GARDEN FLOWERS. 359 



TOLPIS. Hawkweed. [Compositae.] A fine yellow-flow- 

 ered annual, formerly called Crepis barbata. Sow in May in 

 common soil. The flowers close in cloudy weather. 



T. barbata (bearded) ; hardy annual ; 2 feet ; flowers yellow 

 and purple, in July ; 1620. The other species are T. altissima, 

 coronopifolia, grandiflora, umbellata, and -virgata. 



TORREYA. [Taxaceae.] Hardy evergreen trees. Deep 

 loamy soil. Propagated by cuttings or seeds. 



T. myristica (Californian nutmeg) ; hardy evergreen tree ; 30 

 feet; California; 1851. T. taxifolia (yew-leaved) ; hardy ever- 

 green shrub ; 20 feet ; Florida ; 1 840. 



TOUCH-ME-NOT. See IMPATIENS. 



TOURNEFORTIA. [Boragineas.] T. heliotropoides is a heli- 

 otrope-like hardy or nearly hardy plant, not very showy, but 

 a very free bloomer, and useful for small beds. It will grow 

 in the open borders : a plant or two should be kept in a 

 frame through the winter. It is increased either by seeds 

 sown in May, or by cuttings ; and is a low plant, flowering 

 from May to August. 



T. heliotropoides (heliotrope-like) ; half-hardy perennial ; I 

 foot ; flowers lilac, in June ; Buenos Ayres ; 1829. 



TRACHELIUM. Throatwort. [Campanulaceas.] Half-hardy 

 herbaceous perennials. Light loamy soil. Increased by 

 seeds sown in spring in a gentle heat, and carefully grown 

 while young. 



T. coeruleum (blue) ; half-hardy perennial ; 2 feet ; flowers 

 purple or white, in August ; Italy ; 1640. 



TRADESCANTIA. Spiderwort. [Commelinaceae.] The 

 hardy perennial species of this genus are adapted for the 

 common borders. They are readily increased by division, 

 and only require to be planted in the common soil, and left 

 undisturbed till they get too large, when they must be taken 



