A CONTRIBUTION TO THE FLORA OF THE COUNTY. 231
var. aquaticum Sanio.
Kelvedon (8) !
Group Kneiffii Ren.
N. Essex (14); Loughton Forest (13).
var. polycarpon Bland.
Norton Heath !!
var. intermedium Schimp.
Norton Heath !!
Group pseudo-fluitans Sanio.
var. paternum Sanio.
Kelvedon (8) !; High Easter !!
H. fluitans Linn.
The following in the absence of specimens cannot be
placed; some may belong to the next species.
Thomas Warner's gravel pit in the Forest near
Woodford Row (2); "pond in Greenleaves Lane,"
Walthamstow (2); in Walthamstow Marshes (2); nr.
Chelmsford (7); N. Essex (14); Saffron Walden (9).
Group Amphibium Ren.
var. jeanbernati Ren.
Loughton !!; Warley Common !!
H. exannulatum Gumb.
"Scarce, Epping Forest" (11).
Group Typicum Ren.
var. pinnatum Boul.
Cuckoo Pits, Chingford !!; Tiptree Heath (8) !
var. pinnatum forma stemphylioides Ren.
Epping Forest in a gravel pit (11) !; Epping Forest
(19); nr. the Earl's Path, High Beach !!; nr. the
Rising Sun, Walthamstow!!; Norton Heath !!; Mill
Green Common (approaching the var. brachydictyon.
—J.A.W.) !!
var. brachydictyon Ren.
Norton Heath !!; Galleywood Common (8) !!; West
Bergholt Heath (an extreme form diverging strongly
towards var. pinnatum, due to the less alpine habitat.
J.A.W.) (8) !
var. molluscum Sanio.
Leyton, Epping Forest !!