PYRAMIDAL TREE, WINGED. 409 



PYRETHRUM. 



of great beauty. A similar mode of treat- 

 ment must be followed for small pyramidal 

 or bush fruit, as they are sometimes called, 



genus, and contains the greatest number of 

 varieties. The term is usually applied to 

 plants of the "Bachelor Button" kind. 



pa* 



FIG. 6. PYRAMID IN SIXTH YEAR. 



grown in pots and borders in orchard 

 houses. This disposes of the modes of 

 training trees without artificial support. 



Pyre'thrum (not. ord. Compos'itse). 



A genus of hardy herbaceous perennials, 

 now included under "Chrysanthemum," 

 which is the most beautiful species of the 



PYRETHRUM ROSEUM. 



The most noteworthy one, Pyrethnim 

 \ rosetim, having rose-coloured flowers, or 

 'rather petals of this colour arranged round 

 j a yellow disc, and P. uliginosum, or the 

 j" Great Ox-eye Daisy." The flowers, 

 white, yellow, and blue, popularly known 

 as Marguerites are allied to the pyre- 

 thrums. Propagated by division of the 

 roots, cuttings, and seeds. 



Pyrus, Trees of Genus. 



Among deciduous trees, the genus Pyrus 

 includes apples, crabs, pears, thorns, the 

 service tree, and the mountain ash some 

 of the most ornamental of our smaller trees, 

 whether we consider flowers, fruit, or 

 foliage. There are Pyrus aria, the white 

 beam tree ; P. prunifolia, the Siberian 

 crab ; P. spcctabilis, the Chinese crab ; 

 j and many variegated and weeping varieties, 

 which, as standards upon lawns, form very 

 pretty objects. Any one who intends to 

 plant cannot do better than select such of 

 these as may suit his garden site, and 

 assist the landscape which he is preparing. 



