344 THE ALPINE FLORA 



flowers in dense heads or capitules on a common recept- 

 acle enclosed in an involucre attached to its walls ; calyx 

 generally scaly and membranous; corolla gamopetalous, 

 inserted on the top of the calyx-tube, sometimes tubular, 

 more or less regular, with five lobes or teeth, sometimes 

 divided for the greater portion of the length into a flat 

 strap, notched at the tip. In many species, the Margue- 

 rite for exanple, the inflorescence takes the form of a 

 yellow disk of central florets, surrounded by a wreath of 

 others in the form of white tongues. 



Adenostyles 



These are stout growing plants with large triangular 

 leaves, generally white underneath, and big, flat, fluffy 

 heads (compound corymbs) of numerous, small, few- 

 flowered capitules ; the corollas are pinkish purple, 

 funnel-shaped, and five-toothed, with four stamens. 

 Both albifrons and alpina are fine plants of wilder parts 

 of the garden, and may be propagated from seed or by 

 division. 



A. albifrons (PI. L.) A robust plant with very broad, 

 somewhat heart-shaped leaves, irregulary toothed and 

 ashen coloured, with a fine tomentum on the underside; 

 stem at least 40 in., bearing a large corymb of flowers in 

 small clusters of 3-6-flowered capitules. June-September. 

 Jn the neighbourhood of Bourg-Saint-Pierre 1 have 

 found a variety with white flowers. Moist places in 

 mountainous and subalpine districts (1000-1800 m.). 



Ji. alpina is distinguished by its somewhat triangular 

 and more elongated leaves, which are glabrous on both 

 sides, and by a stem not exceeding 20 in. Flowers (July- 

 August) in cool rocks in the subalpine region of the Alps 

 and Jura. 



