. Elements of botany. Botany; Botany. 1S6 ELEMENTS OF BOTANY. The student should construct such' diagrams for some rather com- plicated flower-clusters lilie those of the grape, horse-chestnut or buck- eye, hardhaok, vervain, or many grasses. 170. Terminal Flowers. Determinate Inflorescence.—The terminal bud of a stem may be a flower-bud. In this case the direct growth of the stem is stopped or determined by the appearance of the flower, hence such plants are said to have a determinate inflorescence. The simplest possible case of this kind is that in which the stem bears but one flower at its
. Elements of botany. Botany; Botany. 1S6 ELEMENTS OF BOTANY. The student should construct such' diagrams for some rather com- plicated flower-clusters lilie those of the grape, horse-chestnut or buck- eye, hardhaok, vervain, or many grasses. 170. Terminal Flowers. Determinate Inflorescence.—The terminal bud of a stem may be a flower-bud. In this case the direct growth of the stem is stopped or determined by the appearance of the flower, hence such plants are said to have a determinate inflorescence. The simplest possible case of this kind is that in which the stem bears but one flower at its summit. 171. The Cyme.—Very often flowers appear from lateral (axil- lary) buds, below the terminal flower, and thus give rise to a flower-cluster called a cyme. This may have only three flowers, and in that case would look very much like a three-flowered umbel. But in the raceme, corymb, and umbel the order of flowering is from below upward, or from the out- side of the cluster inward, because the lowest, or the outermost flowers, are the oldest, while in determinate forms of inflorescence the central flowBr is the oldest, and therefore the order of blossom- ing is from the centre outwards. Cymes are very commonly compound, like those of the elder and of many plants of the pink family, such as the Sweet William and the mouse-ear chickweed (Fig. 114). They may also, as already mentioned, be panicled, thus making a cluster much like Fig. 113 A. t. Fig. H4. — Compound Cyme of Mouse-Ear Chickweed. ij the terminal (oldest) 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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