106 
POPULAR PLOPA. 
seeds ; but embryos are represented in the figures, to show the student what is 
meant. — For the other class, see p. 203. 
KEY TO THE FAMILIES OR ORDERS OF CLASS I. 
Subclass I. — ANGIOSPEEMS. 
With a regular pistil, and a seed-vessel in which the seeds are formed. See Paragr. 219, 311. 
I. Polypetalous Division. Calyx and corolla both present ; the petals entirely separate. 
A. Stamens more than 10. 
1. Stamens on the receptacle , unconnected either with the calyx , corolla , or ovary. 
Pistils more than one, entirely separate from each other. 
Herbs, with perfect flowers. Page 
Leaves not shield-shaped, generally cut, toothed, or compound, Crowfoot Family, 112 
Leaves shield-shaped, fixed by their middle, Water-shield, 121 
Woody vines, with dioecious flowers, shield-shaped leaves fixed near the edge, Moonseed F. 11 S 
Small trees with perfect flowers, 6 petals, and entire leaves, Custard-Apple F. 118 
Pistils many, grown together one above or over another on a long receptacle, Magnolia F. 117 
Pistils several, sunk in the flat top of a broad receptacle, Nelumbo, 121 
Pistils 3 to 6, the ovaries partly grown together in a circle, making 
A bladdery pod of several cells, Fennel-flower in Crowfoot F. 112 
A several-horned one-celled pod, Mignonette F. 125 
Pistil only one, at least having only one ovary, and that 
Simple and one-celled, only one placenta or seed-bearing part. 
Petals 6 to 9, large. Leaves 1 or 2, many-lobed, May-Apple in Barberry F. 119 
Petals 4 and irregular, or else very small, Crowfoot F. 112 
Compound, with many seeds on a placenta from the bottom of the cell, Purslane F. 130 
Compound, if one-celled, then with two or more seed-bearing lines on the walls. 
Calyx falling when the flower opens ; sepals fewer than the petals, Poppy B’. 122 
Calyx falling after blossoming. Style 1 : ovary several-celled. 
The 5 sepals edge to edge in the bud. Fruit dry, 1-seeded, Linden F. 133 
The sepals overlapping in the bud. Fruit many-celled, Orange F. 134 
Calyx remaining beneath the fruit. 
Leaves with transparent or dark colored dots, all opposite, St. John’s-wort F. 128 
Leaves not dotted. Ovary and pod one-celled, Cistus F. 127 
Leaves not dotted. Ovary several-celled. Aquatic or bog plants. 
Leaves pitcher -shaped. Style umbrella-like, Sidesaddle-Flower F. 121 
Leaves rounded and heart-shaped. Style none, Water-Lily F. 120 
2. Stamens connected with the bottom of the petals, and these borne on the receptacle. 
Filaments united in a pretty long tube or column : anthers kidney-shaped, one-celled, Mallow F. 131 
Filaments united only with the base of the petals : anthers oblong, two-celled, Camellia F. 133 
