America’s urban forests are on the decline. Forest Service researchers found that tree cover in cities and towns dropped by about 175,000 acres per year between 2009 and 2014. That corresponds to a loss of about 36 million trees annually. Over the same period, the amount of pavement and other impervious surfaces increased by about 167,000 acres per year. The net effect is a loss […]
In our new series we take a closer look at the tree species we see around us every day, dig up their colourful past and look for secrets beneath their leaves. First out is the Hawthorn aka Crataegus Monogyna. Ever noticed the hedgerows snaking through the countryside and lining our fields? Maybe when they’re erupting with delightful little white flowers in spring? Chances are you’re looking at hawthorn. […]
GINKGO BILOBA Class: Ginkgopsida Order: Ginkgoales Family: Ginkgoaceae Ginkgo biloba – The only species that has survived to date on natural habitats in eastern China, as a relic – “living fossil” ever since (in Mesozoic – about 200 million years ago) of the richer genus Ginkgo. Today, Ginkgo biloba is monotypic not only in relation to the genus, but also with regard to family,order and […]
For normal growth and development, plants need certain ecological conditions. The needs of plant species in relation to individual ecological factors are different. Knowledge of the ecological characteristics of woody and herbaceous species in relation to light, humidity, nutrition, is important for practical measures. Ecological groups include plant species that have more or less the same needs in relation to some of the ecological factors. […]
Dendrology – the science of woody species. Greek: dendron – a tree and logos – science. Woody plants – perennial herb with a secondary weight gain. Of the approximately 260 000 known species of seed plants, 80 000 or 25% are woody plants, of which only 630 species of conifers, and the rest is of Angiospermae (Magnoliophyta).