The fascinating garden at Knepp Castle in Sussex, home to ‘Wilding’ author Isabella Tree, reopens for the scheme this year. Credit: NGS
24.07.2023 - 12:25 / hgic.clemson.edu
Infrequently in the spring, you might see an orange, slimy substance slowly oozing from a wound on a hardwood tree. This is a fungus or a complex of fungi and yeast that colonize the sap that leaks from a tree wound. The primary fungus involved that gives this slime its orange color is Fusicolla merismoides (formerly called Fusarium merismoides).
Although this slime looks rather disgusting coming from your prize hardwood tree, it is actually harmless. It is very similar to wetwood or slime flux, which are caused by either bacteria or both bacteria and yeasts. The orange slime fungi are simply growing on the carbohydrates (sugars) and moisture in the sap, but they do not cause diseases of the tree’s wood or foliage. These fungi thrive in the spring as the sap is rising and leaking from wounds on tree trunks or limbs.
During March of this year, a river birch at the State Botanical Garden in Clemson was found with a minor sap infection of Fusicolla orange slime.
At least the color was Clemson orange!
The fascinating garden at Knepp Castle in Sussex, home to ‘Wilding’ author Isabella Tree, reopens for the scheme this year. Credit: NGS
New Trees: Recent Introductions to Cultivation by John Grimshaw, Ross Bayton and illustrated by Hazel Wilks. Amazon
The best trees for chalk soil conditions tend to be locally grown and not be Dutch imports. In fact they resemble shrubs more than trees but there are the odd exception that are tree like.
An unusual tree with even more unusual fruit.
Avoiding early onset of death caused by disease or climate change will affect the trees we plant in the future. Gardeners must consider tree selection carefully bearing in mind more than aesthetics and utility. Economics of forestry have increased there relevance to Britain as (the dreaded by some) Brexit nears. We import and export more wood than in previous years but with those extra tree miles comes risks. Toxins pests and disease are to readily spread from one country to another. CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) is designed to protect over-exploitation and endangerment through international trade.
Fascinating leaves are grown on this unique tree that has been around for over 200 million years. Last one of a kind the Ginkgo has no close relatives. Now famous for its extracts and herbal remedies it is also a revered tree in the Buddhist religion.
Flowering Cherry trees contribute most to the floral pageantry of spring blossom and they are easy to grow. Cherries are graceful and well shaped trees and many varieties have excellent Autumn colour. (Scarlet leaves of Prunus sargentii and pubesens, yellow of hybrids Pandora or Tai-Haku or coppery Ukon.)
Liriodendron tulipifera or Tulip tree is a tall striking tree related to the magnolia with similar Tulip shaped flowers. It has been planted in Britain since 1688 as an ornamental parks and gardens tree.
Credits Quiver Tree by hibbijibbies CC BY-ND 2.0 “Midas tree by Paul WatsonCC BY-NC-SA 2.0
Hippophae Rhamnoides also called Sea Buckthorn, is related to Elaeganeous and is shown here and below with it’s heavy crop of attractive Apricot coloured berries. The shrub can grow to over 15 feet but makes a nice ornamental feature. It flowers in spring followed by narrow silvery leaves through summer. Each plant is either male or female and you need both for pollination and only the female produces these great berries.
I used to think Beech trees grew on the beach but now I know a little better but not much. This is one of the UK’s most useful trees and deserves to be grown where ever space permits.