A BRYOPHYTE FLORA OF ESSEX
91
Riccia glauca L.
18: Woodham Walter Common, 1952, F.R. & B.T.W.; garden,
Brock Hill, S. Hanningfield, 1966, E.S.; stubble field, nr. Ongar
Park Woods, 1967, S.T.L.
19: Kelvedon district, 1863, E.G.V.; stubble field opposite
lane to Peyton Hall nr. Berden, 1960, E.S.; top of roadside bank
N. of Quendon, 1960, E.S.
Riccia sorocarpa Bisch.
18: in Mark House Field, Walthamstow, 1800, E.S.; stubble
field close to Navestock Heath, 1958, E.S. & B.T.W.; stubble
field nr. Hanningfield Reservoir, Crowsheath, 1964, E.S.
19: Saffron Walden, 1926, St. J.M.; abundant in stubble
field by railway arch over road nr. Littlebury, 1960, E.S.: stubble
field, nr. Coggeshall Abbey Mill, 1964, E.S.'
Riccia fluitans L.
18: Hog Hill Pond, Hainault, 1800, E.F.; Chingford, Epping
Forest, 1927, D. G. Catcheside; Cuckoo Pits, Epping Forest, 1950,
J.H.G.P.; pond, Fairmead Bottom, Epping Forest, 1959, E.S.;
Earl's Path Pond, Epping Forest, 1964, A.J.H.; still present,
1967, B.T.W.
19: Layer Marney, 1861, E.G.V.; roadside pond north of Hat-
field Heath, 1959, E.S.; ponds by Galley Hill Wood, 1959, E.S.;
wood near Twinstead, Sudbury, 1966, P.J.W. & W.J.S.; pond,
Mark Bushes, Potter Street, 1967, J.M.A.
Ricciocarpus natans (L.) Corda
18: Hog Hill Pond, Hainault, 1800, E.F.; Little Baddow,
1881, H.N.D.: Chigwell, 1917, P. Thompson; still plentiful, 1926,
D. J. Scourfield; Lower Wake Valley Pond, Epping Forest, 1942,
J.H.G.P.; bomb crater in Monk Wood, Epping Forest. 1959, E.S.
& B.T.W.; Earl's Path Pond, 1963, E.S. and 1967, B.T.W.
19: (Recorded in C.C. 2. No specimens traced).
RICCARDIACEAE
Riccardia multifida. (L.) F. S. Gray
18: marshy places in Epping Forest; the Great Bog in Ep-
ping Forest, 1800, E.F.; Epping Forest, 1950, C.P.C.; by ditch,
Ongar Park Woods, 1960, E.S.; very abundant by roadside, High
Woods, Ingatestone, 1962, E.S.
19: (W. Bergholt Heath, 1860, E.G.V.).
Riccardia sinuata (Dicks.) Trev.
18: Theydon Bois, 1923, St J.M.; war time ditch, Wake Arms,
Epping Forest, 1960, E.S.; abundant in brick earth diggings,
Marden Ash nr. Ongar, 1963, E.S.; abundant on wet clay
throughout Epping Forest, 1967, K..T.A.