WILD -FLOWERS MACG ,B.Sc THE PEOPLE'S B OOKS BIOLOGY LIBRARY ,, *^1 ' THE PEOPLE'S BOOKS WILD FLOWERS WILD FLOWERS BY MACGREGOR SKENE, B.Sc. LECTURER ON VEGETABLE PHYSIOLOGY, ABERDEEN UNIVERSITY LONDON: T. C. & E. C. JACK 67 LONG ACRE, W.C., AND EDINBURGH NEW YORK: DODGE PUBLISHING CO. BIOLOGY LIBRARY CONTENTS PAGE INTRODUCTION ........ 9 WHITE FLOWERS . . . . . . .15 YELLOW FLOWERS .33 ROSE FLOWERS ........ 51 RED FLOWERS 57 PALE PURPLE FLOWERS 59 PURPLE FLOWERS ....... 65 BLUE FLOWERS ........ 75 BROWN FLOWERS .80 GREEN FLOWERS ........ 82 FLOWERS RARELY FOUND OR VERY INCONSPICUOUS . 87 INDEX OF LATIN NAMES ... .89 INDEX OF ENGLISH NAMES . . . . . .91 B30206 vii WILD FLOWERS INTRODUCTION THAT curious characteristic of the human mind which will scarcely let us rest content in the beauty of an object, but forces us to seek out the something concrete with which the beauty is associated, cannot be better exemplified than by the universal desire to put a label on the object of our admiration, be it picture, or mountain, or tree. For most of us the interest of wild flowers lies chiefly in their aesthetic appeal; and yet, though it does not affect the loveliness of the plant, there are few who do not feel their interest quickened by the knowledge of what the flower is called. To enable that great majority of flower-lovers, which has no acquaintance with the technicalities of botany, to acquire that knowledge is the aim of this book. In such short space little more is possible ; but the attempt has been made to indicate in some cases the peculiar interest that a plant may have for mankind, in others some point worthy of remark in its own life. The reader will also observe that plants do not grow at random in any sort of situation, but that they occur in nature in definite communities, one set preferring the river-side, another the woodland, a third the moor or the pasture. Such indications, though quite inadequate, may be sufficient to widen somewhat the interest of our flowers. The number of technical terms has been reduced to a mini- mum, hardly a score of words not in everyday use being em- ployed : the meaning of these will be clear to anyone who has read the following introductory paragraphs. GENERAL STRUCTURE OF THE PLANT Flowering plants are composed of four distinct sets of organs, to each of which is assigned a particular role in the life of the whole. (1) The Root serves to fix the plant firmly in the soil, and to absorb from the soil the water and the mineral salts 9 10 WILD FLOWERS which the plant requires. (2) The Stem bears the leaves and flowers, holds them in advantageous positions, and carries to them water and various nutrient material. (3) The Leaves re- ceive from the root water and mineral substances, and from the air the important gas Carbon dioxide; from these they are able to build up the food of the plant — such substances as sugar and starch. This they do by virtue of their green colouring-matter, which absorbs a large quantity of light, necessary for the carry- ing on of the chemical processes involved in the formation of the food substances. (4) The Flowers have as their special function the reproduction of the plant by means of seed-forma- tion. In reality the flower is a collection of leaves, deeply modified to enable them to perform their new work ; some produce the true reproductive bodies — the pollen-grains and the ovules — others protect these, and aid them in various ways. For our present purpose it is necessary to consider the ex- ternal form only of these different parts : a fuller treatment of their structure, and of the way in which they carry on their work, is to be found in another of the books of this series, Dr. Marie Stopes' Modern Botany. 1. The Root. — Only in comparatively few cases does the root present features of value for the identification of a plant ; of interest are those roots, which serve to store food, and so be- come swollen and tuberous (e.g. orchis). 2. The Stem. — It may be necessary to note whether the stem is branched or without branches — simple. Many stems stand straight up — erect; but frequently we meet with plants the stems of which lie along the ground— prostrate; in yet other cases the stem may support itself on external objects — climb or ramble. 3. The Leaf is typically divided into two parts, the leaf-stalk and the blade; very often, however, there is no stalk, and then the leaf is said to be sessile. The margin of the blade is some- times quite smooth — entire — but usually it is cut into or notched in various ways. If it presents a series pf little teeth pointing forwards, like those of a saw, it is serrate; if the teeth are more irregular and point outwards, it is toothed. Often the cutting is much more profound ; it may go right down to the central vein (mid-rib) of the leaf, so dividing it into a number of smaller leaflets, in which case we have a compound leafj as opposed to a simple leaf — one in which the cutting does not reach the mid-rib. If the cutting, though not deep enough to form a compound leaf, yet divides it very deeply, we have a segmented leaf ; if the cutting is" less marked still, the leaf is said to be lobed. In compound, segmented, and lobed leaves the cutting may take place in two different ways : (1) if the INTRODUCTION 11 leaflets, segments, or lobes radiate out from one point at the apex of the leaf -stalk, the leaf is palm-compound (segmented, &c.) ; (2) if, on the contrary, they arise at the sides of the mid- rib, it is feather 'Compound,