Foraging in Thessaloniki

Know these first

What can hurt you around Thessaloniki in October

8 species on our hazard list have been recorded near here this month, 4 of which can kill a healthy adult. Learn these before you learn anything you intend to eat.

• Can kill5 records nearby

  Oleander

  Nerium oleander

  Mistaken for

  Nothing edible, but it is planted along roads and in gardens everywhere, and its straight green stems look like ready-made braai skewers.

  How to tell

  A shrub with long, narrow, leathery leaves in pairs or threes, each with a strong pale midrib; clusters of pink, white or red flowers; and long, thin pods of fluffy seeds.

  What it does

  Cardiac glycosides in every part. It is bitter, so serious poisoning is uncommon, but toddlers have died after eating the leaves. Never use its stems as skewers or its leaves for tea.

• Can kill2 records nearby

  Thorn apple (Datura)

  Datura (the whole genus)

  Mistaken for

  Young plants come up among amaranth (morogo) and other wild greens in maize fields and gardens, and children eat the seeds.

  How to tell

  A coarse, rank-smelling plant with large, irregularly toothed leaves, big upright trumpet flowers, white or purple, and a spiny, walnut-sized capsule packed with small dark seeds. Amaranth has smooth-edged leaves and only bristly flower spikes.

  What it does

  Atropine and scopolamine: dry mouth, hot flushed skin, a racing heart, huge pupils, then delirium and hallucinations that can last a day or more. It has killed adults and children.

• Can kill

  1 record nearby

  Small parasols (Lepiota)

  Lepiota (the whole genus)

  Mistaken for

  Shaggy parasol and true parasol mushroom, which are larger relatives worth eating.

  How to tell

  The dangerous ones are small — a cap under about 8 cm — with brown scales on a pale ground and a ring. Size is the whole distinction, and it is not a comfortable one, so the safe rule is to leave every small scaly parasol alone.

  What it does

  Several small Lepiota species carry amatoxins and have killed adults. There is no benefit that justifies the risk.

• Can kill1 record nearby

  Tree tobacco

  Nicotiana glauca

  Mistaken for

  Wild greens: its large, soft leaves have been picked and cooked as a spinach. It is an invasive weed of roadsides, dry riverbeds and waste ground in many parts of Africa.

  How to tell

  A lanky, hairless shrub or small tree with bluish-grey, rubbery, oval leaves up to 20 cm long, and loose clusters of narrow yellow tubular flowers about 5 cm long at the branch tips. No edible green has that waxy blue-grey colour and yellow trumpet.

  What it does

  Anabasine, a nicotine relative: muscle weakness and paralysis that can stop the breathing after a meal of the cooked leaves. Every part is poisonous, raw or cooked, and ingestion has been fatal.

• Hospital6 records nearby

  Euphorbias (milk bushes, naboom, pencil tree)

  Euphorbia (the whole genus)

  Mistaken for

  Prickly pear and other cacti — many African euphorbias are spiny, leafless succulents that look exactly like cacti — and the pencil-stick hedges of Euphorbia tirucalli around farms and villages.

  How to tell

  Break a stem: a euphorbia bleeds white milky latex at once. Cacti such as prickly pear bleed clear or slimy sap, and their spines grow from small fuzzy cushions; euphorbia spines grow singly or in pairs, never from a cushion.

  What it does

  The latex burns skin and mouth, and in the eye can cause temporary blindness. Wear gloves and eye protection near a cut plant, and never rub your eyes.

• Hospital

  4 records nearby

  Pokeweed

  Phytolacca americana

  Mistaken for

  Its shoots are a traditional southern green, and the berries look like elderberries.

  How to tell

  Thick magenta stem and berries in a drooping raceme, each with a flattened top. Elderberries sit in a flat-topped cluster on green stems.

  What it does

  Roots, seeds and mature plant are toxic; the young shoots are eaten only after several changes of boiling water, and people are hospitalised every year for skipping that.

• Hospital1 record nearby

  Syringa (chinaberry)

  Melia azedarach

  Mistaken for

  Children pick up the berries under the trees: it is planted for shade and has run wild in South Africa, where it is called syringa.

  How to tell

  A tree with large, twice-divided leaves of toothed leaflets, sprays of fragrant lilac flowers in spring, and smooth, round, marble-sized berries that turn yellow and hang on the bare branches through winter.

  What it does

  Neurotoxins concentrated in the fruit: vomiting, bloody diarrhoea, confusion and convulsions a few hours after eating. Poisoning has followed as few as six to nine fruits.

• Hospital1 record nearby

  Dwarf elder (danewort)

  Sambucus ebulus

  Mistaken for

  Elder — it carries the same flat white flower heads and black berries.

  How to tell

  Not a shrub: soft green stems 1–2 m (3–6 ft) tall that die back to the ground every winter, growing in dense patches from creeping roots, with leaves that smell foul when crushed and berry heads held upright. Elder is woody, with corky bark, and its ripe berry heads droop.

  What it does

  Every part is poisonous, the seeds especially: vomiting and diarrhoea.

These are recorded within about 40 km of here in this month, from verified public observations. It is not a complete list of what is dangerous — nothing is — and a species missing from it may still be in your woods. Never eat anything identified from a photograph and a description alone.