82 Alpine Plants. 
Nierembergia frutescens (Hab. ?). 
Plant in a well-drained position, on the flat, facing 
full south, in sandy loam. Prune back in April. 
Nierembergia rivularis (La Plata). 
Although this is a plant that loves the water-side 
in its native place, it does not do well in this country 
in damp places. It succeeds best in a full south 
position, in good strong loam. Once a year top-dress 
with a little peat and leaf-mould, as it is a surface- 
rooting plant and requires a little addition of compost 
to assist the young growth. 
Nocewa (sy1!. Hutchinsia) alpina (Mts. of C. and S.E. Furope). 
Plant on a dry, sunny bank facing full south, 
where it can grow over a rock immediately in front, 
in a compost of poor loam and grit in equal parts. 
Nocceea (syn. Iberis) stylosa (S, Europe). 
This tiny plant does well on a sunny part of the 
rockery, wedged very tightly between pieces of lime- 
stone, together with a little loam and leaf-mould. 
QOEnothera acaulis (Chili). 
This plant does well on the lower beds of the 
rockery, in a sunny, well-drained place on the flat, in 
deep, poor loam. 
OEnothera cexspitosa, syn. eximia marginata (N.W. America). 
This plant loves a well-drained place over a 
warm bottom, either on limestone or deep sandy loam. 
As this plant runs freely in the ground, and the 
young growth will sometimes make its appearance 
quite 1ft. away from the original place, the young 
