. Éléments de botanique. La botanique, la botanique. 132 éléments de botanique. La grappe et formes tardives. Â Si les feuilles le long de la tige â devenait très naine et rapprocher les fleurs, comme ils le sont fréquemment, une sorte de grappe de fleurs comme celle de la groseille (Fig. 105) ou le lis de la vallée. Cette inflorescence est appelé un racème ; les principaux pédoncule est connu comme le pédoncule ; le peu de tiges de fleurs sont individuels et les pédicelles, petite, plus ou moins comme des feuilles à l'échelle de l'hucts} ; pédoncule sont fréquemment les pédicelles de un cluster sur le plan général

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. 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 class.. 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 work.. Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Gin

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• bookcentury1800
• bookdecade1890
• booksubjectbotany
• bookyear1896