Sycamore - Acer pseudoplatanus

Description

Large spreading tree to 30 metres. Leaves large, 10 to 25 cm across, palmately 5 to 7 lobed, the lobes pointed and coarsely toothed. Flowers yellowish green, 6 to 7 mm in narrow pendant panicles usually borne with the leaves. Fruit with wings at right angles.

Identification difficulty
Habitat

Hedgerows, roadsides, woods.

When to see it

April and May.

Life History

Deciduous.

UK Status

Naturalised and common throughout just about the whole of Britain.

VC55 Status

Very common in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 546 of the 617 tetrads.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Species profile

Common names
Sycamore
Species group:
flowering plant
Kingdom:
Plantae
Order:
Sapindales
Family:
Sapindaceae
Records on NatureSpot:
453
First record:
01/01/1979 (Patricia Evans)
Last record:
31/10/2025 (Smith, Peter)

Total records by month

% of records within its species group

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Stigmella speciosa

A small moth with a wingspan of 4 to 5 mm. The adults of this tiny species have bronzy wings tinged with purple and a narrow silvery fascia. The larvae mine the leaves of Acer species, usually Sycamore. The mine is a full depth corridor, quite variable in length and width. Also the frass pattern is very variable:  sometimes a narrow continuous line, sometimes a broad zone. Always there remains a clear zone between the frass and the side of the mine; also the frass is never coiled.

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Phyllonorycter geniculella

Phyllonorycter geniculella is a small moth with a wingspan of 8 mm. It is a beautiful but tiny species, having a white base colour with rufous, darker-edged chevrons, the first of which often 'extrudes' into the next.  The larva mines the leaves of Sycamore. The mine is rounded, between the veins.

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Caloptilia honoratella

Caloptilia honoratella is a small moth. It's general colouration is a deep cream colour with brown ‘inverted V’ and other markings. The larva feeds on Sycamore producing a silvery upper surface leafmine.

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Caloptilia semifascia

Caloptilia semifascia is a small moth with a wingspan of 10 to 12 mm. The angled light streak starting at the leading edge of the forewing is characteristic, but it can be obscured on darker specimens. The larva mines the leaves of Sycamore, Field Maple and Norway Maple. The early mine is a gallery leading to a squarish blotch. It later forms up to three successive tubes or cones by folding the tips of leaves downwards . The moth must be bred to identify to species.

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Heterarthrus cuneifrons

The larvae of the sawfly Heterarthrus cuneifrons mine the leaves of Sycamore, forming a large, central blotch mine, rarely reaching the edge of the leaf.

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Heterarthrus fiora

The larvae of the sawfly Heterarthrus fiora mine the leaves of Sycamore (Acer pseudoplatanus) producing a large upper-surface (often almost full depth) blotch, without a trace of an initial corridor, beginning in the very tip of a leaf segment. The full grown larva spins itself a disc shaped cocoon within the mine having previously has made a circle of perforations in the upper epidermis with its mandibles. The cocoon is formed, attached to the upper epidermis, and the larva becomes immobile. The perforated circle of epidermis starts to dry, warps, and finally becomes detached from the surrounding tissue and drops to the ground. The resulting excision has a diameter of about 7 mm, and is best seen when the leaf is held against the light (Bladmineerders van Europa).

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Drepanosiphum platanoidis

All adult Drepanosiphum platanoidis aphids are winged and range in size from 3.2 to 4.3 mm long. They have red eyes, a brown thorax, and a pale green abdomen. The upper surface of the abdomen has up to 5 or 6 variably developed dark cross-bars. Early in the year these cross bars may be reduced or absent altogether. The two tubes (siphunculi) at the rear end are pale, long and thick. Nymphs lack wings and are all green. This aphid spends all year on Sycamore.

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Periphyllus acericola

Periphyllus acericola colonies occur on the undersides of Sycamore leaves. Alates with closely spaced, black, abdominal cross-bars and black pterostigmata. White "dimorph" nymphs in dense groups.

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Horse-chestnut Leaf-miner

The larva of the Horse-chestnut Leaf-miner moth (Cameraria ohridella) mines the leaves of  Horse-chestnut and occasionally Sycamore and other species. On its main host, Horse-chestnut, there can be many mines on a leaf and this moth can cause serious defoliation.

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Aceria pseudoplatani agg.

Aceria pseudoplatani agg. mites  cause an erineum to form on Sycamore, usually on the leaf underside.  The mites live amongst the hairs of the erineum, which is pale to begin with and brown later; the individual hairs (use a hand lens) are long and tapering.  On purple-leaved varieties, the erineum is flushed pink. There are often corresponding blister like, yellowish bumps on the upper leaf surface.

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Aceria cephalonea

The mite Aceria cephalonea causes small red pouch galls on the upper surface of Sycamore leaves. When fullty developed in summer, the galls are less than 3mm high with a rounded apex. 

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Aceria macrorhyncha

The mite Aceria macrorhyncha causes a red pouch gall on the upper surface of Sycamore leaves.  When fully developed in late summer, the galls are up to 6mm high, with a pointed apex.