VON marten’s farben deb pflanzen. 
233 
In regard to the littoral Flora, which Hr. Marten believes to pre¬ 
sent a greater contrast than any other in Europe with the Floras of 
the Alps and Arctic Circle, comparisons rest on the species growing 
on the shores of Denmark, Germany, and Italy. This peculiar 
Flora includes 217 Phanerogams, 87 of which are apetalous or gluma- 
ceous, and 25 are white-flowered, leaving a balance of 105 with 
coloured perianths. Of these, 4 species are two-coloured, 21 are 
pure yellow, 17 yellow and red, 3 yellow and blue, with 1 pure 
red and 1 pure blue, against 59 intermediate between red and blue. 
Compared with Greenland, it is shown that, in the littoral Flora, the 
proportion of species, destitute of coloured perianth, is about the 
same: the chenopods of the sands balancing the sedges of the snow. 
That the white flowers are only about half as numerous, the yellow 
fewer, the red rather more, and the blue nearly twice as numerous. 
In the species of the Wiirttemberg Flora, the largest proportion with 
white flowers expand in spring, and suggest the notion that the lower 
the temperature, the more numerous they become. Fed flowers pre¬ 
dominate in autumn and summer; yellow constitute an equal pro¬ 
portion in spring, summer, and autumn; while blue, like white, 
decreases from the first. 
Of the species with agreeably scented flowers growing about 
Wurttemburg, the largest proportion are white-flowered, the second 
red. Pollen is almost always yellow, or some colour in which it forms 
part. The few observed exceptions are recorded. Finally, the 
principal groups of Cryptogams are severally noticed in respect to 
their colour-relations. 
