Sub-Kingdom I.—Flowering Plants (Phanerogams), or Spermophytæ.
(1) Angiosperms (anj´ĭ-o-sperms)—Plants producing protected seeds.
The greatest group, the Angiosperms, with over a hundred and thirty thousand species, contains nearly all the plants that yield crops of economic importance to man, or that decorate his gardens, or that feed his sheep or cattle. They have netted-veined leaves. When this group is further examined, there are found to be two well marked divisions—Monocotyledons and Dicotyledons. The first has embryos with only one cotyledon or “seed leaf,” the second has embryos with two. The Angiosperms include over one hundred and thirty thousand species, divided among sixty-two orders, only the most important families of which can be given here.
Order I.—Ranunculaceæ: Herbs or small shrubs; about thirty genera.
Anemone (windflower): Perennial herb. Dry copses. Massachusetts to New Jersey and west to Colorado.
Anemonella (rose anemone): Open woods. Canada to Georgia and west through Mississippi Valley.
Caltha (cowslip, marsh marigold): Perennial herb. United States and Canada.
Clematis (virgin’s bower): Perennial. United States and Canada.
Ranunculus (buttercup, crowfoot): Herb, annual or perennial. Canada, United States and Europe.
Thalictrum (meadow rue): Perennial herb. United States and Canada.