TREE P^EONY 



869 



TREVOA 



carefully dried in a shady place, and if kept perfectly 

 free from moisture will continue in good state until the 

 following May. 



TREE PJEONY. Pcro'nui Mou'tan. 

 TREE TOMATO. Cyphoma'ndra beta'cea. 

 TREFOIL. Trifo'lium. 

 TREFOIL, BIRDS-FOOT. Lo /us. 

 TREFOIL, GOLDEN. AnSmone Hepa'tica. 

 TREFOIL, MILE. Cy'tisus. 

 TREFOIL, MOON. Medica'go arbo'rca. 

 TREFOIL, SCENTED. Melilo'tos. 



TREFOIL, SHRUBBY. Jasmi'num fru'ticans, and 

 Pte'lea tnfolia'ta. 



TRELLIS, or TREILLAGE, is an arrangement of sup- 

 porters upon which to train plants. 



Espalier Trellis. The cheapest, the easiest, and the 

 soonest made is that formed with straight poles or stakes 

 of ash, oak, or chestnut, in lengths of from 5 to 6 or 

 7 feet, driving them in the ground in a range about a 

 foot distant, all of an equal height, and then railed 

 along the top with the same kind of poles or rods, to 

 preserve the whole form in a regular position. They 

 should be full ij inch thick, and, having pointed them 

 at one end, drive them with a mallet into the ground in 

 a straight range, close along the row of trees, a foot deep 

 at least. To render treillage still stronger, run two, 

 three, or more ranges of rods, along the back part of the 

 uprights, a foot or 18 inches asunder, fastening them to 

 the upright stakes either with pieces of strong wire 

 twisted two or three times round, or by nailing 

 them. 



Espalier trellis made of cast-iron rods is neater and 

 much more durable than that made of wood. 



Trellis for Climbers. These have been greatly im- 

 proved, or rather, they have been created within these 

 few years, for ten years ago we had nothing but stakes 

 and rods. 



Their forms are now various and elegant ; but we shall 

 here only explain the manner in which the wire trellis 

 for climbing plants is attached to the pots. It will be 

 seen that a strong wire ring is carried round the pot a 

 little above its bottom. To this a sufficient number of 

 upright wires are attached all round. These upright 

 wires are pressed down upon the surface of the pot till 

 they reach the rim, over which they are firmly bent till 

 they reach the highest point of the rim, or are even bent 

 a little within it. At this point they are secured by 

 a second ring of stout wire, adjusted round about them, 

 which having been done, the uprights are directed 

 upwards, and fashioned into the pattern required. By 

 these means a sort of collar is formed upon the rim of 

 the pot, which prevents the trellis from slipping down- 

 wards, while, at the same time, the lowest ring of wire 

 keeps it from swinging and swaying backwards and 

 forwards. 



Umbrella Trellis is a form excellently adapted for 

 Wista'ria ckirufnsis, and other climbers or shrubs having 

 long racemes of flowers. 



Hothouse Trellis, for training vines near the glass, is 

 usually made of thin rods of deal or of iron, placed about 

 a foot apart, and fastened to the framework of the 

 building. Mr. Long, Beaufort Place, Chelsea, has in- 

 vented a movable wire trellis, by which the vines may 

 be lowered from the roof, or placed at any angle, without 

 injuring the vines. This is an excellent mode of removing 

 them from the influence of extreme exterior heat or 

 cold. A still further improvement would be to have 

 the vertical rods movable round the rod horizontally 

 fixed to the rafter or roof, for then the whole trellis 

 might be raised to an angle with, or even close to, the 

 glass, whenever sun to the vine upon the trellis, or shade 

 to the plants within the house, was desirable. 



TRE MA. (From tremo, to tremble ; in allusion to 

 the movement of the leaves when the air is in motion. 

 Nat. ord. Urticaceae. Allied to Celtis.) 



Greenhouse or stove trees. Seeds ; cuttings in sand, in 

 a close case, with bottom-heat Loam, peat, and 

 sand. 



T. Li' ma. (Lima). 20. Green, yellow. W. Ind. 1823. 

 micro,' ntha. (small-flowered). 10. Green. Trop. 



Amer. 1739. Half-hardy. 

 orienta'lis (oriental). 50. Yellow-green. Tropics of 



Old World. 1820. 



TREMA'NDRA. (From tremo, to tremble, and aner, 

 andros, a stamen ; the anthers sway with the least current 

 of air. Nat. ord. Tremandraceae.) 



Dwarf Australian shrubs requiring greenhouse treat- 

 ment. Cuttings in sand under a bell-glass. Peat chiefly, 

 with a little loam and sand. 

 T. hirsu'ta (hairy). See TETRATHECA HIRSOTA. 



Huege'lii (Huegel's). See TETRATHECA HIRSUTA. 



stellt'gera (star-bearing), ij. Purple. 



verticilla'ta (whorled). See PLATYTHECA GALIOIDES. 



TREMBLING AMERICAN TREE. Po'pulus tremuloi' dts. 



TRENCHING is one of the readiest modes in the gar- 

 dener's power for renovating his soil. The process is 

 thus conducted. From the end of the piece of ground 

 where it is intended to begin take out a trench two 

 spades deep, and 20 inches wide, and wheel the earth to 

 the opposite end to fill up and finish the last ridge. 

 Measure off the width of another trench, then stretch 

 the line, and mark it out with the spade. Proceed in 

 this way until the whole of the ridges are outlined, after 

 which begin at one end, and fill up the bottom of the 

 first trench with the surface or " top spit " of the second 

 one ; then take the bottom " spit " of the latter, and 

 throw it in such a way over the other as to form an 

 elevated sharp-pointed ridge. By this means a portion 

 of fresh soil is annually brought on the surface in the 

 place of that which the crop of the past season may 

 have, in some measure, exhausted. 



Bastard Trenching is thus performed. Open a trench 

 2\ feet or a yard wide, one full spit, and the shovelling 

 deep, and wheel the soil from it to where it is intended 

 to finish the piece ; then put in the dung, and dig it in 

 with the bottom spit in the trench ; then fill up this 

 trench with the top spit, &c., of the second, treating it 

 in like manner, and so on. The advantages of this plan 

 of working the soil are, the good soil is retained at the 

 top, an important consideration where the subsoil is 

 poor or bad ; the bottom soil is enriched and loosened 

 for the penetration and nourishment of the roots, and, 

 allowing them to descend deeper, they are not so liable 

 to suffer from drought in summer ; strong soil is rendered 

 capable of absorbing more moisture, and yet remains 

 drier at the surface by the water passing down more 

 rapidly to the subsoil, and it insures a thorough shifting 

 of the soil. 



In all trenching, whether one, two, or more spades 

 deep, always, previous to digging, put the top of each 

 trench 2 or 3 inches deep or more, with all weeds and 

 other litter at the bottom of the open one, which not 

 only makes clean digging and increases the depth of 

 loose soil, but all weeds and their seeds are regularly 

 buried at such a depth, that the weeds themselves will 

 rot, and their seeds cannot vegetate. 



TREVE'SIA. (Commemorative of the family Tretes 

 de Bonfigli, patrons of botanical research. Nat. ord. 

 Araliaceae.) 



Stove shrubs with large, fingered, ornamental leaves. 

 Cuttings in sand, in a close frame, with bottom-heat. 

 Loam, leaf-mould, and sand. 

 T. e'minens (eminent). Leaves with 9-11 segments. 



Philippines. 1882. 

 palma'ta (hand-shaped). 10-15. Whitish. March. 



India ; Burma. 1818. 

 sunda'ica (Sundaic). 10. Greenish-white. Java. 



TREVIRA'NA. (Commemorative of Ludolph C. 

 Treviranus, professor of botany at Rostock and Breslau, 

 in Germany. Nat. ord. Gesneraceae. Now referred to 

 Achimenes.) 



T. ca'ndida (white). See DICYRTA CANDIDA. 

 cocci'nea (scarlet). See ACHIMENES COCCINEA. 

 longiflo'ra (long-flowered). See ACHIMENES LONGI- 



FLORA. 

 pukkt'lla (pretty). See ACHIMENES COCCINEA. 



TREVO'A. (Commemorative of Don Two, a Spanish 

 botanist. Nat. ord. Rhamnaceae.) 



