Family: Crassulaceae New Zealand Pigmyweed / Australian Swamp Stonecrop Crassula helmsii Flowering time: June-August. Aquatic perennial. Invasive garden escape. Originally a garden escape or discard from ponds and aquaria. Grows on mud or in water and makes rapid growth. Can be locally abundant around pond margins and in shallow pools. Very invasive, destroying natural habitats. Tiny, stalked, axillary flowers, whitish-pink, 4-petalled, the petals longer than the sepals. The slender trailing and/or erect stems bear fleshy, opposite, linear leaves. Mossy Stonecrop, Crassula tillaea is a native annual

New Zealand Pigmyweed, Crassula helmsii
Studland, Dorset. September 2012