84 PRESENT-DAY GARDENING 



pruning; indeed, they are all the better for an annual 

 spurring, particularly when they are grown up pillars or 

 against a wall in a conservatory. The hottest house is 

 not too hot for them, yet they can be successfully grown 

 in an ordinary greenhouse if only they are allowed plenty 

 of summer sunshine. Broadly speaking, the only species 

 is B. glabra, but it has sported freely, the most distinct 

 varieties being spectabilis, Sanderiana, Cypheri, latemtia, 

 and Maud Chettleburg. The last-named has salmon-red 

 flowers ; but it is not so floriferous as the others, the best 

 being Sanderiana. 



BOUSSINGAULTIA 



Half-hardy, tuberous-rooted plants. B. baselloides, the 

 only well-known cultivated species, has alternate, entire, 

 fleshy leaves, and long clusters of small, fragrant, whitish 

 flowers ; the rapid growing, red-tinged, twining stems pro- 

 duce tubercules, which are an easy means of increase. 

 Generally grown as a climber or trailer in a warm house, 

 to flower in autumn ; sometimes also as a basket plant. A 

 rich sandy compost and a sunny position suit it. 



C^ESALPINIA 



An ornamental genus of Leguminosae, most of the 

 species being tropical and held in little favour in this 

 country because they are large-growing and take a long 

 time to grow to the flowering stage. C.japonica (sepiaria), 

 a wall-plant of spreading habit, has spiny branches, bipin- 

 nate leaves, and golden flowers with reddish anthers, pro- 

 duced in large, terminal racemes. C. Gilliesii is a beautiful 



