Balkan Spurge - Euphorbia oblongata

Alternative names
Egg-leaf Spurge and as Oblong Spurge
Description

Euphorbia oblongata is a hairy, rhizomatous herb growing to a maximum height of just over half a metre. It has oval shaped or narrow leaves with finely toothed edges which are 4 to 6 centimetres long. The foliage is green to yellow-green. The inflorescences hold tiny glandular flowers. The fruit is a spherical capsule about half a centimetre long which contains smooth brown seeds.

Similar Species

Several other tall non-native spurges may be found as garden escapes or casual introductions

Identification difficulty
ID checklist (your specimen should have all of these features)

The glands on the cyathium (the cup shaped structure that bears the male and female flowers) are rounded on the outer edge; the ovary and capsule are papillose (with small pimples or warts)

Recording advice

Photo of the plant in its habitat, with details of flowers and capsule

Habitat

Various habitats including waste and disturbed ground, fields and verges.

When to see it

Flowering from May onwards with fruit capsules from July.

Life History

Perennial.

UK Status

This species is widespread and probably becoming more frequent in Britain

VC55 Status

Rare in Leicestershire and Rutland. It was not recorded in the 1979 Flora survey of Leicestershire.

It is not listed in the current checklist (Jeeves, 2011)

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
Balkan Spurge
Species group:
flowering plant
Kingdom:
Plantae
Order:
Malpighiales
Family:
Euphorbiaceae
Records on NatureSpot:
10
First record:
09/05/2014 (Calow, Graham)
Last record:
04/06/2025 (Cunningham, Sally)

Total records by month

% of records within its species group

10km squares with records

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Latest images

Latest records

Photo of the association

Macrosiphum euphorbiellum

Macrosiphum euphorbiellum lives year-round among the leaves of spurge. Apterae are spindle-shaped and 2.0 - 4.0 mm long. They are usually green, with dark femoral apices ("knees") and long siphunculi that are dark only at the tips.  The sixth segment of each antenna has a terminal process that is 4.2 to 5.2 times the length of the base. Alates are similar but also have brownish markings on the head and thorax.