The Essex Naturalist
119
R. leucostachys Schleicher ex Sm. - One bush on Thornwood Common,
TL4704. One or two bushes at Broadstrood, TQ4399. A regional endemic in
south-east England with few sites north of the Thames.
R. lindleianus Lees - Frequent in five sites in the forest. Widespread in Britain
and north-west Europe.
R. lintonii Focke - New to Essex, from the Rushey Plain/Claypit Hill area in
TQ4198. A widely scattered endemic recorded from Norfolk, Hertfordshire,
Oxfordshire and Staffordshire in fewer than ten 10km squares.
R. milesii A. Newton - Co-dominant through most of the forest. A widespread
endemic in southern England.
R. newbridgensis W.C. Barton & Riddelsd. - One clump at the east end of the
"Woodyard" car park area, TL4703, in the Lower Forest. A. Newton has
collected it in the past from west of the Wake Arms. A scarce regional
endemic, in south-east England.
R. pannosus P. J. Muell. & Wirtg. - The plant included in Watson (1958) as
R. gravetii (Boul. ex Sundre) W.C.R. Wats. and subsequently excluded from
Edees 6k Newton (1988) has been determined by H E Weber and G Maztke-
Hajek as R. pannosus, a plant of the Eifel district of south-west Germany. It is
co-dominant in the High Beach area of the Forest and also occurs in north
Norfolk.
R. pergratus Blanch. - Naturalised North American alien which is frequent
and forms dense thickets in Hill Wood, TQ4097.
R. pervalidus E.S. Edees - The Holotype was collected hy W.C.R. Watson
from Broadstrood in 1937 and equated with R. atrocaulis. P.J. Muell., which is
not British. The present name was published in 1978. I have not re-found it at
Broadstrood, but have located it near the Jack's Hill car park, TQ4399 and on
the Nursery Ground, TQ4196. The only other known site is in Surrey.
R. polyanthemus Lindeb. - Co-dominant. One of the commonest British
brambles, also present in north-west Europe.
R. powellii Rogers - Formerly described as "Abundant and remarkably constant
over the more elevated parts of Epping Forest" (Rogers 1900). During the
present survey, I found a few very small bushes adjacent to the Furze Ground
and two larger bushes to the south-east side of Little Monk Wood, TQ4298
and TQ4398. An Epping Forest endemic.
R. pyramidalis Kalt. - One small bush at Broadstrood, TQ4399. Widely
scattered in Britain and Ireland. Widespread in north-west Europe.
R. rufescens Lef. & Muell. - Scarce. Hill Wood and High Beech, TQ4096 and
TQ4097. Widespread in southern Britain and western Europe, preferring less
acid soils.
R. sprengelii Weihe - Common throughout much of the forest and also in
southern Britain. Widespread on the continent of Europe.