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Jeremy Bartlett's LET IT GROW blog

The wonder of plants and fungi.

Jeremy Bartlett's Let It Grow Blog
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"People from a planet without flowers would think we must be mad with joy the whole time to have such things about us." - Iris Murdoch

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Alder Goblet, Ciboria caucus

Jeremy Bartlett's LET IT GROW blog Posted on 19 February, 2018 by Jeremy Bartlett19 February, 2018
Alder Goblet, Ciboria caucus

Alder Goblet, Ciboria caucus

Yesterday we went for a walk by the River Wensum in Norwich, by Sweetbriar Marshes. It was sunny and there was warmth in the air and with a bit of imagination you could believe it was spring. We even saw a few Lesser Celandines and a single Marsh Marigold in flower, and a couple of interesting flies.

Above us in the Common Alder trees, a flock of Siskins was feeding on Alder cones. Beneath our feet, near the side of the path, we found Scarlet Elfcups and, a little further on, the fungus we’d come to look for: Alder Goblet, Ciboria caucus.

Alder Goblet, Ciboria caucus, is an ascomycete fungus, in the family Sclerotiniaceae. Although many of the family are plant pathogens (fungi which cause plant diseases), Alder Goblet is a saprophyte (it feeds on decaying organic matter). Alder Goblets are found on the previous year’s fallen male Common Alder catkins. Sometimes willow or poplar catkins can be used instead.

Alder Goblets are small, up to 1cm across. The fruit body is cup-shaped but becomes flatter with age. The cup is pale brown and its inner surface is smooth, while the outer surface has a downy appearance.

If you gently remove an Alder Goblet from the surrounding mosses and leaf litter you will see that it has a long, wavy stem that attaches to the remains of a male catkin. Sometimes a single catkin can have more than one Alder Goblet growing on it.

Alder Goblet on male alder catkin

Alder Goblet on male alder catkin

Now until April is a good time to see Alder Goblets. Sterry and Hughes describe them  as being widespread and common in the British Isles. There is a map of sightings on the NBN Atlas website. Roger Phillips’ fungi book includes the Alder Goblet, which he describes as “not edible”. Alder Goblets aren’t included in the Collins Fungi Guide by Buczacki et. al.

Further afield, Alder Goblets can be found in other parts of Europe, including Denmark (there are some good photos on the Danmarks svampeatlas website), the Czech Republic, Slovenia, Russia, Bulgaria, Norway and Finland, as well as British Columbia, Washington and Oregon in the Pacific north-west of North America.

Closer to home, James Emerson has found Alder Goblets at Thorpe Marsh, to the east of Norwich (February 2017), and at Titchwell RSPB Reserve (February 2018) and has written about them in his ‘Birds and Beer’ blog.

A related species, Ciboria batschiana, grows on fallen acorns. It is described by Sterry and Hughes as “widespread but occasional” in England. I will keep a look out for it, as it has been recorded in Norfolk.

Siskin on Alder cones

Siskins were feeding on Common Alder cones, as we searched for Alder Goblets.

Posted in Fungi | Tagged Alder Goblet, Ciboria caucus

Oxeye Daisy, Leucanthemum vulgare

Jeremy Bartlett's LET IT GROW blog Posted on 29 January, 2018 by Jeremy Bartlett2 February, 2018

“The nodding oxeye bends before the wind” – John Clare, “The Fear of Flowers“.

Oxeye Daisy

Oxeye Daisy flower with Mint Moth, Pyrausta aurata, and Thick-thighed Beetle, Oedemera nobilis.

Spring starts with the white flowers of Snowdrops and the theme continues throughout spring and summer with a series of white flowers, including Blackthorn blossom, Wild Garlic, Garlic Mustard, Cow Parsley, Hawthorn, Hogweed and Wild Carrot.

In late May and June in our wildflower meadow, it is the turn of the Oxeye Daisy, Leucanthemum vulgare. This member of the Daisy family, the Asteraceae, will sometimes continue to flower into September. It can be found throughout the British Isles, up to 845 metres (nearly 2800 feet) above sea level, on Great Dun Fell in Cumbria. Further afield, it is native to temperate parts of Europe and Asia.

The Oxeye Daisy (sometimes spelt Ox-eye Daisy) is like a much bigger version of the Common Daisy (Bellis perennis) that flowers on lawns and it grows to 40 centimetres (16 inches) tall. Each flower head can be five to six centimetres (2 – 2.4 inches) across and consists of lots of yellow disc florets in the centre and about twenty white ray florets around the outside. The leaves are dark green and toothed, and the lower ones, which stay green in winter, have a distinctive spoon shape and long leaf stalks. Further up the stem, they are thin and jagged.

Oxeye Daisies like to grow in grassy places, such as in meadows, pastures and waste ground, and on dunes and cliffs. They will quickly colonise open ground and can sometimes be seen on road verges and by railway lines. Oxeye Daisies can persist in shorter grass without flowering and I remember when, at our old house, next door’s lawn was allowed to grow long one summer and became a meadow of Oxeye Daisies.

Unless Oxeye Daisies can spread by seed they will die out if there is too much competition from other species. Grazing, mowing or low soil fertility will allow them to persist. They are “particularly rampant in fertile soil“.  In our garden, a clump I planted in the wildflower meadow when I established it in late 2013 is doing very well and has seeded into other parts of the meadow.

Oxeye daisies like a sunny spot and neutral to basic soils that aren’t too wet. This year I am going to grow some in pots in the front garden, where I hope they will seed into cracks between paving slabs in the drive. Even if they don’t, they should form a longer-lived version of the wild flowers in a pot I grow every year.

Oxeye Daisies are particularly good for wildlife and in our garden the flowers have attracted a range of insects from moths and flies to beetles and solitary bees, often with two or more species on the same flower at once, as in the photo above. Along with Wild Carrot, Oxeye Daisies are one of the best plants you can grow to attract insects to your garden.

Other English names for Oxeye Daisies include Dog Daisy, Moon Daisy, Horse Daisy, Moonpenny and Marguerite. The “Moon” names probably arise from the way that Oxeye Daisy flowers seem to glow in the twilight on midsummer evenings. Leucanthemum comes from the ancient Greek leucos (white) and anthos (flower). Other members of the genus include Leucanthemum x superbum, the Shasta Daisy, which is like a supersized Oxeye Daisy and is often grown as a garden flower. It is better behaved but I prefer the subtlety of Leucanthemum vulgare. The name “Marguerite” is also used for the daisy Argyranthemum frutescens.

Oxeye Daisies have been introduced to North America, Australia and New Zealand, and in places are an invasive weed. Leucanthemum vulgare is listed in the Invasive Plant Atlas of the United States. The influence of cattle in their spread is rather interesting. If cattle pastures are grazed continuously with a low density of animals, cattle will avoid Oxeye Daisies because don’t really like the taste. They will eat the plants they prefer, and this reduces competition and allows Oxeye Daisies to spread. Around 40% of any Oxeye Daisy seeds that cattle do eat remain viable after passing through the gut, so can be spread to new areas.

I haven’t tried eating Oxeye Daisies yet but the Plants For a Future website tells us that the young leaves can be eaten either raw or cooked. They are “rather pungent [and] should be used sparingly or mixed with other salad plants“. In his book “Around The World In 80 Plants“, Stephen Barstow lists Leucanthemum vulgare as one of 56 species he added to a “tasty” calzone (filled pizza) in June 2010. The roots can be eaten raw as well, and the Plants For a Future website also lists a variety of medicinal uses for the plant. The Raw Edible Plants website says that the whole flower tastes good but numbs the tongue, and that the buds can be used as a substitute for capers.

The Eden Project website has a recipe for Tempura Battered Oxeye Daisies and Wild Food Girl, based in Colorado in the United States, says that “Ox-eye Daisies Are Good Eatin’” and has used them in salads and stir-frys and on tacos. She says they “have a strong and unique, somewhat sweet flavor that I like“. On that recommendation, I think I will give them a try.

If you are in a part of the world where they aren’t an invasive weed and want to grow your own Oxeye Daisies, they are easy to grow from seed in spring or autumn and here in the UK I recommend Emorsgate Seeds as a source for these or other wild flower seeds. Naturescape sell Leucanthemum vulgare as plant plugs.

Once you have some plants and allow them to seed you should never be without them. Each flower head can set up to 200 seeds but seedlings are easy to weed out if you don’t want them.

On our allotment, the plants seed into open soil and, when they grow in the wrong place, I try to move them to where I want them. Now is a good time to do this; they are easy to transplant and will reward you with their lovely flowers and accompanying insect life if you spare them.

Wasp Beetle, Clytus arietis

Wasp Beetle, Clytus arietis, on Oxeye Daisy. (It is a type of Longhorn Beetle that mimics wasps but is completely harmless.)

Posted in Edible, Foraging, Ornamental | Tagged Dog Daisy, Horse Daisy, Leucanthemum vulgare, Marguerite, Moon Daisy, Moonpenny, Ox-eye Daisy, Oxeye Daisy

Manuka, Leptospermum scoparium

Jeremy Bartlett's LET IT GROW blog Posted on 15 January, 2018 by Jeremy Bartlett29 January, 2018
Leptospermum scoparium

Manuka, Leptospermum scoparium, with solitary wasp Sapyga quinquepunctata (May 2017).

Yesterday I walked around the garden, noting what was in flower. In short, not much: stalwarts like Erysimum ‘Bowles’ Mauve’, Erigeron karvinskianus, Winter Heliotrope, Fuchsia microphylla, Coronilla, daisies in the lawn and some trailing Lobelia plants in a sheltered place that have escaped the frost. But, by our south-facing living room wall, our Leptospermum scoparium (Manuka or New Zealand Tea Tree) has started to flower. It will continue to flower into spring, reaching its peak in late May and June.

Leptospermum scoparium is native to Australia and New Zealand, and is a member of the family Myrtaceae, along with the Mediterranean shrub Common Myrtle, Myrtus communis, and well-known Australian plants such as the gum trees, Eucalyptus, and bottlebrushes, Callistemon. The family also contains several spices: the Clove, Syzygium aromaticum, a native of Indonesia, and the Guava, Psidium guajava,  and Allspice, Pimenta dioica, both from Southern and Central America. Bog Myrtle, Myrica gale, a British native, is not a relative – it is in the family Myricaceae.

Leptospermum scoparium is thought to have originated in Australia and then spread to New Zealand, where it is now much commoner. It is a shrub or small tree, typically forming scrub 2 – 5 metres (7 – 16 feet) tall, but capable of growing up to 15 metres (nearly fifty feet). It has small, prickly leaves and pink or white flowers with five petals. It can form dense scrub and is often one of the first species to regenerate on land that has been cleared. It was first grown in the British Isles in 1772 and escaped into the wild on Tresco (Isles of Scilly) in 1935.

I bought my Leptospermum scoparium from Dover Farm Nurseries in Briston in North Norfolk in the spring of 2015. The plant was covered in a mass of flowers and it was an impulse buy. I soon found a space for it underneath the living room window, in a sheltered and sunny spot. I added homemade compost to the poor, sandy and rubbly soil before I planted it and it turns out I had chosen the ideal conditions for it. Leptospermum is hardy to about -5 degrees Celsius (USDA Hardiness Zones 9 -10, equivalent to RHS Hardiness Rating H2 – H3). It seems very happy next to the house, but I remember seeing lots of dead Leptospermum and Callistemon plants after the cold winters of 2009 – 2010 and 2010 – 2011, so I am aware I may have to cover it in severe frosts. In a colder climate, Leptospermum can be grown in a pot, in ericaceous compost. Avoid peat because of the environmental damage its extraction causes – I use alternatives such as wool-based composts.

There are lots of cultivars of Leptospermum, and L. scoparium is not the only species grown. Flower colour ranges from white to deep red-pink and there are dwarf forms as well (L. scoparium nanum). Burncoose Nurseries has photographs and descriptions of many of these. The variety ‘Red Damask‘ is a bit hardier, and is given RHS hardiness rating H4 (hardy to -10 degrees Celsius), but its flowers are partly double and I don’t particularly like them. My own cultivar was labelled ‘Lambertii‘.

Leptospermum means “thin leaves”. Manuka is the Maori name for Leptospermum scoparium. Other names include New Zealand Tea-tree, but tea tree oil comes from a different species, the Australian plant Melaleuca alternifolia, also in the Myrtaceae.

Honeybees make Manuka honey from the nectar of Leptospermum scoparium. The honey is claimed to have antibacterial properties and is a fashionable health food. It has a very distinctive taste, described as “florid, rich and complex“. I like the flavour, though whether the honey is quite worth the high price is debatable. There have been cases of adulteration of Manuka honey and beehives in New Zealand have been damaged, presumably by competitors. News of honey wars have been reported in British newspapers in recent years and there is an ongoing dispute between New Zealand and Australia over the trade marking of the name “Manuka”.

Meanwhile, in the UK, the Tregothnan Estate in Cornwall is growing Manuka and uses the leaves to make a type of tea. (Manuka tea is described as “refreshing” by the Plants For A Future website, though the leaves need to infuse longer than ordinary tea. On the Camper Mate website Adam Hutchinson recorded his experience of making some from fresh leaves, but “sadly, it tasted terrible”.)

Tregothan also produces Manuka honey on a very small scale, but with just twenty 420g jars from the 2016 season, selling at £225 each I don’t think this is any threat to Australian and New Zealand honey producers.

In our own garden, honeybees and bumblebees are attracted to the flowers, along with solitary bees such as the Short-horned Yellow-face Bee, Hylaeus brevicornis and the solitary wasp Sapyga quinquepunctata. The latter more normally visits thyme flowers, and is on the lookout for its prey, Mason Bees (genus Osmia).

Posted in General, Ornamental | Tagged Leptospermum scoparium, Manuka, New Zealand Tea-tree

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