
190 FLOWERING PLANTS 
very pale pink corolla; in both these the caps dehisces 
transversely. : 
Glaua is an neerse ye genus consisting of one species. It is 
a maritime plant, with opposite 
leaves; it is low and creeping, 
and only very slightly fleshy. It 
differs from all the rest of the 
Primulacez in having no corolla ; 
the calyx is, however, petaloid 
and pink; the stamens alternate 
with the lobes of the calyx. It 
isa slender plant, found on sands 
or in clefts of rocks where the sand has been blown, or in 
salt marshes. 
Trientalis and Centunculus (Chaffweed) must be mentioned, 
because the number of floral leaves is not 5, as in the rest of 
the Order, but 7 in Trientale and 4 in 
the Chaffweed. Brookweed (Samolus) 
has an epigynous, not hypogynous, 
flower, as it has an inferior ovary. 
On the whole, this Order 
belongs to the northern 
hemisphere. Some species are found 
on specially high mountains: thus, 
Bird’s-eye Primrose (Primula farinosa) 
is found in mountain pastures on all ee ‘ ate ae 
the great mountain ranges of Kurope TRANSVERSE DEHIS- 
and Asia, even in Greenland and the “°°” 
arctic regions. Cyclamen is alpine, whilst the Wood Lysimachia 
extends far north into Scandinavia; the Common Trientale, 
which is very local in the Scotch Highlands, is found in the 
woods of North Europe, Asia, and America. The species with 
which we are most familiar in England—viz., the Primrose, 
Cowslip, Pimpernel—belong respectively to woods, meadows, 
and cornfields; others, such as the Common Lysimachia, 
Bog Pimpernel, Water Violet, are semi-aquatic or hydrophytic 
in habit. | 

Fic. 104.—FRUIT OF CYCLAMEN, 
Distribution. 


