212 BRECK'S BOOK OF FLOWERS. 



trimmed occasionally, will give good satisfaction; flowering 

 from July till the frost kills it in autumn. 



THUNBERGIA. 



Thunbergia alata. Winged-petioled Thunbergia. Hand- 

 some climbing green-house perennial, but succeeds well as an 

 annual, from seed sown in the open ground the last of May, 

 growing five or six feet high, with numerous buff-colored flow- 

 ers, with dark throat, from July to October. 



Thunbergia alata, var. alba. White-flowered, winged- 

 petioled Thunbergia. This is a very showy variety of T. alata, 

 differing in no respect except color. The plant is highly orna- 

 mental, and, being easily multiplied by cuttings, it has already 

 become common. Like the other variety it is often treated as 

 a stove plant, but it succeeds better in the conservatory or green- 

 house, and, if planted in a warm, sunny border, it will grow and 

 blossom freely during the summer months. A soil composed 

 of peat and loam is that which suits it best. 



The genus was dedicated by the younger Linnaeus to his 

 friend and successor, Thunberg, an indefatigable botanical 

 traveller. 



Thunbergia alata, var. aurantica. Orange-flowered. This 

 is another beautiful variety, requiring the same treatment. 

 Plants forwarded in pots, in a frame, succeed better than those 

 sown in the open ground. There are other improved varieties, 

 all fine. The plants throw out many lateral branches, and will 

 require training to a trellis or frame-work. 



TROP^EOLUM. 



Nasturtium Indian Cress. 



TropcBolmn, from tropcsum, a trophy. The leaf resembles a 

 buckler, and the flower an empty helmet, of which trophies 

 were formed. 



