207 



Among greenhouse plants are : 

 Polygala cordifolia. 

 Nierembergia filicaulis. 

 Astelma eximium. 



Brugmansia suaveolens. 

 Isoplexis canariensis. 

 Convolvulus pannifolius. 



Many more are in flower besides the above, but they are unworthy the at- 

 tention of amateurs. Annuals and bedding-out plants are not mentioned. 



Royal Botanic Gardens, Kew. 



J. HOULSTON. 



EXOTIC LYCOPODS. 



At p. 175, I gave a list of the best hothouse Ferns in cultivation, 

 that are calculated to thrive in an Orchid-house, or other moist stove. 

 I now furnish a Hst of Lycopods that require nearly the same treat- 

 ment. They are equally as beautiful and interesting, and are admir- 

 ably adapted for filling up vacancies in hothouses. Many of them 

 require to be planted only once, and they will soon overspread the 

 whole surface ; others are of a very close compact habit, forming 

 neat dwarf evergreen bushes. They all like a moist shaded situation 

 to develope their delicate fronds. Of this tribe of plants there are 

 nearly 300 known species, but there are only about 30 exotic ones in 

 cultivation. They are difficult to recognise from dried specimens or 

 concise descriptions, hence I have given the names by which they 

 are usually known in gardens. 



All these, with six other undetermined kinds (exclusive of natives), 

 are at present in cultivation in the Royal Gardens, Kew, and a few 

 other kinds are known to be in cultivation among other collections. 



Royal Botanic Gardens, Kew. 



J. HOULSTON. 



