. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. 90 Elements of structural (Fig. 1(>()). If, as in Shepherd's Purse (Fig. 29), the capsule is short and broad, it is called a silic/e. If the capsule opens horizoritdfh/, so that the top comes off like a lid, as in Purslane (Fig. 161), it is a p?/xis. 156. Any dry, one-seeded, indchiscmt fruif, is called an ackenp, of which the fruit of Buttercup (Fig. 14) is an example. In W
. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Plantes; Botanique. 90 Elements of structural (Fig. 1(>()). If, as in Shepherd's Purse (Fig. 29), the capsule is short and broad, it is called a silic/e. If the capsule opens horizoritdfh/, so that the top comes off like a lid, as in Purslane (Fig. 161), it is a p?/xis. 156. Any dry, one-seeded, indchiscmt fruif, is called an ackenp, of which the fruit of Buttercup (Fig. 14) is an example. In Wheat the fruit differs from that of Butter" yiq. \m cup in having a closely fitting and adherent pericarp. Such a fruit is called a carynjms or grain. A nut is usually syncarpous, with a hard, dry peri- carp, A wiv(ji'(l fruit, such as that of the Maple (Fig. 1G2), is called a samai'a or ket/. 157. The Seed. The seed has already been de- scribed as the fertilized ovule. It consists of a nucleus, enveloped, as a rule, in two coats. The outer one, which is the most important, is known as the testa. Occasionally an additional outer coat, called an aril, is found. In the Euonymus of Canadian woods, the aril is particularly prominent in autumn, owing to its bright scarlefc colour. The stalk, by which the seed is attached to the placenta, is the/unicuius, and the scar, formed on the testa where it separates from the seed-stalk, is called the hilum. In the Pea and the Beau this scar is very distinct. 158. Germination of the Seed. When a seed is lightly covered with earth, and supplied with warmth and moisture, ifc soon begins to swell and soften, owing to the absorption of water, and presently bursts its Fig. 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 Macoun, John, 1831-1920; Spotton, H. B. (Henry B
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, booksubjectpl
