Trinity tree of the month - the Common Lime

Posted on: 28 February 2024

There are about 30 species of Tilia,, with the Common Lime being a hybrid of two of these species (Tilia platyphyllos and Tilia cordata).  They can grow up to 50 metres tall and live a long life. Common Lime has frequently been planted as an urban/street tree, storing up to 5,000 kg carbon per tree when fully mature. Tilia is hermaphrodite which means the flowers contain both male and female parts. They have impressive flowing bracts, which aid in seed dispersal and are highly scented.

The Common Lime supports biodiversity by enhancing soil nutrients and attracting pollinating insects.  In fact, when the tree is in full bloom bees often visit in such large numbers that humming can be heard several metres away. They’re susceptible to aphid infestations, which feed on the sugars in the leaves. The aphids excrete a sticky substance known as honeydew, causing sooty mould to develop. However, the aphids in turn serve as food for ladybirds, hoverflies and many bird species.  The leaves also provide food for the larvae of many species of moth.

These trees occur generally as planted specimens. Limes have often been planted in woodlands of large estates in Ireland and as such may form part of semi-natural woodland, though they are apparently always planted.  Lime pollen, which is never produced in as great a quantity as for wind pollinated species such as Oak, Birch or Pine, has been found in Irish interglacial sediments, but Lime failed to recolonise Ireland after the last glacial period.

If you’d like to see our Common Lime trees, head down to the Parsons Building and you will spot them. 

Thanks to John Parnell, David Hackett and Estates and Facilities for the information, and for keeping our trees in good health and to Stephen Waldren and Michelle Murray for their expertise.  

• Tags:
• Sustainability