united into a 



single dehiscent pistil. 



B. Sepals 4, flat; petals 2-3.5 cm. long, white or pinkish, epigynous. E. — (Gk. 



kastalia = a mythical fountain on Mt, Parnassus.) 



Castalia telragona (small white watee-lily) 



BB. Sepals 8-12, concave; petals i-i. 5 cm. long, yellow, hypogynous. W. C. E. 



— Seeds edible. (White ones were dedicated by the Greeks to the water 



nymphs.) Nymphaea polysepala (yellow pond-lily) 



CERATOPHYLLACEAE (Hoenwort Family) 



Herbs, perennial, aquatic, submerged; stems slender, branching. 

 Leaves whorled; threadlike or stag-horn-like, terminal tuft of leaves 

 sUmy and persisting through the winter. Flowers extremely rare. 

 W. E. — (Gk. keras = a horn, phyllon = a leaf; the leaves branch 



stag-horn-like.) Ceratophyllum demersum (hoenwort) 



RANUNCULACEAE (Buttercup Family) 



Herbs or shrubs, annual or perennial, climbing when shrubby. 

 Leaves alternate or opposite {Clematis) or a single whorl {Anemone), 

 simple or compound; stipules none. Flowers regular or irregular. 

 Sepals 3-15, often petal-like, imbricated (except in Clematis). 

 Petals of about the same number as the sepals, rarely more, 

 rarely none. Stamens 10 to many, hypogynous. Carpels i to 

 many, often separate, iii fruit becoming akenes or follicles or berries. 



A. Leaves either alternate or all basal. 

 B. Flowers spurless or i-spurred; leaves various. 

 C. Flowers regular; leaves various. 

 D. Leaves simple. 



E. Leaves entire; fruit of i-seeded akenes. MYOSURTJS (p. 100) 



EE. Leaves either not entire, or else fruit of several-seeded follicles. 

 F. Petals none. 

 G. Leaves entire or crenate; sepals 5-15; fruit of follicles; follicles several- 

 seeded, not 4-angled. CALTHA (p. 96) 

 GG. Leaves palmately lobed; sepals 4; fruit of akenes; akenes i-seeded, 

 4-angled. W. C. E. — (Honor of E. R. von Trautvetter, a. Russian bot- 

 anist.) Trautvetteria grandis (false bugbane) 

 FF. Petals present. 

 H. Plants glabrous; petals 15-25; fruit of many-seeded follicles. W. C. E. 

 — (German trot = something round; referring to the form of the flower.) 

 Trollius laxus (spreading globe-flower) 

 HH. Plants either pubescent or petals fewer; fruit of i-seeded akenes. 



