number : 1 tot 3 per m2
- alone or in small tuft (A) - groups of 10 to 20 plants, even more (C)
Plant description
Euphorbia palustris or swamp spurge grows along waterfronts in Eurasia. The plant forms a thick stem with lanceolate leaves. Flowers appear in May-June. The species prefers moist and nutrient-rich soils.