126 , NYMPHAEACEAE. 



panulate: sepals oblong to oblong-obovate, 4-5 cm. long: petals oblong, oval, 

 or suborbicular, greenish-yellow and often tinged with orange: fruit conic, 5-7 

 cm. long, erect, the carpels 3-4 cm. long, indehiscent. Common, in woods 

 and on banks. Sum. TULIP-TREE. WHITE-WOOD. YELLOW-POPLAR. 



FAMILY 5. MENISPERMACEAE. MOONSEED FAMILY. 



Perennial vines. Leaves alternate: blades entire or lobed, sometimes 

 peltate. Flowers polygamous or dioecious, in racemose or paniculate cymes. 

 Calyx of 6 sepals, or fewer or more. Corolla of 4-6, or more, petals 

 smaller than the sepals, or wanting. Androecium of 6-12 stamens, or 

 more. Gynoecium of 3-6 distinct carpels, or more. Fruit a berry-like 

 drupe. 



1. MENISPERMUM [Tourn.] L. Vines, with rather large entire or 

 shallow-lobed leaf -blades. Sepals 4-8. Petals. 4-8, with involute sides. Fila- 

 ments clavate. Gynoecium stipitate. Stigmas flabellate. Seed cochleate. 



1. M. canadense L. Stems finely pubescent : leaf -blades 5-20 cm. wide, peltate 

 near the base: flowers greenish-white: sepals oblong or oval, 1.5-2 mm. long: 

 petals with somewhat flabellate blades: drupes bluish-black, about 1 cm. in 

 diameter. Common, in thickets and fence-rows. Sum. MOONSEED. 



FAMILY 6. CABOMBACEAE. WATER-SHIELD FAMILY. 



Aquatic caulescent plants, often mucilage-coated. Leaves alternate or 

 opposite: blades of the submerged ones mostly dissected, those of the 

 floating leaves entire and peltate. Flowers perfect. Calyx and corolla 

 of 3 or 4 sepals or petals each, the latter not larger than the former. 

 Androecium of 3-18 stamens. 



1. BRASENIA Schreb. Stout herbs. Blades of all the leaves entire. 

 Petals narrower than the sepals. Stamens mostly longer than the carpels: 

 filaments filiform. 



1. B. Schreberi Gmel. Stems, and other submerged parts, mucilage-coated: 

 leaf -blades oval, elliptic, or oblong, 5-12 cm. long: sepals and petals linear 

 or linear-lanceolate, 1-1.5 cm. long, dull-purple: mature carpels 5-8 mm. long, 

 the beak angled. Lower Susquehanna valley. Eather rare, in ponds and still 

 water. Sum. WATER-SHIELD. 



FAMILY 7. NYMPHAEACEAE. WATER-LILY FAMILY. 



Aquatic, acaulescent plants, with rootstocks. Leaves with erect or 

 floating blades. Flower terminating a long scape. Calyx of 4-6 sepals. 

 Corolla of numerous petals passing into the stamens. 



Petals small, filament-like : stamens hypogynous. 1. NYMPHAEA. 



Petals as large as the sepals : stamens epigynous. 2. CASTALIA. 



1. NYMPHAEA [Tourn.] L. Plants with erect leaves and yellow flowers. 

 Leaf -blades not peltate, with a sinus at the base. Sepals 5 or 6, concave, con- 

 verging. Petals 10-20, erect, somewhat resembling the filaments. Stamens 

 consisting of 2 narrow anther-sacs on the face of a flat filament. Stigmas 

 united into a disk with radiating stigmatic lines. SPLATTER-DOCK. YELLOW 



POND-LILY. 



