98 
The Irish Naturalist. 
April. 
should therefore be altogether excluded from our British 
lists," or if mentioned should be given their true status. 
The one exception referred to is var. longipedunculatum, 
F. Schultz, the best known locahties for which are Gullane 
Links, Haddingtonshire, and Duddingston Loch, Midlothian. 
Herbaria contain a good many instances of it, more or less 
disguised, from scattered localities ; but I believe that, in 
spite of their disguise, they are all forms of one thing, again 
varying with the surroundings. The most interesting fact 
here relevant is that it sometimes closely simulates H. 
repens, Koch. Botanists often apply this latter name 
to a compact, strongly rooting form of H. nodiflorum 
type which bears no resemblance to H. repens ; less often 
but far more excusably, to a form of var. longipedunculatum 
which is very much like H. repens. For in exposed parts 
of some of the localities where this variety grows, say, in 
muddy spots, or in the more central parts of shallow pools 
(as at Gullane), it assumes a form which I will venture to 
call f. simulans (valde simulat H. repens, involucrum 
autem, et foliolos, et fructum var. longipedunculati habet ; 
necnon in horto culta vertitur in var. longipedunculatum). 
This form corresponds in essentials to the variety, but is 
small, prostrate, and rooting ; its habit very strongly 
resembles that of H. repens, but it goes off by degrees to 
the ordinary form of the variety, as is shown by a study 
of all the available material from Gullane. The variety, 
indeed, behaves just as does type nodiflorum, varying under 
the influence of its surroundings, even to the extent of pro- 
ducing more than one form from the same root {see M. 
Cowan in B.E.C. Report, 1910, p. 564-5). And f. simulans 
from Port Meadow was grovm on in a garden, and produced 
var. longipedunculatum. 
The locahties to which I am able to trace the variety 
in its different shapes are : — 
OxON. (Port Meadow and Binsey Meadows, Hb. 
Druce). 
Cambs. (Sturbridge Fair Green, and Upware, Hb. 
Babington ; and Haddingham sp. comm. Prof. 
Gluck.) 
