Web
and Book design,
Copyright, Kellscraft Studio 1999-2007 (Return to Web Text-ures) |
Click
Here to return to Sand Dunes and Salt Marshes Content Page Return to the Previous Chapter |
(HOME) |
CHAPTER III VEGETATION IN THE DUNES
BY far the most characteristic plant of the dunes, one that is of great economic importance in that it restrains by its binding network of roots the movement of the sands, is the cosmopolitan beach grass — the maram-grass of East Anglia — a plant which by its scientific name reiterates both in Greek and in Latin that it is a sandy sand lover. Everywhere it extends its long, creeping rootstocks, sending up at the ends its spiny-tipped leaf-blades, sharp and hard as a needle, where they emerge from the sand. Tangles of withered stems and rootstocks hang in festoons from the steep retreating sides of the dunes, but on the leeward side the grass struggles bravely above the engulfing sand. In the comparatively level stretches back of the beach, the grass grows to greatest perfection and reaches a height of two or three feet, growing thickly, dark green and shining in summer, and bearing pale yellow fruiting stalks in the autumn. As the winter comes on the green gradually fades, but is replaced by a golden straw color, that like a luminous yellow haze spreads over the sands. While the beach grass is beautiful in mass, with its colors varying with the season, the individual clumps and sprays of graceful upright and drooping grass stems, and rigid plumes of flower and fruit are exceedingly picturesque in their brilliant white setting of sand. Around each clump is often drawn a magic circle, a fairy ring, for the drooping grass blade, blown by the wind, writes with its tip in the soft sand. GROVE OF PITCH PINES CLUMPS OF FRUITING BEACH GRASS. THE TIPS OF BURIED PINES BEARING CONES MAY BE SEEN IN THE FOREGROUND Another
plant which
binds the sand has the singularly inappropriate name of poverty-grass,
for it
is not a grass, but a member of the rockrose family, and it expresses
anything
but poverty, if one is to judge by its wealth of golden blossoms, which
paint
the dune sides yellow in June. Rather should it be called by its own
name,
Hudsonia, given it in honor of William Hudson, an early English
botanist.
Matted together like heather and close to the sand, it forms in summer
great
patches of a beautiful sage green, which in the autumn are tinged with
yellow,
and in winter become sandy gray, while in the spring all is smothered
in the
brilliant yellow of the closely crowded blossoms. The Hudsonia is a
plant well
worth knowing. In the dry
sand a
number of interesting and characteristic plants are to be found, some
of which
prefer the sea side of the dunes close to the beach. The American sea
rocket is
one of these, a plant of the mustard family, with small purplish
flowers, but
swollen and dropsical like a sand-loving cactus. Another swollen
cactus-like
plant is the saltwort, cactus-like also in that it is beset with sharp
points,
woeful things for the bare foot. The
resemblance of
these plants to the cacti is not wholly accidental, for, like cacti,
they are
growing to a certain extent under desert conditions, and it is
incumbent on
them, therefore, to treasure up as much moisture as possible. In the
dunes
the air always contains moisture, and the sand is wet a few inches
down, no
matter how dry it may be on the surface, yet the strong winds, the
intense
light and great heat radiated from the white sand approximate the
conditions of
a desert. Both the desert cacti on the one hand and the sea rocket and
saltwort
on the other conserve moisture by making reservoirs for water in their
stems
and leaves, taking on a fleshy habit, in the language of the botanists.
The
saltwort also resembles the cacti in its spiny defenses. It always
seemed to me
a cruel state of affairs that in the deserts, where vegetation is so
scanty,
the plants should be so forbiddingly spine-covered; but after all
Nature
always looks after the individual, she is not altruistic. These sand
dune
plants are then true xerophils, — lovers of dryness. In the
same
situation near the edge of the beach grows the cockle-bur with its
beaked and
spiny fruit, and also the salt-loving orach. In
photographs of
the semi-arid regions of eastern Africa, one sees great spreading
trees, giant
candelabra, under which the rhinoceros takes his noonday siesta. These
are
euphorbias or spurges, and here throughout the dunes a lowly member of
the same
family, the seaside spurge, spreads itself in mats from the size of a
silver
dollar to that of a large saucer, prostrate on the sand. By a central
tap-root
it draws its nourishment from the damp sand below. The purple gerardia,
closely
akin to the seaside gerardia of the salt marsh, and the joint-weed,
with its
delicate rose-colored or white blossoms that appear throughout the
fall, are
also common. The beach
wormwood
is another plant of these sandy regions, a plant brought from
northwestern
Asia, but one that has rapidly increased in numbers on the Atlantic
shores in
the last thirty years. It is the “dusty miller” of old-fashioned
gardens, and I
am inclined to think that at Ipswich it escaped into the dunes from the
old
lighthouse-keeper’s garden. There is also one patch of bearberry in
the
Ipswich dunes. Each species of goldenrod — and there are over fifty in eastern North America — has an interest and beauty of its own, but the salt-loving species, the seaside goldenrod, which is equally at home on the edges of the dunes and on the border of the salt marshes, is certainly one of the finest, with its dark green vigorous leaves and its robust flowering stalk of large golden flowers. Long after the flowers have succumbed to the frosts the stalks stand up like gray plumes waving in the wind. While the cultivated sweet pea does not blossom unless it has an abundance of moisture, its wild relative, the beach pea, with its purple flowers and rich green leaves, thrives amid the dry sand and bears plentifully its flowers and small round peas. SEASIDE GOLDENROD One would
hardly
expect to find mushrooms growing in the dry sand, but there are a
number such,
both on the bare wastes and among the groves of trees and bushes. The
most
noticeable one is the sand-star puffball, which in wet weather
stretches its
leathery-looking star flat on the sand, and holds on its upper surface
a
puffball not much larger than a hazel-nut. In dry weather the leathery
arms of
the star curl up dry and brittle around the puffball, as if to protect
it from
the sun. Common in the dunes is a brown mushroom whose stem, swollen
and
bulbous, extends down some distance into the sand, as if to retain as
much
moisture as possible. The
depressions
between the dunes, which vary in size from small circular basins but a
few feet
across, to valleys a third of a mile broad between the amphitheatre
waves, are
to a large extent carpeted with cranberry vines. In the large bogs the
vines
extend upwards in a thick spongy mat, into which one sinks half-way to
the
knee, while in the smaller depressions the vines often run prostrate
in a thin
branching film of great beauty over the white sand. The
American
cranberry is worthy of the poet’s pen, for at all seasons it is a
delight to
the eye, while of the pleasures its fruit affords to the palate there
is no
need to speak; it suggests the delights of the New England
Thanksgiving. In the
spring its pale rose-colored flowers, nodding on delicate stalks, in
summer the
brilliant polished green of its leaves, are but the prelude to its
varied
charms in autumn and winter. The botanists call it evergreen, which is
literally true only as regards the under protected leaves, but all on
the
surface change in the fall to a dark red, and later to a wonderful
maroon
color, which, in the setting of white sand, is regal in its
effectiveness. Early in the summer, after the delicate blossoms have fallen, tiny pale green or whitish berries appear, which gradually grow in size and grace, taking on successively a pink, a brilliant crimson, a dark red and lastly a purple color. Fortunately in these dimes no attempt at cultivation is made, there is no dyking nor draining, no weeding nor planting, so that the cranberry vine grows with its native grace and freedom. Many berries escape the pickers in the large bogs, and many of the small bogs, hiding among the dunes, are overlooked entirely. Some years the frosts come early and all the berries are lost to commerce. Other years several hundred barrels are picked by hand and with box rakes. In any event the dune wanderer can always pick his pockets full, and, with a little water and much sugar, may quickly convert the berries over the fire into a delicious “sauce.” I have often gathered them from beneath the snow, and their fine resistant qualities keep them sound even when in the spring floods they are floated away and line the shores of the bog pools in windrows. I once for a record made a good sauce of these berries on the first of June. THE BROWN MUSHROOM OF THE DUNES SAND-STAR PUFFBALL Drawn from Nature by Robert Swift. Another
great
attraction these natural cranberry bogs have which the artificial ones
lack is
their wealth of extraneous plants, — herbs, bushes and even trees. In
fact some
of the bogs are so overgrown that the cranberry vines take but an
insignificant
part. Clumps of blue irises are beautiful in the spring in their
cranberry vine
setting, and when, as occasionally happens, they escape from their
environment
and blossom in the white sand, they look for all the world like a
picture on a
Japanese screen. There are
two
lovely orchids which bloom abundantly in the early summer in the bogs, Pogonia,
the bearded-one, with its pinkish flowers generally single, and Calopogon, the
beautiful bearded-one, with its half dozen or more clustered flowers,
whose
color, according to Gray’s Manual, is “magenta-crimson.” The very name
orchid
has an interest and charm, but it is certainly deserved in the case of
these
two dune-loving orchids, for they are extremely beautiful. Another
interesting
bog-plant, with leaves so divided that they suggest the royal fern, one
that is
common on the southern seacoast of the Labrador peninsula, is the
Canadian
burnet. This blossoms in midsummer in long cylindrical spikes of white
flowers.
A more modest but most interesting inhabitant of the bogs, one that
grows
abundantly in places, is the sundew, which owes its name to the
dew‑like drops
that glitter in the sunlight on the tips of the bristles covering the
little
round red leaves. This “dew” is not so innocent as its name would seem
to
imply, and leads to the death of tiny insects. Attracted by the dew,
which is
secreted by the plant, the insect alights, and is held there by the
glutinous
fluid and also by the tiny hairs which bend over and enclose it. At the
same
time a digestive secretion is poured out, under the action of which
the
nutritious parts of the victims are dissolved and absorbed. It is rare
to find
a plant without one or more insects in various stages of digestion on
its
leaves. They are veritable charnel-houses. The flowers are borne on
stalks and
are white and inconspicuous. In the shady bogs grow also clumps of the
beautiful royal or flowering fern, as well as the sturdy interrupted
and
cinnamon ferns. A CRANBERRY BOG IN THE DUNES WITH SINGLE PITCH PINE CRANBERRY VINES ON THE SAND Before
taking leave
of the smaller plants I should mention another orchid, the lady’s
slipper,
which, however, is hardly a sand dune plant, for it demands the
sheltering
environment of the pitch pines that grow among the dunes. In May and
June its
beautiful crimson pink flowers nod upon their stalks. Moccasin flower
is its
proper name, for in its broad and swelling outlines it resembles much
more
closely the Indian moccasin than the pointed lady’s slipper. Of the
bushes
growing in the dunes, the beach plum is the most characteristic, a
straggling
prostrate shrub where it is exposed to the full force of the wind, but
expanding luxuriantly in the protected hollows. In the early spring it
is a
mass of white blossoms, and in the fall the small globular purple or
crimson
fruit can be gathered. There is a wild flavor about it not
unattractive. It is
not common at Ipswich, but abounds at Plum Island, from which, indeed,
the
island takes its name. Everywhere
in the
dunes grows the bayberry or myrtle with its fragrant leaves and
aromatic,
wax-covered berries, the favorite food of four different kinds of
birds,
namely, the flicker, crow, tree swallow and myrtle warbler. In fact the
myrtle
warbler not only owes its name to the berries, for the older name of
yellow-rumped warbler has been discarded, but also its ability to
brave the
northern winter when all its companions of the same tribe have fled to
warmer
climates. The early settlers found these bayberries useful for making
candles
which had a delicate greenish brown tint, and exhaled a faintly
aromatic odor.
The berries were gathered in large quantities and boiled in kettles,
and the
wax which rose to the surface of the water was skimmed off when cool. BEACH PLUM BUSHES AT PLUM ISLAND Early in
May the
bayberry bushes are still gray and wintry and well gleaned of berries,
unless
perchance they have been long protected by the snow. In the summer
they are
densely clad in a dress of shimmering green; in the autumn the leaves
turn
brown and the berries, hitherto inconspicuous by their green color,
become gray
and hoary. The fruiting branches, with their closely clustered berries,
are
very beautiful, and stand out the more clearly as they generally drop
their
leaves earlier than do the barren branches. Throughout the winter the
snowy
gray of the bayberry clusters is a delight to the eye. Less
abundant than
the bayberry among the dunes is its first cousin, the sweet gale, a
fragrant
bush, but easily distinguished from the bayberry by its dull green
leaves with
faintly toothed edges. In the early spring, while the bayberry is still
gray in
its winter sleep, the sweet gale takes on a rich chestnut hue which
glows in
many a sandy hollow. Its fruit, however, is brown in color and
comparatively
inconspicuous. The sumach
family
is an interesting and beautiful one. Three of the tribe occur in the
dunes, and
of these the staghorn sumach deserves first place with its thickets of
brown,
hairy branches in the spring, very suggestive of a stag’s antlers in
the velvet.
Its wealth of dark green foliage in the summer is tropical and
palm-like in
appearance, and its flame-colored masses of fruit in the autumn are
borne
aloft like so many torches on the ends of the branches. Its great
compound
leaves, before they drop, rival the fruit in color. Unlike the
staghorn, the
poison sumach or dogwood is decidedly uncommon, and is easily
distinguished
from it by its more delicate leaflets, its reddish leaf stalks and its
white
fruit. The last of this group in this seashore region, the poison ivy,
abounds
in every grove and thicket, and there is no more beautiful vine, with
its
shining green leaves which change to wonderful shades of yellow and red
in the
fall, and on whose bare winter branches hang clusters of greenish
yellow berries.
Perhaps
the most
beautiful common bush of the dunes is the wild rose, of which there are
at
least two species. These fragrant single roses seem to take on a deeper
crimson
in this maritime region than farther inland, and their changing foliage
in autumn,
and their red hips that stand out in the snow are always attractive.
Shad
bushes, with their early white blossoms, clumps of meadow-sweet and
hardhack
with their pink and rose-colored flowers, are common in the dunes, and
in one
or two places the hardy leather-leaf, named Cassandra, survives the
winter
with its evergreen leaves, and with flower buds ready to open in the
spring. In
the fall and winter the black alder or winterberry bushes are aflame
with their
crowded crimson berries. BAYBERRY IN WINTER HUDSONIA AND ADVANCING DUNE There is one bush that grows in two small patches in the dunes whose discovery in bloom is always a delight.
May the
beauty and
charm of these flowers long be “wasted on the earth and sky,” and not
ruthlessly plucked and exterminated from this region! The trees
of the
dunes remain to be enumerated. The most important tree is the pitch
pine,
which forms two groves of several acres in extent, both of which have
spread
considerably in the last twenty years. Mr. C. J. Maynard tells me that
forty
years ago not only were there no pines, but no large clumps of bushes
to be
found in the dunes. One of these pine groves, as we have already seen,
is being
overwhelmed by a sand wave from the north, but is more than making up
for this
by its extension to the south. The trees are somewhat stunted and
rarely reach
a height of more than thirty feet, but their thick groves are a welcome
refuge
in storms for bird and man alike. I have often cooked my dinner in
comfort in
the lee of these trees when in the open dunes the wind and sand cut
like a
knife and the frost was severe. In addition to the pines there are several thickets of graceful white birches whose height is carefully regulated by that of the encircling dunes, and the wind that sweeps over them. Thickets and clumps of alders, as well as of aspens and willows, are also common. DINNER IN THE LEE OF THE PINES The
exceptional
trees are a few scattered white pines, small and frayed by the wind,
some
thrifty red cedars, a couple of hunched up hemlocks which bear no
resemblance
to the stately forest trees, a few red maples, two elms, dwarfed and
stunted,
that look large only at a distance, and two small clumps of red
birches. The
red or river birch is common in Texas, the lower Mississippi region
and
Florida, and extends along the coastal plain to Long Island. From there
to
Essex County, Massachusetts, is a gap of one hundred and fifteen miles
where
the tree is absent, but it is common in the lower valley of the
Merrimac River
and in southern New Hampshire. Professor M. L. Fernald explains this
distribution by the former existence of a great highway for plant
migration, a
sandy shelf that extended out for miles all along the coast from the
southern
parts of the United States to Newfoundland, a shelf which has largely
sunk
beneath the waters since the close of the glacial period. |