. Elements of botany. Botany; Botany. 132 ELEMENTS OF BOTANY. The Raceme and Belated Forms. â If the leaves along the stem â were to become very much dwarfed and the flowers brought closer together, as they frequently are, a kind of flower-cluster like that of the currant (Fig. 105) or the lily of the valley would result. Such an inflorescence is called a raceme; the main flower stalk is known as the peduncle ; the little individual flower stalks are pedicels, and the small, more or less scale-like leaves of the peduncle are hucts} Frequently the lower pedicels of a cluster on the general plan
. Elements of botany. Botany; Botany. 132 ELEMENTS OF BOTANY. The Raceme and Belated Forms. â If the leaves along the stem â were to become very much dwarfed and the flowers brought closer together, as they frequently are, a kind of flower-cluster like that of the currant (Fig. 105) or the lily of the valley would result. Such an inflorescence is called a raceme; the main flower stalk is known as the peduncle ; the little individual flower stalks are pedicels, and the small, more or less scale-like leaves of the peduncle are hucts} Frequently the lower pedicels of a cluster on the general plan of the rp,ceme are longer than the upper ones and make a somewhat flat-topped cluster, like that of the hawthorn, the sheep laurel, or the trumpet creeper. This is called a corymb. In many eases, for example the parsnip, the sweet cicely, the gin- seng and the cherry, a group of pedicels of nearly equal length spring from about the same point. This prodiices a flower-cluster called the umbel (Fig. 106). 166. Sessile Flowers and Flower- Clusters.âOften the pedicels are wanting, or the flowers are sessile, and then a modification of the raceme is produced which is called a spike, like that of the plantain (Fig. 107). The willow, alder, birch, poplar, and many other common trees bear a short, flexible, rather scaly spike (Fig. 108), which is called a catkin. The peduncle of a spike is often so much shortened as to bring the flowers into a somewhat globular mass. This is. Fig. 106.â Simple Umbel of Cherry. 1 It is hardly necessary to say that the teacher will And it better in every way, if material is abundant, to begin the study of flower-clusters with the examlDation of typical specimens by the 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, Gin
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1896
