tra'pa. 



291 



TREE MALLOW. 



plants, with pink flowers, natives of 

 Europe and America, which should 

 be grown in very sandy loam, or 

 heath-mould. 



Training is an important operation, 

 whether it be applied to nailing trees 

 against a wall, or to training herba- 

 ceous plants over an iron or wooden 

 frame-work. Climbing Roses may 

 be trained as pyramids by fixing a 

 pole with three legs, or three poles, 

 in the ground, and suspending hoops 

 from them, as shown in Fig. 36, and 



Fig. 36. 



MODES OF TRAINING ROSES, &C. TO FORM 

 PYRAMIDS. 



this mode of training may be applied 

 to various other plants. Plants in 

 pots may be trained by fixing a num- 

 ber of sticks or pins of iron, with 

 hooks attached (a) in the earth in 

 the pot, and resting hoops on them, 

 as shown in Fig. 37. 



Tra'pa. — Hydrocharidece. — Wa- 

 ter Caltrops. Aquatic plants, natives 

 of Europe and the East Indies, with 

 white flowers, and very curious nuts, 

 which, when cooked, resemble in taste 

 those of the chestnut, and are equally 

 wholesome. The rhizoma should be 

 planted, or the seeds sown, in loamy 



soil at the bottom of the water in 

 which the plant is to grow. 



Fig. 37. 



MODS OF TRAINING PLANTS IN POTS. 



Traveller's Joy. — See Clematis. 



Tree Carnation. — Didnthus ar- 

 boreus is in its wild state probably 

 only the common Carnation which 

 has been trained against a wall, and, 

 by being kept continually growing, 

 has been forced to take the character 

 of a tree. It should be planted in 

 calcareous loam, against an east or 

 west wall, and carefully trained, giving 

 it a little protection in case of severe 

 frosts. 



Tree Mallow. — Lavatera. — Be- 

 sides the common annual species of 

 Lavatera, there are nine or ten species 

 which are shrubby, and one of which, 

 L. phoenicea, a native of the Canary 

 Isles, is a tree 10 feet high. L. 

 maritima is the commonest kind ; 

 and as this is a native of Spain and 

 the South of France, it will thrive in 

 u 2 



