Monica Johnson and Brigid Campbell
look at the ever-changing flora and fauna in our beautiful wildflower
meadow which is named in memory of Reg Smith, founder of the Hawk Conservancy
Trust.
“CHRISTMAS TREES”
Conifers at the Hawk Conservancy Trust
Visit the Trust in winter, and the park is still full of
green trees – the evergreens. Among them are a lot that
look more or less like Christmas trees: pointed tops, and
leaves that aren’t at all like the leaves of other trees
like oaks, beeches or maples. These trees are the “conifers”,
which means “cone-bearers”, so called because
they produce their seeds wrapped in cones with woody scales,
of which pine cones are the best known example. The scales
open when the seeds are ripe to let them fall or be blown
out.
All conifers have leaves which have been modified to stiff,
often shiny, needles, scales or spines. This sort of leaf
is very good at conserving moisture, and many conifers can
grow in dry climates. The trees often have sticky resin, which
makes them also very cold-resistant. The conifers at the Hawk
Conservancy Trust fall into three families: the Pine family,
the Cypress family, and the Redwood. There are several other
conifer families that are not represented at the Trust.
PINE FAMILY
Trees of the Pine family have their leaves in the form of
needles. The arrangement and size of the
needles, and the size and shape of the cones, are important
in identifying them. Cones are usually densest near the tops
of the trees.
Scots Pine
Pines (Pinus) have long needles, which can
be bundled in 2s, 3s or 5s according to species. The Scots pine
Pinus sylvestris is the only native British pine, and
has relatively short needles in pairs, normally up to 7 cm (3")
long, but up to twice as long on young trees. The cone is roughly
pear-shaped, about 8cm (3") long, and its scales open up
when the seeds are ripe. There are a few young Scots pines in
the copse at the bottom of the meadow. The Scots pine is found
across Europe, and was the original Christmas tree when the
tradition was imported to Britain from Germany by Prince Albert.
It is still the favourite Christmas tree in North America.
Most pines when old tend to lose their lower branches and
become flat-topped. Some Mediterranean species have very large
cones which produce edible (and delicious) pine nuts.
Cedars (Cedrus) have needles which grow
in dense tufts, and produce large barrel-shaped cones that
sit upright on the branches of the tree. They can grow very
fast, and have fragrant wood. The best-known cedar in Britain
is the Cedar of Lebanon, from the Middle East; but there are
none in the park. There are however two other species of cedar.
Atlas Cedar
The Atlas Cedar Cedrus atlantica comes from the mountains
of North Africa and was brought to Britain in 1845. The variety
most often grown is the “blue Atlas”, which has
rather short, thick, blue-grey needles. There are small Atlas
cedars in two of the copses in the meadow, which have much more
of the Christmas tree shape than other cedars.
Deodar
The Deodar Cedrus deodara was introduced from Afghanistan
in 1831. It has an elegant, drooping shape and rather long,
fine, green needles. There are several deodars around the park:
in the sheep field, near the kestrel box in the meadow (the
biggest on the park), and even a few very small ones in some
of the aviaries.
Douglas Fir
The Douglas FirPseudotsuga menziesii
was introduced from the Rocky Mountain area in 1827. It is not
related to other firs, and has rather soft, short needles arranged
along each side of the twigs. It has distinctive cones with
three-pronged “tongues” sticking out between the
scales. This tree is exceptionally fast-growing and can reach
a height of 50m (180 feet) in just 70 years. The very fine conifer
near the entrance to the shop is the only one on the park.
Spruces (Picea) have rough, usually sharp
needles which tend to lie flat to the tops of the twigs. Many
have whitish stripes on the backs of the individual leaves.
The cones hang down when developing, and fall off whole.
Norway Spruce
The Norway spruce Picea abies is what we now think
of as the Christmas Tree. Not native to Britain, it is found
right across the northern part of mainland Europe and has been
grown here since before 1500. It has rather short, soft needles
for a spruce, and large light brown cones with flat scales,
20 cm (8") long. There are many well-grown Norway spruces
on the park, especially around the entrance and by Micawber’s
aviary. The lower branches of mature trees droop, but the tops
still look like the small trees sold at Christmas.
Colorado Spruce
The Colorado spruce Picea pungens is a popular garden
tree, especially in its blue form “Glauca”. The
tree is native to the south-western USA and was introduced in
1852. This spruce has thick, curved, stiff needles nearly an
inch (2cm) long, and the young growth, at least in the common
cultivar, is blue-grey. Its cones are similar to those of Norway
Spruce, but rather smaller. There is one opposite Cinnamon’s
aviary.
Serbian Spruce
The Serbian spruce Picea omorika is a striking tree:
the ends of the branches curve up to reveal bright silver linings
under the unusually blunt leaves. The cones are quite small
– no more than 8 cm (3") long – but the same
light brown as those of other spruces. As its name suggests,
it comes from Serbia and was brought to Britain in 1889. There
are two in the deer enclosure, together with a Norway spruce
of similar age, and very similar overall shape.
REDWOOD
Dawn Redwood
The Dawn redwood Metasequioa glyptostroboides is
a tree with no close relatives. It was only discovered and
brought to England from China in 1948. This tree has soft,
feathery green leaves which turn red and fall in autumn. There
are two small specimens of this rather rare tree in the Harris
Hawk flying arena. It is said to be unusual for them to produce
cones in Britain but both these trees produced a few in 2007:
young cones are like small green radishes with a pointed end,
but when ripe they are brown with open scales and about 2cm
(¾") long.
CYPRESS FAMILY
Trees of the Cypress family have very small “scale
leaves” normally pressed nearly flat along the twigs,
though in youth some produce spiky, needle-like leaves. Their
fruit, like the Pine family, is generally a cone, though very
small and growing at the end of a leafing branch.
Monterey Cypress
True cypresses (Cupressus) have tiny scale
leaves covering a disorganised mass of thin twigs. The cones
are round, from marble to conker size. One of the most interesting
trees in the park is a big Monterey cypress Cupressus macrocarpa,
a species introduced from California in 1838. It grows in the
“owl garden” and must be around 13 feet (4 m) in
girth. Its name “macrocarpa” means “big fruit”,
and the conker-sized cones are the biggest of any cypress. This
tree was planted by Ashley’s grandfather in 1947, and
has grown to its huge size in just 60 years – it is one
of the fastest growing of all trees.
Lawson Cypress
False cypresses (Chamae-cyparis) have elegant,
fern-like hanging sprays of scale-leaves and tiny round cones
about the size of a pea. The Lawson cypress Chamaecyparis
lawsoniana was introduced from California or Oregon in
1854 and has become the most widely-planted conifer in Britain,
with over 200 different fancy varieties in a huge range of sizes,
shapes, foliage and colour variations. Most of the cypresses
in the park are varieties of this species. There are some good
blue-grey examples at the entrance to the Woodland Owls arena.
Lawson Cypress
Var. Fletcheri
One tree with strikingly different foliage can be found on one
corner of the group of trees near the vulture aviaries. The
tree itself is very upright, with upswept branches, and the
foliage is feathery, with all the leaf-scales elongated into
points. This is probably the variety “Fletcheri”,
which is one of three rather similar varieties very popular
in suburban gardens.
Leyland Cypress
“Castlewellan Gold”
Hybrid cypresses have been produced by plant
breeders. The best known is the Leyland cypress Cupressocyparis
leylandii. This was produced in Britain in 1911, a cross
between the Monterey cypress and the Nootka cypress, which is
a close relative of the Lawson cypress. Very fast growing and
much used as hedging and wind-breaks, Leyland cypresses have
foliage intermediate between the parents: long sprays of scale-leaves,
but more or less twisted and three-dimensional, often strongly
upswept. Most of the Leylands on the park have been removed,
but there are still the yellow-tinged trees in the car-park,
which are probably the cultivar “Castlewellan Gold”.
Leyland cypresses rarely produce cones, but one common variety
“Leighton Green” can do so: they are intermediate
in size between those of the parents, about the size of a Malteser!
Thuja
Thujas are very similar to false cypresses,
but their leaf-scales are much bigger and rather shiny, the
leaf-fans are rounded, not pointed, and the little flower-bud-like
cones are upright on the twig-ends. The commonest is the confusingly-named
Western Red Cedar (it is not a cedar) Thuja plicata,
introduced from Eastern Canada in 1853. One of the most elegant
of conifers when allowed to grow into a big tree, it is surprisingly
common in hedges.
Thuja plicata
There is a rather small one with many cones in the middle of
the golden Leyland hedge in the car park, and a splendid golden
variety (no cones) in the clump of trees by the vulture aviaries.
This is probably “Zebrina”. The leaves have a sweet
smell often compared to pineapple, and on sunny days it perfumes
the air round the tree.
The wood is fragrant and highly prized. The
best-known local example of something made from a Western
Red Cedar is the totem pole at Virginia Water.
Juniper Bushes
Juniper Leaves
Junipers (Juniperus) often retain their spiky
scale leaves all their lives. The common juniper Juniperus
communis is the only member of the Cypress family native
to Britain, growing on chalk downland – for example, at
Danebury Hillfort. There is a fine upright tree of this species
next to the burrowing owls and several low bushes around the
pond in the Woodland Owls arena. The two sprawling, blue-grey,
semi-prostrate bushes on the lawn by the White-tailed Eagles
are also fancy cultivars of juniper, with a mixture of flat
and prickly scale leaves. Juniper cones are in the form of small
black berries about the size of an elderberry, which can be
used in cookery. They are also used to flavour gin (Dutch “genever”
means juniper), and you can smell the gin if you crush a juniper
berry.
Featured Plants – New Species Found in Reg’s
Meadow in 2007
Agrimony (Agrimonia eupatonia)
An
erect, softly-hairy perennial, a member of the Rose family,
growing to 60cm or more. It has toothed, pinnate leaves, with
two pairs of small leaflets between the main pairs. The five-petalled,
yellow flowers are 5-8mm across, carried in long spikes. The
plant is frequent to common in Britain, except in northern Scotland,
found on roadsides, hedge banks, grassland and scrub, especially
on chalky soils. Flowers from June to September. There was just
one clump of Agrimony in the meadow, half way between the entrance
to the meadow and the seating area, just a few yards beyond
the low leylandii hedge.
Herb Bennet or Wood
Avens (Geum urbanum)
A
medium-sized, hairy perennial, another member of the Rose family,
growing up to 60cm. It has unequal, pinnate and bluntly-toothed
leaves, with the end leaflet larger than the others. The yellow
flowers are 5-9mm across, with five rounded petals. It is very
common in Britain, found in woods, hedge banks and scrub land,
growing in light shade, on less acid soil. Flowers from May
to August. We have found this plant in only one place in the
meadow so far, in the hedge to the right of the hides, in the
semi-shade of the trees.
Rough Chervil (Chaerophyllum
temulentum)
A
tall, erect herb, a member of the Carrot family, very similar
in appearance to Cow Parsley, but whereas Cow Parsley flowers
from April to June, Rough Chervil comes after it and flowers
from June to July or August. For some time we thought this was
Cow Parsley, but managed eventually to identify it as Chervil.
The stems of Rough Chervil are solid, with purple spots, dull,
dark, very hairy grey-green leaves and white flowers in umbels,
very like those of Cow Parsley, but slightly smaller and daintier.
It is common in Britain, except in the north of Scotland, but
rare in Ireland. In Reg’s Meadow there was an impressive
sweep of Rough Chervil along a large part of the bottom hedgerow
in 2007 and it has also appeared in other parts of the meadow
hedgerows.
Bladder Campion (Silene vulgaris)
A
waxy, more or less hairless perennial, a member of the Campion
and Carnation family, 25-90cm tall, with semi-erect stems, forking
into branches of flower heads. It has opposite pairs of greyish
and waxy leaves, oval, pointed and rather stiff. The white flowers
are in loose clusters, 10-18mm across, with five, deeply-notched
petals enclosed in a ribbed, bladder-like calyx, making this
plant easily distinguishable from White Campion, another member
of the same family. It is fairly common in southern Britain,
more scarce further north and in Ireland, found on dry banks,
open grassland and field margins. Flowers May to September.
There was just one clump in the meadow this year, beyond the
far end of the seating area, about 20 yards down in the central
area.
Knapweed Broomrape (Orobanche
eliator)
We
have found Common Broomrape regularly in the meadow, but this
year we believe we have also had Knapweed Broomrape, in the
central area, close to the southern, left hand path. Like all
Broomrapes it has erect, fleshy, hairy stems, which are often
easier to spot after the flowers have died away, as the dry
brown spikes stand out against the green meadow foliage. Knapweed
Broomrape is taller than Common Broomrape and has yellow stigmas,
while those of Common Broomrape are purple. Broomrapes are parasitic,
each variety on a different species of host plant, this one
on Greater Knapweed, a widespread species in Reg’s Meadow.
The leaves of Broomrapes are reduced to scales and the plants
contain no chlorophyll, so they have no green parts. This species
is frequent to locally common in southern and eastern England.
We will look out for it again in 2008.
Spiked Sedge (Carex spicata)
This
small sedge appeared among the grasses in front of the hides,
just one plant, close to the mown path into the meadow, in May
2007. We never found it again, as the taller grasses grew up
and hid it! As far as we can tell by looking at photos on the
Internet the most likely identification is Spiked Sedge, although
the soil conditions in the meadow are not the usual ones given
for this species, but it has been identified in at least one
web site as growing in a grassland meadow. Any other suggestions
gratefully received and we’ll see if it comes back this
year!
Golden Oat-grass (Trisetum
flavescens)
An
erect, perennial yellowish grass, 20-50cm tall. It has flat
leaves, downy on top and an oblong flower head with whorls of
spreading branches. It is found all over Britain except northern
Scotland, growing in meadows and grassland, flowering from May
to June. We are gradually identifying new grasses in the meadow
– they are quite difficult to tell apart, but the list
is growing!
Pendulous Sedge (Carex pendula)
A
native perennial, growing in large tufts in damp, deciduous
woodland and by streams, on clay soils. It is found in southern
and eastern England and in our meadow it grows in the old pond,
now dry, in front of the seating area. It is a large, showy
grass, with long pendulous female spikes. Flowers from May to
June.
Hedge Woundwort (Stachys sylvatica)
A
bristly, perennial plant with erect stems, 30-80cm tall, a member
of the Mint family. It has pointed, toothed, oval leaves which
smell unpleasant when bruised. The flowers are dark reddish-purple,
with white blotches, growing in whorls around the stem. It is
very common in most of Britain and Ireland, found in woods,
hedge banks, overgrown gardens and cultivated land. Flowers
July to September. This grows just outside the meadow proper,
in the small triangular patch known as Janet’s Meadow
– we will look at this area in detail in a later page.
Wild Parsnip (Pastinaca sativa)
An erect, downy, branched perennial, a member
of the Carrot family. It has angled, hollow, furrowed stems
and pinnate, toothed leaves. The yellow flowers are carried
in umbels 5-10cm across. This is an ancestor of the cultivated
vegetable and is common in southern and central Britain, rare
in Wales, Scotland and Ireland. It grows on roadsides, grassland,
scrub and waste land, especially on dry chalky soil. Flowers
June to August. Brigid found one plant towards the bottom of
the meadow last summer, but we have not been able to find it
again, so sorry, no photograph! We’ll try and find it
again this year.