Low spreading habit or erect to 1m, similar to H. alyssoides but leaves generally broader, grey-downy. Flowers 3cm across, rich yellow without (var. concolor) or with a crescentic mahogany blotch near the base of each petal. H.l. subsp. formosum, syn. Cistus formosus, Helianthemum formosum, from the Algarve has flowers to 6cm wide with deeper yellow centres and larger blotches - an outstanding plant. Portugal and Spain. Fairly hardy.