GREENHOUSE AND CONSERVATORY PLANTS 151 



mouth of the tube exactly in the position occupied by the stigma 

 of the long-styled flower. The pollen of the Primrose is ripe before 

 the petals are expanded, but at this stage the stigma of the same 

 flower is not in a condition to receive it. Those flowers having 

 elongated styles are easiest to manipulate, and if I am not mistaken, 

 they are the best seed bearers. Pollen, from either short or long- 

 styled flowers, may be applied to the stigmas. When it is necessary 

 to pollinate those with short styles, it is, of course, impossible to get 

 at the stigmas with a small brush, owing to the anthers filling the 

 mouth of the corolla tube, but with a pair of small scissors the corolla 

 tube may be snapped in two immediately below that part to which 

 the stamens are attached, thus giving easy ingress to the stigma. 

 Keep the atmosphere as dry as possible while fertilization is taking 

 place. 



REINWARDTIA (Linum). R. Irigyna and R. telragyna are 

 both desirable Winter-flowering plants. R. trigyna is the best 

 known; the other one has light yellow flowers and is the most 

 floriferous. 



Culture. They may be planted outside, middle of May, and 

 lifted during the end of September, if large specimens are required 

 for the greenhouse; or from cuttings rooted in April they may be 

 grown on in pots, pinching occasionally. 



Propagation. They are increased by cuttings from the strong 

 growths which start from the base when the plant is cut down. 

 R. trigyna is the only one which seeds freely. 



RHIPSALIS. There are over a dozen species of this curious 

 genus in cultivation. They are interesting because of their long 

 hanging growths and berries resembling those of the Mistletoe. 



Culture. They are best grown along with Cactus plants and 

 will thrive under similar treatment. 



Propagation. They are very easily propagated by the use of 

 cuttings. 



ROSES (See page 341.) 



RUELLIA. For a greenhouse plant for amateurs R. macrantha 

 is one of the best. The flowers are very large, tubular-shaped and 

 magenta in color. 



Propagation. Cuttings rooted in September will furnish fair- 

 sized flowering plants by the end of January. These may be planted 

 out end of May, in the open ground ; by the end of September they 

 will have made considerable growth; and if large specimens are 

 wanted they may be hfted and potted. 



