. The book of grasses; an illustrated guide to the common grasses, and the most common of the rushes and sedges. OutaT(«uYi7^) sc<ilV , Stales. ScaU ^orms ^bt"US€ dcu-tc uppermost) a flower is borne. Scales which enclose a flower are termed flowering scales. These exhibit many interesting peculiarities in their structure, often bearing a bristle-like appendage, called an awn, which is considered by botanists to be a modified leaf-blade. Such awns are straight, bent, or twisted, and either terminate the scales, when they are known as terminal awns, or are borne on the backs of the scale
. The book of grasses; an illustrated guide to the common grasses, and the most common of the rushes and sedges. OutaT(«uYi7^) sc<ilV , Stales. ScaU ^orms ^bt"US€ dcu-tc uppermost) a flower is borne. Scales which enclose a flower are termed flowering scales. These exhibit many interesting peculiarities in their structure, often bearing a bristle-like appendage, called an awn, which is considered by botanists to be a modified leaf-blade. Such awns are straight, bent, or twisted, and either terminate the scales, when they are known as terminal awns, or are borne on the backs of the scales, when the awns are said to be dorsal; that part of the scale below the awn representing the sheath of a leaf, while the portion 0/| of the scale above the awn corresponds to the U ligule. A flowering scale is said to be keeled when it is flattened and folded so that its two edges are brought near together and the mid-vein is prominent as a ridge on the back of the scale. When the veins of a scale are conspicuous the scale is said to be three-nerved, five-nerved, seven- nerved, or nine-nerved, according to the number Oof prominent veins, — Opposite the flowering scale, and with ' it enclosing the flower, is an awnless scale, called the palet, usually thin in texture, and two-nerved, showing two green keels. The palet may be minute or lacking, as in certain of the Bent- grasses, or it may exceed the flowering scale in length, as in Sharp-scaled Manna-grass. Lodicules — At the base of the flower, within its scales, are usually two (rarely three) minute, E thin, and translucent scales, termed lodicules. These will rarely be noticed save at the time of flowering, when, for a short time, they are swollen with sap, and, by pressing the flowering scale and palet apart, cause the opening of the blossom. Lodicules soon wither, and in some grasses are 21. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabil
Size: 2021px × 1236px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishergarde, bookyear1912
