224 ROCK GARDENS 



^. sagittatum. — Stiff, many nerved, oblong leaves ; rather large 

 white flowers. 



^. thesiifolium. — Grows about i8 inches high, with slender 

 twiggy stems and long narrow leaves. Large pink flowers marked 

 with purple. 



^. tenue^ heterophyllum^ and ccsspitosum.—Pixe. all densely tufted, 

 dwarf-growing species, with pink or white flowers. 



yfi". thomasianiim.—Y)v^2iX{-%xQyN\n% ; glaucous leaves, and rosy- 

 pink flowers. 



jE. trinervium. — Dwarf-growing ; leaves hard and three-nerved ; 

 large white flowers. 



^. saxatile. — Twiggy branches with rosy-purple flowers, and 

 freely produced. 



AjUGA (Labiatae) 



A dwarf, free-growing genus of plants of procumbent habit. 

 Though not of first value for the rock garden, they are useful for 

 carpeting. Are all of the easiest culture in ordinary soil, and are 

 indifferent to position. 



A. genevensis (syn. A. alpina and A. Rugose). — Creeping habit ; 

 bright, shiny green leaves. Flowers vary in colour from blue to 

 rose and white, in spikes about 4 to 5 inches long. This plant 

 should not be associated with the choicer alpines, which it would 

 quickly overrun. There is a variety of this plant known as A. 

 genevensis Brockbankii which is of dwarfer habit. 



A. genevensis crispa (syn. A. metallica crispa). — The leaves of 

 this variety are curly and have a metallic sheen. Spikes of deep 

 blue flowers. 



A. reptans. — A native plant useful for carpeting in the wilder 

 parts on account of its vigorous growth and dark green purplish 

 leaves and blue flowers. There are three varieties : — 



A. reptans alba. — A white form. 



A. reptans atropurpurea. — Dark bronze-purple leaves. 



A. reptans variegata.—V2ineg2ited silvery leaves. 



Alchemilla (Rosaceae), Ladies' Mantle 



A genus of but little value except for their foliage. Light sandy 

 soil and open situation suits them all. Easily increased by division 

 of roots, and seed. 



A. alpina. — Has evergreen silvery leaves, and grows about 6 

 inches high. Small greenish flowers in July. Other varieties are : 



A. maxima. — Large leaves, downy underneath ; 12 inches high. 



A. pentaphylla. — Grows 6 inches high ; silvery-white leaves. 



