Grey Poplar - Populus alba x tremula = P. x canescens

Alternative names
Populus x canescens
Description

A natural hybrid between White Poplar and Aspen, and rather variable but intermediate in character between the two.  It exhibits 'hybrid vigour', and can outgrow both parent species, becoming a large tree to 40 metres or more. 

Shoots white downy at first. Leaves rounded-triangular, coarsely and irregularly toothed, not lobed, dark green above, grey downy beneath.  Bracts are laciniate.  As with all poplars, the leaves from suckers and epicormic growth are often atypical and should not be used to identify the species. 

Most trees are male, and the male catkins are greyish becoming red-purple as they mature. Female trees are rare, and have greenish catkins. 

Identification difficulty
Recording advice

Photos of leaves, upper and under-side, from crown long-shoots NOT epicormic/sucker growth.

Habitat

Thrives in damp places such as water margins and damp woods, but also found in hedgerows.

When to see it

Flowers in March or April.

Life History

Deciduous.

UK Status

Widespread, particularly in the southern half of Britain.

VC55 Status

Occasional and local in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 67 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
Grey Poplar
Species group:
flowering plant
Kingdom:
Plantae
Order:
Malpighiales
Family:
Salicaceae
Records on NatureSpot:
16
First record:
21/09/1998 (Anthony Fletcher)
Last record:
09/09/2025 (Smith, Peter)

Total records by month

% of records within its species group

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Latest images

Latest records

Photo of the association

Chaitophorus populeti

The aphid Chaitophorus populeti lives on the young shoots and terminal leaf petioles of various Poplar species, especially those of Aspen and White Poplar and their hybrid Grey Poplar. The body length is 1.5 to 2.9 mm.  The nymphs of this species are distinctively patterned, the adult apterae are black and more difficult unless recorded in association with nymphs.

Photo of the association

Stigmella assimilella

A small moth with a wingspan of 5.4 to 6.2 mm. Adults difficult to distinguish from other Stigmella species, and more frequently recorded in the larval stage where it creates a leaf mine on the leaves of Aspen (Populus tremula) and occasionally Grey Poplar or White Poplar. The initial corridor is contorted, then widening into a blotch-like corridor; central frass line leaving a clear zone either side. 

Photo of the association

Ectoedemia turbidella

The larva of the moth Ectoedemia turbidella 

Photo of the association

Phyllonorycter comparella

The larva of the moth Phyllonorycter comparella makes a mine on the underside of leaves of Grey Poplar, White Poplar and occasionally Hybrid Black Poplar. The mines are small and hard to find on the commonest hosts, Grey or White Poplar; there is little contraction or distortion of the leaf, and the underneath of the mine is hidden in the woolly undersurface of the leaf.

Photo of the association

Phyllocnistis xenia

The larva of the moth Phyllocnistis xenia mines the leaves of Grey Poplar and White Poplar forming a winding, thin, silvery translucent gallery resembling a 'snail trail' on the upper surface of the leaves which leads towards the leaf edge. It then folds the leaf edge over and pupates in a cocoon in the fold.

Photo of the association

Agromyza albitarsis

The larvae of the fly Agromyza albitarsis mine the leaves of Aspen, hybrid Black Poplar, other poplars and willows, forming a large greenish blotch mine which turns brown.