Derbaceous plants. 3 21 



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 oil 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 

 liszht, 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. II. 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, I/iatiris. — 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. 



