166 FLOWERS OF THE ROADSIDES AND HEDGES 
dwarf, trailing, or prostrate, rising at the tip, with numerous brownish 
thick stems, which bear many inversely egg-shaped leaflets, in threes, 
coarsely-toothed, and softly downy on the sides. From the Wild 
Strawberry this plant differs in having no erect flower-stalks, and it 
has generally smaller flowers, with distant (not overlapping) petals, 
which are not notched as in the latter. 
The calyx is as long as the corolla, and the achenes are hairy on 
the scar, and wrinkled transversely. The receptacle is not, as in the 
Wild Strawberry, fleshy. 
The Barren Strawberry is not more than 6 in. in height. It is in 
flower in March up to May. It is perennial, and reproduced by achenes, 
which are numerous. 
It is an early-flowering plant, with many flowers, which are white 
but inconspicuous. It is consequently not much visited by insects, 
and is probably in the majority of cases self-pollinated. The honey 
is secreted as a thin layer, and not in drops as in /vagaria, with which 
otherwise it largely agrees. The anthers and stigma are ripe at the 
same time. 
The fruit consists of a group of achenes, which are dispersed when 
dry by falling away from the disk, and partly by the wind. 
Barren Strawberry is a sand-loving plant, and addicted to a sand 
soil, flourishing also on barren stony ground, derived from granite 
or older harder siliceous rock soils. 
Two fungi are liable to be found on the Barren Strawberry, Sepéorza 
Jragarie and Phragmidium fragariastrt. 
A beetle, Galeruca tenella, frequents it, and a moth, WVefticula 
arcuata. 
Potentilia, Brunfels, is from the Latin Aofexs, powerful, in allusion 
to its powerful astringent nature, and the second Latin name refers 
to its barren nature. 
This plant is called Barren Strawberry, Strawberry Plant. It was 
assigned to St. Hilary. 
ESSENTIAL SPECIFIC CHARACTERS :— 
98. Potentzlla steris, Garcke.—Stem prostrate, leaves obovate, 
ternate, serrate, silky, flowers white, petals as long as sepals, notched, 
short. 
Dog Rose (Rosa canina, L.) 
The forms found in early deposits do not approach 7. canzna, but a 
species with nearly round fruits. The present distribution is Europe, 
N. Africa, Siberia, or part of the North Temperate Zone. The 
