. Beginners' botany. Botany. 150 BEGINNERS' BOTANY duce great quantities of pollen, for much of it is wasted. They usually have broad stigmas, which expose large surfaces to the wind. They are usually lacking in gaudy colors and in perfume. Grasses and pine trees are typical examples of anemophilous plants. In many cases cross-pollination is insured because the stamens and pistils are in different flowers (diclinous). Monoecious and dioecious plants may be polli- nated by wind or insects, or other agents (Fig. 204). They are usually wind - pollinated, although willows are often, if not mostly,
. Beginners' botany. Botany. 150 BEGINNERS' BOTANY duce great quantities of pollen, for much of it is wasted. They usually have broad stigmas, which expose large surfaces to the wind. They are usually lacking in gaudy colors and in perfume. Grasses and pine trees are typical examples of anemophilous plants. In many cases cross-pollination is insured because the stamens and pistils are in different flowers (diclinous). Monoecious and dioecious plants may be polli- nated by wind or insects, or other agents (Fig. 204). They are usually wind - pollinated, although willows are often, if not mostly, insect- -^3fi\\\\M V pollinated. The ^\\\ '* ' ^ % v Indian corn is a 5* % monoecious plant. * The staminate Fig. 204. —Flowers of Black Walnut: two pis- flowers are in a tillate flowers at A, and staminate catkins at B. terminal panicle (tassel). The pistillate flowers are in a dense spike (ear), inclosed in a sheath or husk. Each " silk" is a style. Each pistillate flower produces a kernel of corn. Some- times a few pistillate flowers are borne in the tassel and a few staminate flowers on the tip of the ear. Is self-fertili- zation possible with the corn? Why does a " volunteer " stalk standing alone in a garden have only a few grains on the ear ? What is the direction of the prevailing wind in summer ? If only two or three rows of corn are. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bailey, L. H. (Liberty Hyde), 1858-1954. New York, The Macmillan company
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