Euphorbia heterophylla L.

Japanese Poinsettia

Annual herb to 80 cm high, multi-stemmed, each stem generally unbranched. Leaves alternate, loosely clustered near the top of flowering stems but not arranged in a whorl-head; blades on stems ovate, up to 120 mm long, and 60 mm wide; floral head umbel with 5 rays, generally unforked. Cyathia 2-2.5 mm wide; glands 1, funnel-shaped, red-rimmed.

Mexico, USA, S America.

Source: Forster, P. (2002). Euphorbiaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Rosanae
order      Malpighiales
family       Euphorbiaceae
genus        Euphorbia L.