220 ROCK GARDENS 



high. Silvery foliage. Pure white flowers during June and July. 

 Hardy and easily propagated by root division and seed. A good 

 rock plant. 



A. nana, A. moschata, A. umbellata, etc. — Have silvery foliage 

 and white flowers, and are all of dwarf habit, easily cultivated and 

 increased. They mostly bloom during the summer months, and 

 are useful for carpeting, but call for no special attention. 



Acis (Amaryllidaceae), syn. Leucojum 



A small genus of bulbous plants, all hardy, and related to the 

 " Snowflake." 



A. autumnale. — Sheltered position. Fine, very sandy soil. 

 Grows about 3 inches high. Narrow green leaves, which disappear 

 during the summer. Flowers, which appear in September before 

 the leaves, resemble delicate pink snowdrops. This is a very 

 uncommon plant, and is a gem for the rock garden, and looks its 

 best springing from a mat of delicate-rooted Sedum, such as 

 dasyphyllum. 



The following are all worthy of a choice spot, and should be 

 cultivated in sandy soil : — 



A. grandiflora. — Grows 6 inches high, with large, white, bell- 

 shaped flowers in August. 



A. roseus, — Grows 3 inches high, with bright rose-coloured 

 flowers in August. 



A. trichophyllum. — Grows 6 inches high. Rather hairy leaves. 

 White flowers in January. 



AcTAEA (Ranunculaceae), Bancberry 



Hardy perennials, chiefly suitable for the wilder garden. In- 

 creased by seed and division. 



A. alba. — Partial shade and deep sandy soil. Grows about 18 

 inches high. Long, white, feathery flower-spikes, rather like a 

 Spiraea, followed by white berries. Flowers in June. 



A. spicata. — Similar, with black poisonous berries. 



A. spicata.^ var. rubra. — Same as above, only with scarlet berries. 



ACTINELLA (CoMPOSITAE) 



A small genus of hardy plants. Increased by division of root in 

 spring. 



A. grandiflora. — Deep sandy soil, in a sunny position. Dwarf, 

 tufted habit, about 9 inches high. Yellow flowers about 3 inches 

 across, borne on many-branched stems, in August. 



