Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] Capsules; each is made up of five carpels. Indehiscent Fruits. — Among those of most importance to man economically are the dry indehiscent fruits. Such fruits do not open to allow the escape of seeds. Among them are found the grainS; such as wheat, oats, and corn. Many of our most destruc- tive weeds bear indehiscent dry fruits. AcHENE. —The simplest and commonest of all indehiscent fruits is the achene. This we have seen before in
Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] Capsules; each is made up of five carpels. Indehiscent Fruits. — Among those of most importance to man economically are the dry indehiscent fruits. Such fruits do not open to allow the escape of seeds. Among them are found the grainS; such as wheat, oats, and corn. Many of our most destruc- tive weeds bear indehiscent dry fruits. AcHENE. —The simplest and commonest of all indehiscent fruits is the achene. This we have seen before in the buttercup and on the outside of the strawberry. In many flowers, especially those of the great com- posite family (a group of plants containing many of the most nox- ious weeds, as the thistle, dande- lion, sneezeweed, and others), hairlike projections are developed from the upper part of the fruit. These projections (collectively called the pappus) are of use to the fruit because they aid in carrying it to other localities at some distance from the parent plant. Nut. — A nut can usually be recognized by the hard pericarp, or ovary wall, which fits tightly over the kernel. Cross section of '^^^ latter, with its covering, is the true seed. The acorn a pecan nut. and pecan are good examples of nuts. The Brazil nut is The acorn, a nut in which the involucre only partly covers the fruit.
Size: 2685px × 745px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
