cultivars, and C. sasanqua with over 300 named cultivars. Popular hybrids include C. × hiemalis (C. japonica × C. sasanqua) and C. × williamsii (C. japonica × C. saluenensis). Some varieties can grow to a considerable size, up to , though more compact cultivars are available. They are frequently planted in woodland settings, alongside other calcifuges such as rhododendrons, and are particularly associated with areas of high soil acidity, such as Cornwall and Devon in the UK. They are highly valued for their very early flowering, often among the first flowers to appear in the late winter. Late frosts can damage the flower buds, resulting in misshapen flowers. There is great variety of flower forms: single (flat, bowl- or cup-shaped) semi-double (rows of large outer petals, with the centre comprising mixed petals and stamens) double: paeony form (convex mass of irregular petals and petaloids with hidden stamens) anemone form (one or more rows of outer petals, with mixed petaloids and stamens in the centre) rose form (overlapping petals showing stamens in a concave centre when open) formal double (rows of overlapping petals with hidden stamens) AGM cultivars The following hybrid cultivars have gained the Royal Horticultural Society's Award of Garden Merit: Species Plants of the World Online currently includes: Camellia albata Orel & Curry Camellia amplexicaulis (Pit.) Cohen-Stuart Camellia amplexifolia Merr. & Chun Camellia anlungensis Hung T.Chang Camellia assimiloides Sealy Camellia aurea Hung T.Chang Camellia azalea C.F.Wei Camellia brevistyla (Hayata) Cohen-Stuart Camellia bugiamapensis Orel, Curry, Luu & Q.D.Nguyen Camellia campanulata Orel, Curry & Luu Camellia candida Hung T.Chang Camellia capitata Orel, Curry & Luu Camellia cattienensis Orel Camellia caudata Wall. Camellia chekiangoleosa Hu Camellia cherryana Orel Camellia chinmeiae S.L.Lee & T.Y.A.Yang Camellia chrysanthoides Hung T.Chang Camellia concinna Orel & Curry Camellia connata (Craib) Craib Camellia corallina (Gagnep.) Sealy Camellia cordifolia (F.P.Metcalf) Nakai Camellia costata S.Y.Hu & S.Y.Liang Camellia costei H.Lév. Camellia crapnelliana Tutcher – Crapnell's camellia Camellia crassicolumna Hung T.Chang Camellia crassipes Sealy Camellia crassiphylla Ninh & Hakoda Camellia cuongiana Orel & Curry Camellia cupiformis T.L.Ming Camellia curryana Orel & Luu Camellia cuspidata (Kochs) Bean Camellia dalatensis V.D.Luong, Ninh & Hakoda Camellia debaoensis R.C.Hu & Y.Q.Liufu Camellia decora Orel, Curry & Luu Camellia dilinhensis Ninh & V.D.Luong Camellia dongnaicensis Orel Camellia dormoyana (Pierre ex Laness.) Sealy Camellia drupifera Lour. Camellia duyana Orel, Curry & Luu Camellia edithae Hance Camellia elizabethae Orel & Curry Camellia elongata (Rehder & E.H.Wilson) Rehder Camellia