(Milk Vetch. Nat. Ord. Leguminosae).A genus of mostly robust plants of little garden value. Three or four species are useful in the rock garden. They thrive in deep sandy loam and are propagated by division in autumn, or seeds in spring. Rock Garden Species. We recommend the following : Astragalus alpinus.This has short trailing shoots, forming a mat of foliage. Flowers purple. Site open. Soil loam. Flowering Period, July to August. Height, 3 ins. A. danicus.Similar in habit to above. Flowers blue and white. Site open. Soil gritty. Flowering Period, June to July. Height, 3 ins. The variety albus has white flowers. A.massiliensis (Gum Tragacanth). A spiny bush, with silvery pinnate leaves. Flowers white. Site sunny. Soil rocky. Flowering shrub blooming June to July. Height, 1-2 ft. A. monspessulanus.Leaves pinnate and in tufts. Flowers large, reddish-purple. Site open. Soil deep gritty loam. Flowering Period, June to July. Height, 6 ins. See also Shrubs.
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