In our busy lives, with so much information being flung at us all the time, anything that helps us to remember useful facts without immediately resorting to Dr Google is valuable. For example, Every Good Boy Deserves Favour spells out the five lines of the treble clef. And I have a friend who can recite the whole of the rhyme reciting the royal monarchs starting Willy, Willy, Harry, Ste,
Harry, Dick, John, Harry three,
One, two, three Neds, Richard two….
The botanical world is not immune from mnemonics of this kind. Ed, a volunteer colleague at NT Osterley House and Garden, recently taught me this rhyme:
Sedges have edges, rushes are round, grasses have knees that bend to the ground.
Sure enough, sedges have triangular stems and a mature grass stem is jointed with a series of nodes along its length.
During our Friday volunteer stints we chat a great deal about plants and try our best to name what we’re weeding out or trimming back. Coincidentally on the same day that I learnt the rhyme, Jasper, assistant gardener, showed us a quick method of identifying a couple of shrubs and trees when they are not in flower. He demonstrated that dogwoods (Cornus) have ‘elasticated’ leaves. If you tear the leaf in half across the way, you can gently stretch the central rib so that the two halves of the leaf remain connected by the stretched rib. And he pointed out that cherry leaves have nectaries at the place where the leaf stalk joins the branch. Sure enough, when I got home I checked my Snow Goose cherry tree and there they were: little nodes at the base of every leaf. Intrigued as to their purpose, I found this theory on the website of the Oxford University Herbarium:
At the base of the blade of a cherry leaf there are two extrafloral nectaries, which are thought to protect the plant’s leaves from damage by herbivorous insects. The nectaries attract ants by producing small quantities of sugar-rich nectar, which appears to encourage additional patrolling by ants. If the ants encounter any caterpillars they aggressively defend the leaf, even carrying the offending animal back to their nests.
I can’t help considering the irony of the caterpillars I’m so keen to attract to the garden being prey to marauding ants. No ant activity on the tree to report to date!

Whilst writing the notes for a recent talk I gave about planting wildflowers in the garden to attract butterflies and moths, the mint family came up several times. I was reminded that a shortcut to identifying members of this large plant family, which are also called the dead-nettles (Lamiaceae), is that they have square stems. Just a light touch of the thumb and forefinger around the stem reveals the stem’s angled sides. By the way, red dead-nettle, water mint, betony and selfheal are all well-behaved wildflowers to introduce into the garden. The first two are caterpillar food plants for several species of moth, and the flowers of the last two are rich in nectar for butterflies and other pollinators.

Another gardening friend of mine distinguishes beech and hornbeam by noting that hornbeam leaves have toothed edges and beech leaves have wavy edges. When I visited Kathy Brown’s Stevington Manor Garden near Bedford yesterday, I asked Kathy if she had any quick routes to plant identification. She opened up a whole new dimension to the topic by introducing the element of light: how it plays upon a leaf or indeed the whole plant. For example, hornbeam leaves are matte and beech leaves shiny. And pointing towards tall grasses in a nearby border she showed me that light reflects off the graceful Miscanthus making it shimmer, whilst the nearby Calamagrostis overdam absorbs the sunlight and appears more solid and blocky.
I referred to the mint family earlier, one member of which is lavender. I can’t mention to the visit to Kathy Brown’s Garden without praising her fabulous edible flower cakes, not least the lavender and lemon drizzle cake. The lavender is harvested from the borders in front of the topiary jury scene in the Formal Garden. The 4.5 acre garden beside the meadows of the Great Ouse is a joy, with ‘rooms’ inspired not only by historic gardens but also great works of art. The ‘Art Gardens’ include two purple beech and Berberis lined chambers evoking Mark Rothko’s Seagram Murals. With not a drop of water in sight, Kathy and her husband Simon have recreated Claude Monet’s Water Lilies using grasses, Echinacea and Geranium Rozanne to emulate the muted shades of gold, white and violet in the paintings. There is great deal more to this garden than this and I strongly recommend a visit there this summer: details of opening times are on the website, linked above.



Do you have quick, non-digital ways to identify plants? I’d love to hear about them. As I write this it’s 28°C in the shade, so I shall sign off for now and retreat to a cool spot to ponder the endless variations in form, texture, colour we find in plants.
Kew Gardens, 11 July 2025




























































































































































































































