854 ON NAJAS MARINA L. AS A BRITISH PLANT. 
Distribution:—Evrore. Norway!, Denmark, Sweden!, Slesv.- 
Holstein!, Belgium!, Holland, France!, Spain, Germany!, Switzer- 
land!, Italy!, Hungary!, cess Transsylvania! and adjoining 
states, N. Russia!, Lithuan 
Asta, Siberia!, Afghanistan ant Arabia!, Caucasus!. 
AFRICA. (Bourbo on!, same sp 
cope N.. United St ates! ee. Florida}, W. Indies!. 
Exxsiccata :—Fries, ey Nov. iv., 84!; Hansen, oe Slesv.- 
Holstein, 948!; Wirtgen, Herb. pl. sel, Rhen., ed. 2, 523!; Herb. 
pl. crit., 247!; Reich., Fl. Germ., 560!, 1102! ; See or Gall, 
et Germ., 2383!; Bee, Fi. Ingrica. Cat., x.!; Curtis, N- 
American Plants, 2705! 
Plant entirely submerged. — ane long, from the base 
and lower nodes. oe m 3 in. in British specimens 
(simple small sample) beteibhines, ‘from the base, wit 
cele. tae yasad: § eth. Leaves opposite, linear, 4 in. to 
2 in. long, Pepe REO fe ucron ; the apex, when fresh, 
aths entire. wers dicecious, axillary, solitary, 
war dca in the Define ia of the leaves. Female flowers 
2-3 stigmas. jue flowers oblong, cr the anthers enloes 
ss a thin sac, 2-8-toothed, and bursting irregularly a 
Fruit } in. sone ovate- oo a purplish when fresh, pe to a 
reddish Lad 
The species is somewhat vareblé: | the marine forms having less | 
dentate oe nd longer eneine In Sir J. E. Smith’s Her- 
barium at the tae Society is a specimen eae “Tsle de 
Bourbon, H. L. fil.”; this I have little doubt is the same as one in 
the Kew Herbarium named ‘ N,. aap rina Commerson ; in Bor- 
bonia, Commerson,” and is probably 
N. intermedia Wolfga ang comes in habit F atou half-way between 
N. marina and N. minor All. (Caulinia fragilis W. ), but is referable 
to N. marina. illier’ cimens in Herb. Mus. Brit., named 
by himself, seem only local states of the plant.. N. minor, from its 
European distribution, may be found in Britain, as it occurs in 
Germany, Holland, Belgium, a France, but is wanting in the 
Scandinavian countries, except and. 
The plate gives the impression oe a plant somewhat more robust 
than usual; but our British plant is much stouter than any others 
I have seen; and herbarium specimens lose much of their bulk in 
drying. The one drawn was quite as stout as the figure when fres 
and floating in a white shallow dish—too great depth of water 
magnifies plants. 
EXPLANATION oF Prate 241—1, Specimen of whole plant from Hickling 
Broad, Norfolk. 2, Male flower, a 3, Male gen” natural size. 
4, Portion of leaf, magnified. 5, Female flower, magnified. 6, Female flower, 
natural size. 7, Young plant (copied from EL Danica, 2121). 
