12 Addisonia 



both new generic names resulting from the spHtting up of the large 

 genus Euphorbia. 



Soon after its discovery tliis plant was introduced to cultivation in 

 England. Our illustration was made from a specimen from the flower 

 borders of the New York Botanical Garden. The snow-on-the- 

 mountain is a common garden annual, grown for its showy white- 

 margined upper leaves. The flowers are inconspicuous, but interesting 

 in structure. A related annual flower of our gardens is Poinseitia 

 heicrophylla, with red color on the upper leaves. This is sometimes 

 called in contrast " fire-on-the-mountain." 



It is a hardy annual, the self-sown seeds germinating the following 

 spring. It may also be propagated readily by seeds, sown in the 

 spring under glass or in the open ground. 



Kenneth R. Boynton. 



Explanation OF Plate. Fig. I. — Flowering stem. Fig. 2. — Involucre, X 4. 

 Fig. 3.— Fruit, X 3. Fig. 4.— Seed, X 3. 



