MAY.] HOT-HOUSE-- OF REPOTTING, &c. 251 



much used in domestic economy. P. paludosa has the 

 most beautiful foliage, and the best haljit. The flowers 

 are dioecious. 



Roscdea. A genus of about five species, all pretty, 

 but not much known. R. purpurea has been introduc- 

 ed into our collections, and is the finest of the genus. 

 The flowers are light purple, large, and in terminale 

 sheaths at the top of the stem. R. spicdta and R. eapi- 

 tata are both fine species, with blue flowers. They are 

 all herbaceous, with strong half tuberous roots, requir- 

 ing little water while dormant, and a liberal supply 

 when growing. 



Ruellia. There are a few species, very pretty free 

 flowering plants, of easy culture. R. formosa, flowers 

 long, of a fine scarlet colour ; plant half shrubby. R. 

 fulgida has bright scarlet flowers on axillary long stalk- 

 ed fascicles. R. persicifolia, with unequal leaves, and 

 light blue flowers, is now called R. anisophylla ; and 

 the true one has oblong, wavy, leaves, deeply nerv- 

 ed, petioles long; flowers yellow, sessile, in axillary 

 and terminale heads, stem erect. One healthy plant 

 will be frequently in flower from January to June. 

 This species ought to be in every collection, both for 

 its beauty of flower and foliage. 



Rhdpis, a genus of palms, that will grow very freely 

 with heat, and room at the roots. R. flabelliformis is 

 an erect growing palm, with a spreading head. It is a 

 native of China. 



Thunbergia, a genus containing six climbing plants, 

 of a half shrubby nature. Some of them have a fra- 

 grant odour. T. coccinea, red; T. grandiflora, blue ; T. 



