. The elements of botany for beginners and for schools. Botany. which facilitates the dis[)er- sion of the seeds by the wind (Fig. 412,413). InArbor- Vitaj, the scales of the small cone are few, and not very unlike the leaves. In Cy- press tiiey are very thick at the top and narrow at the base, so as to make a peculiar sort of closed cone. In Juniper and Ked Cedar, the few scales of the very small cone become fleshy, and ripen into a fruit which closely resembles a Section XV. THE SEED. 380. Seeds are the final product of the flower, to which all its parts and offices are subservient.
. The elements of botany for beginners and for schools. Botany. which facilitates the dis[)er- sion of the seeds by the wind (Fig. 412,413). InArbor- Vitaj, the scales of the small cone are few, and not very unlike the leaves. In Cy- press tiiey are very thick at the top and narrow at the base, so as to make a peculiar sort of closed cone. In Juniper and Ked Cedar, the few scales of the very small cone become fleshy, and ripen into a fruit which closely resembles a Section XV. THE SEED. 380. Seeds are the final product of the flower, to which all its parts and offices are subservient. Like the ovule from which it originates, a seed consists of coats and kernel. 381. The Seed-coats are commonly two (320), the outer and the inner. Fig. 414 shows the two, in a seed cut tlirough lengthwise. The outer coat is often hard or crustaceous, whence it is called the Testa, or shell of the seed; the inner is almost al- ways thin and delicate. 382. The shape and the markings, so various in different seeds, depend mostly on the outer coat. Sometimes this fits the kernel closely ; sometimes it is expanded into a winff, as in the Trum- pet-Creeper (Fig. 415), and occasionally this wing is cut up into shreds or tufts, as in the Catalpa (Fig. 416); or instead of a wing it may bear a Coma, or tuft of long and soft hairs, as in the Milkweed or Silkweed (Fig. 417). The use of wings, or downy tufts is to render tlie seeds buoyant. 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 Gray, Asa, 1810-1888. New York : American Book Company
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
