THE BOG-MOSSES OF ESSEX. 115
S. molluscum forma robusta Warnst.
Between Theydon and Wake Anns !!; Warley
Common !!
SPHAGNA RIGIDA.
S. compactum D.C.
N. Essex (Dixon).
var. imbricatum Warnst.
High Beach (Varenne) !; Thomas' Quarters, Epping
Forest !!; Tiptree Heath (Varenne) !!
var. subsquarrosum Warnst.
Tiptree Heath !!
SPHAGNA SUBSECUNDA.
[The classification of the species comprising this group rests
primarily upon the distribution of the pores on the inner and
outer surfaces of the branch leaves, and since almost all possible
variations occur, and plants with very varying appearance have
a similar distribution of pores, the classification becomes
exceedingly difficult. I have regarded all the forms having a
conspicuously greater number of pores on the outer surface of
the leaf and the stem leaves of medium size as belonging to
S. inundatum—the type of the group I have failed to find in the
county. It is possible that all the forms may have to be
regarded as varieties of one and the same species, so closely do
they run to one another and so little does the habit seem to be
correlated with the anatomical characters in many of them.]
S. inundatum Warnst.
"On the forest by the road from Debden Green to the
camp, Ambres' Banks" (Forster) !; Thomas Quarters,
Epping Forest !!; Wake Valley !!; Strawberry Hill,
Epping Forest !!; nr. Mt. Pleasant, Epping Forest !!;
Great Monk Wood !!; nr. Rising Sun, Walthamstow !!
and other parts of Epping Forest near High Beach;
N. Weald, Epping Lower Forest!!; Hainhault
Forest! !; Norton Heath !!; Mill Green Common !!;
Warley Common (Varenne) !!; Linguard Common !!;
Tiptree Heath (Varenne) !!; Little Baddow
Common !!; nr. Chelmsford (Greenwood); Galleywood
Common (Varenne) !!