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—— - —- 
TROPZOLUM. 397 TROPOLUM. 
as only the common clover of the | themselves in autumn. There were 
meadows, will probably be surprised formerly only two kinds of the an- 
to find that there are nearly a hun- | nual Tropeclums, 7. mejor and 7. 
dred and fifty species, all more or! minor; but since 1830, several va- 
less ornamental. Some of these | rieties have been raised. One with 
are perennials and some annuals; | very dark flowers, is called 7. m. 
and the colour of their flowers va- | atrosanguineum, and another with 
ries from dark crimson, and some-/| dark stripes is 7. m. vemistum. 
times scarlet, to purple on the one 
hand, and to white, cream-colour, 
and pale yellow on the other. 
Tri LLium.— Melanthacee.—Tu- 
berous-rooted plants, generally with 
dark brown or reddish fiowers, 
which have a remarkably rich and 
velvet-like appearance. 
natives of North America, and 
they should all. be grown in shady 
places, in sandy peat kept moist. 
Thus treated they will flower freely, 
and their flowers will have a very 
rich and singular effect. 
Trieri LLon.—Composite.—Chi- 
lian annuals, which are hardy in 
Brita, and worth growing for their 
curious feathery seeds. 
Trista nia. — Myrtdcee. — Aus- 
tralian shrubs, nearly allied to. Me- 
laleuca ; which require a greenhouse 
in England. They should be grown 
in sandy peat, and they are propa- 
gated by cuttings. 
Triro\nia. — Lridee. — Bulbous 
plants with splendid flowers, which 
will thrive in the open ground for 
“many years without taking up, if 
grown in dry sandy soil, or pro- 
- tected from rain during winter. See 
I’xta. 
Tro’Luivs. — Ranunculécee. — 
The Globe flower is a British plant 
frequently grown in gardens, but on 
which cultivation appears to have 
had no effect. There are some 
exotic species. 
Trop oLum. — Tropeoldcee. — 
The Garden Nasturtium. The well- 
known annual plants called the 
Nasturtium are common in every 
garden, and only require sowing 
with the other hardy annuals in 
spring; they may be suffered to sow 
ear a i 
z 
~» 
They are | 
The young shoots of these plants 
are succulent, and taste like the 
common land eress, the botanical 
iname of which is Nasturtium, and 
_ hence they have received:their popu- 
‘lar name. Besides the hardy annual 
kinds, there are several half-hardy 
species, most of which are kept in 
the greenhouse. The best known 
|of these is Trape‘olum tricolérum, 
with red, black, and yellow flowers, 
which has tuberous roots, and such 
very weak and slender stems, that 
it is found necessary always to train 
them over a wire frame, as they are 
quite unable to support themselves. 
In Paxton’s Magazine of Botany, 
it is stated that the tuber of the 
root should not be buried, but only 
plaeed on the surface of the soil, so 
that the fibrous roots may penetrate 
hate ris, he says, will enlarge the 
bulb or tuber in “a truly astonish- 
ing manner,” and though the plants 
will not appear healthy the first 
season, they will afterwards become 
extremely vigorous. He also re- 
commends using double pots for 
these plants, and filling up the intor- 
stices with river sand, which should 
always be kept moist. 7. brachy- 
céras may be treated in the same 
manner; and it would probably 
succeed with 7. tuberosum, a spe- 
cies which it is very difficult to 
throw into flower under ordinary 
treatment; but which grows best 
in the open ground, im rich soil, 
and with plenty of air and light. 
T. peregrinum, the Canary Bird 
flower, was formerly considered a 
greenhouse plant, but it is now 
found much better to treat it asa 
half-nardy annual, raising the seeds * 
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4 
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