270 GLENNY S HANDBOOK 



^pikes of (IroopiiifT scarlet tubes freely in the autumnal 

 months. They should have a border under shelter of a wall, 

 and the soil should be sandy. They throw out suckers from 

 their roots, by which they may be increased. They are some- 

 times called Kniplwfia. The following are the best : — 

 T. Burchellii, T. pumila, T. Roojjeri. T. uvaria is a fine 

 plant. All bear orange flowers. 



TRITON I A. [Iridaceae.] Showy bulbous plants, closely 

 allied to Ixia, and requiring very similar management. T. 

 aurea, with orange-coloured flowers, treated like the better 

 kinds of Gladiolus, makes a splendid bed in the flower garden. 

 They are mostly very well adapted for pot culture. 



TROLLIUS. Globe Flower. [Ranunculacese.] Showy 

 herbaceous perennials, quite hardy, growing in ordinary 

 garden soil, and increased easily by parting the roots during 

 the dormant season. 



TROMOTRICHE. See Stapelia. 



TROP.EOLUM. Indian Cress. [Tropfeolaces.] Soft- 

 stemmed climbing herbs, mostly ornamental, sometimes splen- 

 did, part of which are annual, and others perennial, having 

 tuberous roots. T. majns, the common Nasturtium, as it is 

 called erroneously in gardens, and its varieties, may be sown 

 in the open ground in March, where it is to bloom and bear 

 through the summer, and requires neither care nor attention. 

 These are beautiful plants everywhere, in rich ground 

 covering the surface with foliage and flowers, or climbing up 

 stakes and hiding unsightly fences or other objects, or potted 

 and placed on the window-sill, where the burning heat and 

 limited food arrest their vegetation, but add profusion to the 

 blossoms and intensity to their colours. T. minus is smaller, 

 but equally effective in its way. The double orange-coloured 

 variety of T. majns is a greenhouse plant, as is also the double 

 scarlet Nasturtium, which is the double-flowered variety of 

 T. minus. They are increased by cuttings, and preserved, 

 like other half-hardy things, in the greenhouse during winter 

 for planting out in summer, where, in hot dry situations, 

 they are really splendid. T. tricolor and its varieties, T. pen- 

 taphyllum, T. brachyceras, and 2\ azurevm, are favourites 

 among the tuberous climbing species, and can only be grown 

 successfully upon proper trellises, or with adequate support. 



