Wayside and Woodland Trees Part 5

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[Ill.u.s.tration: _Pl. 63._ Flowers of White Willow.]

[Ill.u.s.tration: White Willow.]

The White Willow (_Salix alba_) is so called from the appearance of the leaves as the light is reflected from their silky surfaces, which are alike above and below. It is a tree from sixty to eighty feet high, with a girth of twenty feet, covered with thick and deeply fissured bark. The leaves are from two to four inches long, of a narrow elliptical shape.

In the typical form the twigs are olive-coloured, but in the variety _vitellina_ (known as the Golden Willow) these are yellow or reddish. In the variety _caerulea_ the old leaves become quite smooth above, but retain the glaucous appearance of the underside. The White Willow is found as far north as Sutherlands.h.i.+re, but although it is believed to be an indigenous species, most of the modern specimens appear to have been planted. It affords good timber, and the bark is almost equal to that of Oak for tanning. A great number of the old Willows met with in our rambles are partially decayed, a condition frequently the result of lopping large branches, for the wound never heals, and decay setting in at that point, extends down the bole. Upon such decaying specimens one may often find one of the most handsome of our native beetles--the Musk-beetle, with long, slender body and long antennae, all coloured in dark golden green, and diffusing the aroma of a rose.

[Ill.u.s.tration: _Pl. 64._ Bole of White Willow.]



[Ill.u.s.tration: _Pl. 65._ White Willow--winter.]

[Ill.u.s.tration: _Pl. 66._ Almond-leaved Willow--summer.]

[Ill.u.s.tration: _Pl. 67._ Almond-leaved Willow--winter.]

The Almond-leaved or French Willow (_Salix triandra_) is a small tree about twenty feet high, distinguished by its bark being thrown off in flakes. Its slender lance-shaped leaves are smooth green above and glaucous beneath, two to four inches long, and with half-heart-shaped stipules. The male flowers offer another distinguis.h.i.+ng mark in their stamens being three in number. Its habitats are the banks of rivers and streams, and in Osier-beds. It is extensively grown on account of the long, straight shoots produced from the stump when the tree is cut down, which are of great use in wicker-work.

The Bay-leaved Willow (_Salix pentandra_) is met with either as a small upright tree about twenty feet high, or as a shrub eight feet high. Its oval or elliptical leaves are rich green, smooth and sticky on the upper surface, and give out a pleasant fragrance like those of the Bay-tree; they vary from an inch to four inches long, and they may or may not bear stipules, but if these are present they will be egg-shaped or oblong.

The stamens are normally five in each flower, but they vary up to twelve. This is reputed to be of all our Willows the latest to flower. A line drawn through York, Worcester, and North Wales will give roughly its southward range as a native species. South of that line it has been planted; north of it to the Scottish border it is a native. It has been found growing at a height of 1300 feet in Northumberland.

[Ill.u.s.tration: _Pl. 68._ Bay-leaved Willow--summer.]

[Ill.u.s.tration: _Pl. 69._ Bay-leaved Willow--winter.]

[Ill.u.s.tration: _Pl. 70._ Bole of Bay-leaved Willow.]

[Ill.u.s.tration: Sallow.]

The Sallow (_Salix caprea_) is the only other species that can properly be considered as a tree, as it attains to a height of thirty feet, though fifteen to twenty feet is a more common measurement. Its usually egg-shaped leaves vary from almost round to elliptical or lance-shaped, and from two to four inches in length. In the typical form, which occurs chiefly in woods, dry pastures, and hedgerows, they are broad, smooth, and dull-green above, covered with soft white down beneath; the stipules half-kidney-shaped. This is the earliest of all our Willows to flower, and the gold (male) and silver (female) catkins are put out before the leaves. In the country, within a few miles of the larger cities, this can hardly be a desirable species to plant, for on the Sunday before Easter thousands who at no other period exhibit any strong religious tendency journey out to pick some "Palm," as they designate the Sallow bloom, and the rough pruning the Sallows then get must in many cases be disastrous. He who imagines that insect life is suspended until spring is on the verge of summer should visit the woods when the Sallow is in bloom; he will be astonished at the swarms of bees and moths that are collecting the abundant pollen or sipping the nectar provided for them.

Before the bright catkins can be seen the locality of the tree may be known by the loud hum produced by hundreds of pairs of wings. The all but invariable rule among the Willows--as among Oaks, Beech, Birch, Hazel, and Pines--is to depend upon the wind for the transfer of pollen from one tree to the stigmas of another of the same species, but in the Sallow we find a breaking away from what was doubtless the primitive arrangement in all flowering plants, by the bribing with honey of more reliable and less wasteful winged carriers.

The Gray Sallow (_Salix cinerea_) is really a sub-species of _S.

caprea_. It has a liking for moister places than the type, or perhaps it would be more accurate to say that its growth in moister situations has brought about the differences by which it is separated from the parent form. These points are, briefly--the buds and twigs are downy, the leaves smaller and proportionately narrower, the upper surface downy, grey-green beneath; the anthers of the male pale yellow, the capsule of the female smaller.

The Eared Sallow (_S. aurita_) is probably also only another form of _S.

caprea_, distinguished by its small, bushlike proportions (two to four feet high), long branches and red twigs; its small wrinkled leaves, which are usually less than two inches long, are of an almost oblong shape, downy beneath, and with large ear-shaped stipules. Its likeness is much closer to _S. cinerea_ than to the type; it is fond of damp copses and moist places on heaths, where it may be found at considerable elevations. In the Highlands it ascends to 2000 feet.

There are Willows of dwarf habit, some with long straggling branches and more or less prostrate stems, that grow upon heaths. Each has a name under which it has at some time or other been ranked as a distinct species, just as the forms of Bramble and Rose have been. The differences between them are minute, and of little interest save to the advanced scientific botanist, who with his dried specimens spread before him often detects subtle distinctions not apparent to the outdoor student of the living plant. For the purposes of those for whom this volume is intended they may be regarded as one.

Dwarf Silky Willow (_Salix repens_). It is a low bush from six to twelve inches high, the stem lying along the ground. Some of the branches straggle in the same fas.h.i.+on, but those which bear the flowers are more or less erect. The leaf-buds and the young leaves are silky, a condition that usually endures on the lower surface, and in some forms on the upper also. They are broadly or narrowly lance-shaped, varying in the different forms alluded to above; in size they range from a half to one and a half inches in length, and may have lance-shaped stipules, or none at all. The scales of the catkins are yellowish-green or purple, with dark tips. After they have shed their pollen the anthers turn black. One form or other of this species will be found in all parts of the British Islands where there are heaths or commons; in the Highlands it occurs as high as 2500 feet.

Another group of small Willows that form bushes (rarely a small tree) have been united under two species--the Dark-leaved Willow (_Salix nigricans_), and the Tea-leaved Willow (_Salix phylicifolia_). None of them occur south of Yorks.h.i.+re, and the chief distinction between the two species (?) consists in the leaves of _S. nigricans_ turning black when being dried for the herbarium, whilst those of _S. phylicifolia_ do not.

[Ill.u.s.tration: Osier.]

The Osier (_Salix viminalis_). Many of the foregoing Willows, when cut down low and induced to send out long, slender shoots, are known as Osiers, but only two species are botanically regarded as Osiers--this and the Purple Osier (_S. purpurea_). The present species may remain as a shrub or grow into a small tree, thirty feet high, with long, straight branches, which are silky when young, but afterwards become polished.

The leaves vary in length from four to ten inches, and are slenderly lance-shaped, tapering to a point in front, and narrowing into the foot-stalk behind. They have waved margins without teeth, and the upper surface netted with veins, the under surface silvery and silky; stipules narrow lance-shaped. The Osier may be seen in Osier-beds and wet places generally throughout the country as far north as Elgin and Argyll. There are several varieties and hybrids.

[Ill.u.s.tration: _Pl. 71._ Purple Osier--summer.]

The Purple Osier (_Salix purpurea_). In all the other Willows mentioned the stamens, whatever their number, all have the filaments distinct from each other. In this species alone the filaments of the two stamens are more or less united. The Purple Osier gets its name from the red or purple bark which clothes the thin but tough twigs. It is a shrub, and grows from five to ten feet high. The leaves, which are rather thin in texture, are from three to six inches long, of slender-lance-shape, with toothed edges, smooth and glaucous on both sides, but especially beneath, somewhat hairy when young. They are almost opposite on the twigs, and when dried for the herbarium turn black. There are several varieties of this shrub, which were formerly honoured with specific rank.

[Ill.u.s.tration: _Pl. 72._ Purple Osier--winter.]

There remains a group of several small species of very local occurrence, with which we can do little more here beyond naming them.

The Woolly Willow (_Salix lanata_) is a small shrub, two or three feet high, with twisted branches, woolly twigs, and hairy black buds. The broad egg-shaped or oblong leathery leaves are also woolly, and two or three inches long. There are half-heart-shaped stipules at the base of the very short leaf-stalk. It is an Alpine plant, and is found about the mountain rills of Perth, Forfar, Inverness, and Sutherland at elevations between 2000 and 2500 feet. Conspicuous in spring for its rich golden catkins. Sadler's Willow (_S. sadleri_), of which only two or three specimens have been found (in Glen Callater, 2500 feet), is probably a form of this species.

The Lapland Willow (_Salix lapponum_) is of a similar proportion to the last-named, sometimes erect, sometimes trailing. Its leaves are more elliptic in shape, covered above with silky hairs and below with cottony filaments. In _lanata_ the raised veins form a network pattern; in _lapponum_ they are straight. The stipules at the base of the long foot-stalk are small or altogether wanting. Like the preceding species, it is restricted to Scotch Alpine rocks, at elevations between 2000 and 2700 feet.

The Whortle-leaved Willow (_Salix myrsinites_) is a small, wiry, creeping, or half-erect shrub, six inches to a foot high, with toothed, dark glossy leaves, an inch or less in length, whose net-veining shows on both sides. It is restricted to the Alpine parts of mid-Scotland, from 1000 to 2700 feet.

The Small Tree-Willow (_Salix arbuscula_) is a small shrub, whose stem creeps along the ground and roots as it goes, sending up more or less erect branches a foot or two high. The downy twigs are first yellow, then reddish-brown. The small leaves vary from egg-shaped to lance-shaped, and are s.h.i.+ning above and glaucous beneath; toothed. In the Highlands of Aberdeen, Argyll, Dumfries, Forfar, and Perth, between 1000 and 2400 feet.

The Least Willow (_Salix herbacea_) is not so restricted in its range, for it is found in all parts of the United Kingdom where there are heights sufficiently Alpine (2000 to 4300 feet) for its tastes. It is only an inch or two high, and has consequently the distinction of being the smallest British shrub. It is not so herbaceous as it seems, or as its name implies, for its shrubby stem and branches creep along underground, sending up only short, scantly leaved twigs. The curled, roundish leaves do not exceed half an inch in length; they are net-veined, toothed, and s.h.i.+ning. The catkins appear after the leaves.

The Net-leaved Willow (_Salix reticulata_) is another of the Scotch Alpines. It is similar in habit to the last-named, but larger, its buried branches sending up twigs a foot long. The roundish-oblong, leathery leaves are not toothed; they are smooth above and glaucous beneath, strongly net-veined on either side. The purplish or yellow catkins do not develop till after the leaves. It is restricted to the mountains of Aberdeen, Forfar, Inverness, Perth, and Sutherland.

The Weeping Willow (_Salix babylonica_), so conspicuous an ornament of riverside lawns, is an introduced species, whose slender branches hang downwards. It has large, lance-shaped, finely toothed leaves, smooth above and glaucous beneath. Further description of so well-known a tree is unnecessary. It attains a height of forty to fifty feet. The name _babylonica_ was bestowed in the belief that its headquarters were on the banks of the Euphrates. It is now known to be a native of j.a.pan, and other parts of Asia.

The name Willow is the Anglo-Saxon _welig_, indicating pliancy, willingness.

Our Native Conifers.

The British flora is singularly poor in coniferous plants, the Scots Pine, the Yew, and the Juniper being our only native species, and even of these some authorities will have it that the Yew is not truly a Conifer at all; they place it in a separate order--_Taxaceae_. For our present purpose, however, although the Yew does not produce cones, it will be convenient to keep it in its old position. The princ.i.p.al feature distinguis.h.i.+ng all Conifers and their allies (_Gymnosperms_) from other flowering plants (_Angiosperms_) is briefly this: Angiosperms have their incipient seeds (_ovules_) enclosed in a carpel, through which a shoot from the pollen grain has to penetrate in order to reach and fertilize the ovule. In Gymnosperms the carpel takes the form of a leaf or bract, upon which the naked ovule lies open to actual contact with the pollen grain. After fertilization the carpel enlarges to protect the seed, and becomes fleshy or woody, in the latter case a group of carpels forming the well-known cones of Pine or Fir.

[Ill.u.s.tration: _Pl. 73._ Yew.]

In some of the groups (as the Yew, for example) the male or pollen-producing flowers are borne by a separate tree from that which bears the female or cone-producing flowers. In the Pines both s.e.xes are found on the same tree; but throughout the order the pollen is carried by the wind. All the species are trees, or shrubs. They are among the most valuable of timber trees, and, in addition, yield a number of useful substances, such as pitch, tar, turpentine, etc. The leaves are always rigid, extremely narrow, and long in proportion: usually of the form that botanists term linear, with the two sides parallel. In the Yews these leaves spread out in two rows from opposite sides of the twigs; in the Pines they are in cl.u.s.ters of two, three, or five, seeming to be bound together at the base by a wisp of thin skin. The number of leaves in each bundle is often a help in distinguis.h.i.+ng species.

The Yew (_Taxus baccata_) lacks the graceful proportions of most of our trees, but it has for compensation a most obvious air of strength and endurance. Who doubts, as he gazes at some sombre Yew in the old churchyard, the story of the local antiquarian, who tells him the tree has so stood for 2000 years. He may, perhaps, mildly suggest that neither the church nor the churchyard was in existence so far back, but even then the antiquarian will probably have the last word by suggesting that the grove of Yews of which this formed part was the church of the past. Thousands see in cathedral aisles the reproduction in stone of the pine-forest or the beech-wood. Standing before an ancient Yew they may see whence came the idea for those _cl.u.s.tered_ columns. They actually exist in the bole of the Yew, which presents the appearance not of a single trunk, but of several trunks that have coalesced. This condition is due to the Yew continually pus.h.i.+ng out new shoots from the lower part of its bole, which take an upright direction, and coalesce with the old wood.

Although the Yew is a large tree, it is by no means a tall tree: the height of full-grown Yews in this country ranging between fifteen and fifty feet, though they are said to attain a greater length in India.

The bole of the Yew is short but ma.s.sive, covered with a thin red bark, that flakes off in patches much after the manner of Plane-bark. Large specimens have a girth of from twenty-five to fifty feet--or even more.

Such a circ.u.mference represents the growth of many centuries, for the annual growth-rings are very thin. It is this very slow growth that produces the hard, compact, and elastic wood that was so highly esteemed in the days of the long-bow. Not only is the timber elastic and strong, but it is exceedingly durable, so that it is said, "A post of Yew will outlast a post of iron." Its branches start from the trunk at only a few feet from the ground, and, taking an almost horizontal direction, throw out a great number of leafy twigs, which provide a dense and extensive shade. These leaves are leathery in texture, curved somewhat after the manner of a reaping-hook, s.h.i.+ny and dark above, pale and unpolished below.

[Ill.u.s.tration: Yew. A, male flowers.]

We have already mentioned that the Yew is a di[oe]cious tree--that is, one whose male and female blossoms are borne on separate trees--but the statement requires qualification to this extent, that occasionally a tree will be found bearing a branch or branches whose flowers are of the s.e.x opposite to those covering the greater part of the tree. The male catkin is almost round, a quarter of an inch across, and contains about half a dozen yellow anthers, the base surrounded by dry overlapping scales. They may be found during February and March, in profusion on the underside of the boughs. The female flower is much smaller, and consists of a fleshy disk with a few scales at its base, and on this stands a single seed-egg. After fertilization of the seed-egg the disk develops into a red wax-like cup around the enlarging seed with its olive-green coat. The flesh of the cup is full of sweet mucilage, which makes the fruit acceptable to children, but the flavour is rather too mawkish to suit older tastes. Yew-berries are not poisonous, as sometimes supposed; neither is the contained kernel, which has a pleasant nutty flavour.

Much has been said and written as to the toxic property of Yew-leaves, and it appears that though cattle and goats may browse upon them with impunity, horses and human beings pay the penalty of death for such indulgence. That word toxic, by the way, owes its significance to the Yew. The tree was named _taxus_ in Latin, from the Greek _toxon_ (a bow), because of the ancient repute of its wood for making that instrument. The tree was held to be poisonous, and so its name in the form of _toxic.u.m_ came to designate all poisons.

[Ill.u.s.tration: _Pl. 74._ Bole of Yew.]

There are some lines in _In Memoriam_ which many readers of Tennyson have found as obscure as the shade of the Yew where they were conceived.

The poet is addressing a venerable churchyard Yew in these words:--

"Old warder of these buried bones, And answering now my random stroke With fruitful cloud and living smoke; Dark Yew, that graspest at the stones And dippest towards the dreamless dead, To thee, too, comes the golden hour, When flower is feeling after flower."

To any readers who have found a difficulty in understanding these lines, we would say: visit the Yew groves in February or March, when the male branches are thickly covered with their yellow flowers, and strike a branch with your stick. In response to the "random stroke" the pollen will fly off in a "fruitful cloud" or "living smoke," some of it to be caught by the minute female blossoms. This is the Yew-tree's "golden hour, when flower is feeling after flower."

Wayside and Woodland Trees Part 5

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