4 
MONTIA 
(a) M. fontana var. lamprosperma Fenzl in Ledebour FI. Ross, ii, pt. i, 152 (1844); M. fontana L. Sp. 
PI. 87 (1753)! in sensu stricto, excl. syn. Micheli, Dillenius, Plukenet, Vaillant, Petiver, et Bauhin ; Druce in 
Rep. Bot. Exch. Club Brit, for 1908 ii, 330 (1909); M. rivularis Gmelin FI. Bad. i, 302 (1805) partim ; Ostenfeld 
in Warming Bot. Faeroes i, 73 (1901); M. lamprosperma Chamisso in Limiaea vi, 564 (1831); Hallier und 
Wohlfarth in Koch’s Syn. 896 (1892); Druce in Ann. Scot. Nat. Hist. 12 1 (1909); M. fontana var. rivularis 
Syme Eng. Bot. ii, 136 (1864) partim; M. minor var. lamprosperma Rouy et Foucaud FI. France iii, 316 (1896), 
incl. subsp. rividaris part.; M. fontana subsp. lamprosperma Lindberg in Med. Soc. Fauna et Flora Fenn. 21 
(1901); Beeby in Ann. Scot. Nat. Hist. 105 (1909). 
leones: — FI. Dan. t. 131, as M. fontana ; t. 1926, as M. fontana var. major. 
Camb. Brit. FI. iii. Plate j. (a) Flowering shoots, (b) Seeds (much enlarged). Perthshire (G. C. D.). 
Exsiccata : — Herb. FI. Ingric. ii, 239, as M. fontana. 
Annual. Seeds reticulate or finely granular on the edges, light brown to blackish brown in 
colour, shining. 
Seeds of this variety have been sent to me by Mr Clement Reid from the interglacial beds at Redhall, near Edinburgh. 
(/ 3 ) var. lamprosperma forma 
boreo-rivularis Druce in Moss Camb. 
Brit. FI. iii, 4 ; M. fontana var. major 
Wallroth in Linnaea xiv, 546 (1840) 
non Schrader ; M. fontana var. rivu- 
laris Syme Eng. Bot. ii, 136 (1864) 
partim ; M. fontana subsp. lampro- 
sperma var. boreo-rivularis Lindberg 
in Med. Soc. Fauna et FI. Fenn. 21 
(1901). 
Exsiccata : — Dorfler, 5060, as 
M. lamprosperma var. boreo-rividaris ; 
Fellman, 100, 1863, as M. fontana\ 
Fries, xiv, 58, as M. fontana var. 
rivularis ; FI. Exsicc. Austro- Hung., 
2050, as M. rivularis. 
Biennial or perennial, almost 
submerged under water, upper 
part of shoot only emerging and 
usually of a darker green than 
the land form, fnflorescence axil- 
lary. Flowers often cleistoga- 
mous. Capsule smaller. Seeds 
usually larger, finely reticulate, 
shining, usually paler brown in 
colour. 
This is simply the water-form of 
var. lamprosperma ; it occurs in the 
well-aerated waters of springs, rills, 
or shallow pools on acidic soils in 
the hilly and northern parts of the 
British Isles ; locally common. It 
ascends to 820 m. in Austria. 
M. fontana var. lamprosperma 
occurs from Glamorganshire and 
Derbyshire northwards to Zetland ; 
Ireland — counties Galway, Sligo, and 
Down ; from near sea-level in Kirk- 
cudbrightshire to 1036 m. in Aber- 
deenshire. 
northern Germany, France, central Europe (up to 2200 m.), Russia; Arctic 
Faeroes and Iceland (the only 
form), Scandinavia (the only form), 
and Denmark (the prevailing form), 
America, the Andes, and Greenland. 
