17^ ON THE CULTIVATION OF THE GUAYA (PSIDTUM CATTLEYANTJM) . 
Theophrastus classes the Eose-tree with woody and perennial shrubs, and mentions it 
among those plants which have their fruit growing under the flower ; a peculiarity, he adds, 
which on account of its great size is very plainly to be seen in the Rose-tree. He says 
that Roses may be distinguished from one another by the roughness or smoothness, colour 
or smell, and the greater or smaller number of their flower-leaves, and by the latter 
character he classifies those he mentions, which are four in number, namely, the Five, 
Twelve, Twenty and Hundred-petalled Rose. 
The first of these, or the Five-petalled Rose, is considered by Stackhouse to have been 
the Rosa canina, or Dog Rose, of Linnaeus. 
The second, or Twelve-petalled, has not been as yet referred to any species with which 
we are acquainted. 
The third, or Twenty-petalled, is thought to resemble the Rosa cinnamomea or Cinnamon 
Rose, and 
The last, or Hundred-petalled Rose, is regarded as the Rosa Centifolia, or Hundred- 
leaved Rose, with which almost every one is well acquainted. 
Of the last of these Roses, Theophrastus says, the inner flower-leaves are exceedingly 
small, for the mode of blossoming is such that some are turned inwards, and some 
outwards ; that is to say, some of the petals curl towards the centre, while others expand 
towards the circumference. The greater number of this kind of Rose, he adds, are found 
in the neighbourhood of Philippi. 
He further states that the Rose is not a large flower, and what appears singular and 
almost incredible, that it has not a pleasant odour. 
From what has been said, it will be seen that this writer gives no very detailed 
account of the Roses he has mentioned. 
We shall next pass on to Pliny. 
ON THE CULTIVATION OF THE GUAVA (PSIDIUM CATTLEYANUM.) 
By Mr. William Tillery, Welheck. 
As the cultivation of the Guava is not generally followed with that attention that the 
excellence of its fruit merits, I therefore beg to give a short account of its management at 
this place, where I have been successful in fruiting it for many years past. The fruit of 
this variety is highly prized by some, both for dessert and ice, despite its slight turpentine 
flavour; and as the trees in general ripen two crops in the course of the autumn and 
winter months, they fill up a vacancy in the way of variety at a time when other fruit are 
scarce. We have four trees planted here on the back of a large orangery ; their branches 
are trained horizontally, and as they break nearly opposite one another, they are tied to 
the wires with symmetrical effect. The soil they are planted in is a rich sandy loam 
mixed with peat. The border is only 2 feet wide and about 18 inches deep, and well- 
drained. As the roots of the Guava are very fibrous they do not range over so large a 
surface as many would suppose, but they require good doses of liquid manure during the 
period of swelling their fruit. At this place I frequently water them from a tank where 
deer's dung has been steeped in, and they seem to thrive amazingly with it. As soon as 
the flower-buds begin to show, the shoots are stopped, and during the blossoming period 
the trees are frequently syringed with a fine syringe, as I find the fruit sets better by this 
method than keeping them dry. When they set too thick, I thin them out to three or 
four on a spur, so as to have them large and fine. Near the tops of the trees, where 
there is plenty of light, the fruit grow as large as a middling-sized plum, and even in 
the middle of winter are as black as sloes in colour. They are then deliciously flavoured, 
something like a strawberry, with a slight aromatic taste. The only insect that infests 
the Guava much, is the thrips ; they pierce the cuticle of the young fruit, turning them 
to a rusty colour, which makes them crack before they are ripe. This pest is easily got 
