TRA 
TUL 
wall, where its pretty blue flowers are 
very effective. 
TRACHYMENE (Rudge.) Nat. Orel 
Umbelliferce. The annual species, T. 
ccerulea, should be sown in March, and 
subsequently treated in the manner of 
half-hardy plants of the class. the 
perennial kinds are properly greenhouse 
plants, but may be used for bedding 
purposes in summer. 
TRICHONEMA (Ker.) Nat. Ord.^ 
Iridacece. Pretty bulbous-rooted plants, 
with flowers of various colours, red, pur¬ 
ple, pink, or yellow ; they require to be 
treated in the manner recommended for 
Ixias 
TRICHOPILIA (Lindley.) Nat. 
Order Orchidacere. The only species, 1 
tortilis, is a beautiful epiphytal orchid, 
which should, however, be grown in pots 
of the ordinary mixture of fibrous peat 
and sphagnum. While the pseudo¬ 
bulbs are forming the plant should have 
a moderate supply of water every day ; 
they are usually completed by October, 
after which the soil should be kept quite 
dry till the flower buds are seen pro¬ 
ceeding from the base of the. bulbs, 
when it should again be administered. 
It is a native of Mexico, and therefore 
does not require a very high tempera¬ 
ture at any time; 60° to 70° is sufficient 
to grow it, while in the resting season 
50° is quite enough. ’ 
TRIPTILION (Ruiz and Pavon.) 
Nat. Ord. Composite. The two species 
of this genus are remarkably beautiful 
annuals, particularly spinosum, which has 
lovely blue flowers. The seed should be 
sown in heat in early spring, and some 
care is necessary to keep the plants 
gently growing without having them 
drawn; in summer they may stand in 
pots in the greenhouse, or be transferred 
to the borders of the flower garden. 
TRITOMA (Ker.) Natural Order 
IAliacea. Handsome half-hardy bulbs, 
succeeding in light rich soil; they shoulc. 
be potted and grown in a frame, as the 
flowers are usually produced late in the 
season, when it becomes necessary to 
guard against occasional frost. 
' TRITONIA (Ker.) Natural Order 
Iridacece. Another pretty genus of 
bulbous-rooted dwarf-growing plants, 
which may be treated in the manner of 
Ixias or Sparaxis. 
TROPiEOLUM (Linn.) Nat. Ord. 
Tropaolacea. The annual species of 
this genus are better known by their 
popularname ofNasturtium. Theymerely 
require to be sown in the open border in 
March or April, and are valued mostly 
or their seeds as a pickle; aduncum is, 
lowever, very ornamental trained to a 
hilar or wall, where its numerous bright 
yellow blossoms are very showy. T. 
pentaphyttum, tuberosum , and Moritzi- 
anum , are tuberous-rooted perennials 
which succeed against a south wall, 
merely taking the precaution to remove 
the roots and keep them dry through the 
winter. The most beautiful of the en¬ 
tire family, and, consequently, most 
generally esteemed, are tricolorum, Jar- 
rattii , brachjceras, and azuremn : these 
are dwarf climbers of slender habit, and 
suitable for pot culture. The tubers 
should be potted in autumn or spring 
into large pots filled with sandy loam, 
leaf-mould, and peat, and the branches 
trained over a trellis attached to the 
pot; in May, or earlier, the flowers are 
expanded, and, soon after, the roots 
should sink into a state of rest, when it 
is necessary to keep them dry till they 
exhibit signs of growing. The new spe¬ 
cies, edulis, Lobbiamm, and crenaUfiorum , 
are of stronger habit and best adapted 
for covering the walls or pillars ol the 
greenhouse, though it is more than pro¬ 
bable that if brought forward in spring 
and afterwards planted in a dry border 
against a south wall, they will be found 
to blossom better than in any other 
situation. None of the species, especi¬ 
ally the dwarf climbers, should ever be 
subject to much heat, a shelf in the 
greenhouse being at all times fully suffi¬ 
cient for them. 
TULIP A (Tourneeort.) Nat. Ord. 
Liliacete. There are upwards of two 
dozen true species of the Tulip, from 
one of which, \hzT.Gesneriana, is derived 
the numberless varieties cultivated and 
esteemed so highly by the .florist. In a 
natural state this species is. a most un¬ 
likely looking subject, for it is a dull 
