50 THE JOURNAL OF BOTANY 
Rouy and Foucaud, Fl. de France, i. 67 (1893), unite the two 
species under the name of “ ne yllus,” and enumerate twelve 
forms, which may be disposed of as follows :—Godroni and radians 
should be referred to R. diversifolius (they are identical in 
characters and differ only in size, one is twice the size of the other) ; 
Drouetii is the type of R. divaricatus, in which should also be 
included the forms Martini, paucistamineus, lutulentus, and confer- 
voides ; trichophyllus is the type of the present ‘species; tricho- 
ylloides and capillaceus are Hot distinguished from the last by 
any definite eens whatever; britannicus is stated not to 
include any French form, and the trifling differences alleged do 
not apply to the “English plant ; there remains therefore only the 
form filicaulis, which differs only very slightly from typical tricho- 
phyllus and includes Norman examples referred to in the nex 
paragraph. 
Var. 1. COMMUNIS, 
forma TYPICA: ut supra. 
As far as the British Isles are ae ar both species were 
treated as a combined unit in Watson’s Topographical Botany, 
assign the countries rightly for either; and the same holds for 
Cybele Hibernica, ed. 2 (1898), where the two species are united. 
Among the English counties, R. trichophyllus has not yet been 
definitely reported from Cornwall, Nottinghamshire, and North- 
umberland. In Wales it has been only reported from two 
counties :—in Carnarvonshire, near the inlet of Liv. an-afon Aber, 
and reservoir on Great Orme’s Head (J. E. Griffith, Flora, p. 2; 
1895), and in Glamorgan, on Llangenydd marshes and at Cowbridge 
(H. J. Riddelsdell, Flora, p. 5, in Journ. Bot. 1907, Suppl.). In 
Scotland, it extends north of the Caledonian Canal as far as the 
Orkney Islands. South of the Caledonian Canal it is recorded in 
nine counties a gape -shire (Scott Elliot, Flora, 1896), Kirkeud- 
a Array yrshire (P. Ewing, Glasgow Cat. Pl. 1899, 
p- 2), Lana ° (Brit. Assoc. Handb. 1901, p. 112), Stirlingshire 
(Dr. "Stirling ex 0% Ewing, Glasgow Cat. Pl. 1899, p . 2), Perthshire, 
where it ascends to 300 metres above the hamlet of  Gordennehlock 
' 47) om, 8. 
Dumbartonshire Sarre ex a Ewing, l.c.), Buteshire (W. Galt). 
umfries-shire, it ascends to 180 met Scott 
Lidice; Vides ob o metres at Capplegill (Se 
n Switzerland, it occurs at 2580 metres in a little mountain 
lake in the Sertig Valley, near the sulphur-baths of Clavadel, 
canton : scemannens (Overton ex Bull. Herb. Boiss. — p. 690). 
I know of no greater altitude for the species having been recorded, 
though I have searched through several geographical plait telists. 
Forma Fiticautis Rowy et Fouc. Fl. de France, i. 69 (1893). 
Caulis filiformis. Folia 14-2 em. gre tie filiformes folia 
Flores mediocres. n diam etala 
calyce duplo longiora.. Selo fir fruotu leviter ibleyada, breviter 
apiculata, rostello recurvato. 
