2i8 PLANT CULTURE 



TANACETUM. There is little in the subject T. vtdgare (Tansy) 

 to recommend it, beyond its habit of keeping green and fresh-looking 

 during the Summer. It is a favorite cottage garden plant. The 

 flowers and foliage are very fragrant. The variety T. v. crispum 

 with curled leaves is rather ornamental. It will thrive in almost all 

 soils and situations that are not too wet. 



Propagation. Increased by division or by seeds. 



THYMUS (Thyme). T. Chamadrys, I. lanuginosus and T. 

 Serpyllum are well suited for growing in dry and exposed parts of 

 the rockery. They are low-growing and wide-spreading plants, 

 with small leaves and flowers. T. s. vulgaris is the Lemon Thyme, 

 a highly fragrant and ornamental plant, growing from 8 inches to 

 I foot high. They are adapted to a variety of uses on account of 

 their ability to persist in dry places. Some of them are especially 

 adapted to rockwork. 



Propagation. Easily propagated by means of division. T. 

 vulgaris is often renewed by seedlings. Also well colored pieces of 

 the plant are rooted in the Fall. 



TIARELLA (False Mitrewort). T. cordifolia (Foam Flower) ' 

 is a native species for shady spots in the front part of the herba- 

 ceous border, or on the rockery. It is a lover of cool, shaded places 

 and of rich, moist soils. It is usually easy to manage. They are 

 particularly attractive in the Autumn on account of their brilliant 

 leaf-coloring. 



Propagation. B)- means of runners thrown out after flower- 

 ing, or by division. 



TRADESCANTIA (Spiderwort). T. virginiana is found with 

 blue and also pure white flowers. It is an extremely variable plant. 

 This species and its varieties are useful for herbaceous borders. 

 They do well in damp soil. Although commonly wild in many of 

 our states, they are highly prized in Europe for planting in herba- 

 ceous collections. 



Propagation. By division, seeds or cuttings. 



VERBASCUM (Mullein). V. olympicum is one of the hand- 

 somest of a large number of species. It grows from 4 to 6 feet high. 

 Although a perennial, it is best treated as a biennial. It is a good 

 plant for the back part of a sunny border. They are of easy culti- 

 vation being adapted to any soil except a cold, wet one. 



Propagation. By division or cuttings. Seeds are also used, 

 but they seldom come true, as the Verbascum hybridizes very freely. 



