ON GREENHOUSE PLANTS. 719 



winter, and any decay must be removed directly it appears. 

 They are very useful for winter blossom. The colours range 

 from white, pale pink, rose, and crimson, to blue. Height 

 Sin. 



P. obconica, P. cortusoides, P. floribunda, P. verticillaia, 

 and P. japonica are fine species for spring flowering. They 

 may all be grown in the cool pit during winter, and in frames 

 during summer. Raise from seed sown in spring, or from 

 divisions in the summer after flowering. P. obconica is poisonous 

 to some people, causing a painful rash wherever it touches, and, 

 therefore, it requires careful handling. The blossoms of 

 P. obconica are white, pale blue, and rose ; P. cortusoides, varies ; 

 P. floribunda and P. verticillata, yellow ; and P. japonica, 

 varies. Height 6ih. 



Reinwardtia (Zinum) trigynum is a very pretty perennial, 

 having bright yellow flowers. Propagate by cuttings of the strongest 

 points of the old plants in April or May ; strike in the warm 

 pit, and grow in a frame during summer, giving plenty of sun. 

 Pinch several times, and grow in loam, peat, and sand. Remove 

 to the cool pit in autumn, and place in the warm pit to open 

 the flowers in winter. Height 2ft. 



Rivina humilis is a most interesting plant, on account of its 

 bearing racemes of beautiful red berries, resembling currants, but 

 the flowers are of no account. Propagate either by seeds sown 

 in February or by cuttings, taken in summer and struck in the 

 warm pit. Grow in the warm pit in loam, leaf-soil, and sand, and 

 pot on till 8in. pots are reached. Grow as standards, having a 

 stem 2^ft. long, and pinch off all laterals. The plants require 

 staking, and the shoots forming the head to be trained. 



Salvias. — There are many species of these very useful for the 

 greenhouse, blossoming in autumn and winter. Propagate by 

 division in spring or by , cuttings either in autumn or in spring. 

 Strike in gentle bottom-heat, growing in the cool pit, and out- 

 side in summer up till late autumn, when take them in, and 

 place in the warm pit to open the flowers. After flowering, cut 

 the plants back, keep in a cool frame, and start again in spring. 

 Grow in light, rich soil, and flower in ioin. pots. Sorts : 

 S. coccinea, S. fulgens, S. rutilans, S. splendens, S. purpurea, and 

 S. involucrata. S. coccinea, S. fulgens, S. rutilans, and S. splendens 

 have scarlet, £. purpurea purple, and S. involucrata red blossoms, 

 which are borne on long spikes ; they are labiate or lipped, 

 resembling in shape the Dead Nettle, and are very effective. 

 Height 2\it. 



Schizanthus pinnatus is a beautiful annual, and may be had 

 in flower all through - the summer and well into the autumn by 

 sowing in succession from March. Seeds sown in autumn will 



