Transact io7is of' the Prusskm Gardening Society. 195 



34'. Observations on the Culture of some ornamental Plaints. By 

 M. Sinning, Botanic Gardener at Poppelsdorf, near Bonn. 



M. Sinning plants Brugmansm suaveolens in spring, in 

 the open ground, on a south aspect, where the plants flower 

 beautifully and abundantly. Ahey are repotted again in 

 autumn, and kept in a dry green-house during the winter. By 

 this treatment a four years old plant produced 153 flowers 

 in July, 79 flowers in August, and several more afterwards 

 in the greenhouse. Caladiwii bicolor is not taken out of the 

 pot and kept dry, as is usually the practice, but is allowed to 

 remain in the pot. When the plants are not in a growing 

 state they are taken out of the bark bed, less water is given 

 them, and they are always repotted after flowering. By this 

 method a plant produced nine scapes, from 1 to lift, in 

 height. Caladium viviparum also treated in this way grows 

 very vigorously. — Gloriosa superba. The bulbs are kept in 

 the pots, on a shelf, in the back part of the stove, but not on 

 the flue. Only a very little water is given them, to prevent 

 the shrivelling of the bulbs. In the end of February or 

 beginning of March they are carefully taken out and re- 

 potted in fresh mould, which consists of one part turf, two 

 parts leaf mould, one part sand, and one part loam. The 

 size of the pot should be such that there is only I in. between 

 the side and the bulb, which should be covered an inch. 

 After repotting they remain on the back shelf from four to 

 six days, where the bulbs begin to swell; and after this they 

 are placed in bottom heat, where they soon begin to grow 

 very vigorously. They are allowed to remain there till the 

 stems become too high for the pit, whence they are then 

 taken into the bark bed of a stove. When they have obf 

 tained the height of from 2 to 3 ft., they must be again very 

 carefully repotted, in the above-mentioned soil, with the 

 addition of one part of well rotted cow dung. During their 

 rapid growth they require an increased supply of water and 

 syringing. By this method they will flower abundantly, not 

 only on the main branches, but even on the weaker laterals. 

 This culture is also applicable to all those Scitamineai whose 

 stems die down during the winter. 



35. On different Species ofQuercuS' 

 Tlie following species of Quercus were recommended to 

 be cultivated in consequence of the size and forms of their 

 leaves : 



Q. alba velutina, ^cerifcMia? aquatica, Castanea, falcata, 

 imbricaria, macrocarpa, nigra, palustris, rubra, tinctoria, and 



o ? 



