Flora of Ashdown Forest - Botanical Society of the British Isles

63Rumex conglomeratus. Clustered dock.Recorded in eight tetrads in Hall (1980).This dock is surprisingly rare on the Forest, and may historically have been be overrecordedfor R. sanguineus. It is mainly found in unimproved grassland.It is thought to be increasing in England (Rich & Woodruff 1996). Widespread in Europe3 -+-h..----""------'-+_ south of the Baltic, temperate Asia and North Africa.4 5Rumex sanguineus var. viridis. Wood dock.Common on the Forest (Hall 1980).Probably the commonest, most widespread dock on the Forest, along the edges ofwoodland, hedges, urban areas and car parks.Increasing and widespread in Britain (Rich & Woodruff 1996), and mainly western in3Europe, also south-west Asia and North Africa.4 5Rumex obtusifolius. Broad-leaved dock.Only unrecorded in one square on the Forest which is largely acidic heathland. It is generallysimilar in ecology to R. crispus.Recorded in 98% of the tetrads in Sussex (Hall 1980). Increasing in England (Rich &Woodruff 1996), widespread and common in Britain, Europe, temperate Asia, North Africa3and Japan.45CLUSIACEAE*Hypericum calycinum. Rose-af-Sharen.Tetrad 43Q (Hall 1980), not refound.Woodland north of Twyford car park (408.321), 1984-1994, DB.It has been widely grown in gardens in Britain since it was introduced in 1676, possibly3 +t------Yfroma single clone. It mainly propagates vegetatively and is probably established fromdumped garden rubbish rather than from seed. In Britain about one fiftieth of the natural seed4 5is set as it is self-incompatible, though more seed is set in hot summers (Salisbury 1963,1969a).Native in northern Turkey and south-east Bulgaria where it often occurs on shadyriverbanks and in the understory of oak and beech woods ..Hypericum androsaemum, Tutsan, Sweet amber, Titsum.Ashdown Forest (Whitwell 1902). In a wood leading from Forest Row to Wych Cross (Peters1935). Common on the Forest {Hall 1980).We have usually found one or two plants at each site, mainly in woodlands, with aconcentration of records on the north-facing slopes in the Hindleap and Broadstone areas.3 ---t--I'"...----'"l+_ Seed taken from a plant at St John's in 1991 is now a virulent weed in PW's garden in4 5Surrey, and it reproduces freely. It is often cultivated, and there may be a regular exchange ofseed between gardens and wild areas.In Britain it is common in suitable areas in the south and west and is especially frequentin the Weald and New Forest, with fewer records elsewhere which are often of gardenescapes. It is a strongly western plant in Europe reaching its most northerly limit in Scotland, and also occurring in southwestAsia to northern Iran and north-west Africa.