Herbaceous plants. 321 



with large, blue flower-heads. It is a handsome species for 

 rocky banks. 



Tansy, Tanacetum vulgare. A coarse but rather orna- 

 mental plant, effective in masses on grassy banks or road- 

 sides. Stem simple, three or four feet high, with pinnate, 

 deeply cut leaves of a feathery appearance. Flower-heads 

 button-like, golden-yellow in large corymbs, numerous in 

 summer and very lasting. Prefers sunny positions and a 

 light, loamy soil. 



Abrotanum, Artemisia Abrotanum. A somewhat 

 shrubby plant three or four feet high, with pinnately divided 

 leaves of a grayish color, very strongly scented and culti- 

 vated for this reason. Flowers inconspicuous. Borders or 

 shrubberies in rich soil. 



Golden Immortelle, Heleclirysum arenarium. Common 

 on sandy shores in Northern Europe. Stem five or six inches 

 high, with lanceolate, whitish, downy leaves, and corymbs 

 of small golden yellow flower-heads. Forms tufted masses, 

 very effective when in flower. Excellent for seaside garden- 

 ing or for naturalizing in barren and sandy lawns. May also 

 be grown in rockeries with good effect. H. bracteatum is a 

 familiar annual border plant ; grows about a foot high and 

 has large globular heads of yellow, deep crimson, rose-colored 

 or white flowers. Propagated by seeds in spring. 



Button-Snakeroot or Blazing Star, Liatris. Rough but 

 rather showy plants with erect stems and almost grass-like 

 leaves. Flowers in spiked heads. The best are : L. squarosa, 

 heads bright purple, height two feet ; pychnostachia, pale 

 purple, fine for dry soil ; spicata, purple, a foot high ; for 

 margins of streams and lakes or in borders. 



