Upon the highest summits are found Saponaria Pumilio (resembling our Silene acaulis) and varieties of Galium, Euphorbia, Astragalus, Veronica, Jurinea, Festuca, Scrophularia, Geranium, Asphodeline, Allium, Asperula; and, on the margins of the snow fields, a Taraxacum and Ranunculus demissus.
In favourable situations and seasons some of the very hardiest, as Silene pendula, Saponaria, Nemophila, Gilia, &c., may be sown in September or October, and transplanted to the beds or borders for very early spring flowering.
Saponaria calabrica: hardy, 6 to 8 in., bright rose pink or white; continuous blooming, compact-growing.
The quillay (Quillaja saponaria) is another characteristic evergreen tree of this region, whose bark possesses saponaceous properties.
- Saponin and many allied bodies form an abundant soapy-looking froth when shaken up with water, and they are contained in a very large number of plants, the chief of which are the Quillaia saponaria, Polygala senega, sarsaparilla, and others, known collectively as soapworts.