. Botany for agricultural students. Plants. 30 FLOWERS is the catkin in which the flowers, unisexual in t3'pical cases, usually have scaly bracts instead of a true perianth, and the whole cluster falls after fruiting. Catkins are typical of Poplars, Willows, Hickories, and Birches. When the raceme is so short that the compact mass of flowers form a more or less rounded cluster as in Red Clover, then a head is formed. In the Composites there is the special kind of head which is the most highly organ- ized of all flower clusters. The flowers besides often being differ- entiated into two kinds ar
. Botany for agricultural students. Plants. 30 FLOWERS is the catkin in which the flowers, unisexual in t3'pical cases, usually have scaly bracts instead of a true perianth, and the whole cluster falls after fruiting. Catkins are typical of Poplars, Willows, Hickories, and Birches. When the raceme is so short that the compact mass of flowers form a more or less rounded cluster as in Red Clover, then a head is formed. In the Composites there is the special kind of head which is the most highly organ- ized of all flower clusters. The flowers besides often being differ- entiated into two kinds are so compactly arranged as to form a cluster resembling a single flower and the cluster is surrounded by bracts, which form a stnacture known as the involucre. {Fig. 31.). 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 Martin, John N. (John Nathan), b. 1875. New York, John Wiley ; London, Chapman & Hall
Size: 1542px × 1621px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1919
