330 APPENDIX. 



13. HELIANTHEMUM CANADENSE, Canada Sun Rose. 



This very pretty herbaceous Perennial, succeeds best in 

 peat soil, either to be planted in a bed amongst other 

 American plants, or to form a patch by itself in a border 

 of the flower garden, but planted in peat. Care must be 

 taken that it is not killed in the drought during the sum- 

 mer. Its handsome flowers are produced in abundance in 

 July and August, after that time it continues to bloom and 

 ripen seeds plentifully until October. It is sufficiently 

 hardy to endure our winters in the open air without pro- 

 tection ; but as it dies down to the ground in winter, many 

 people might suppose it dead and throw it away, particu- 

 larly when grown in pots, it should therefore have a label, 

 with the name, to ensure preservation. 



Seeds of it ripen plentifully, but they must be gathered 

 as soon as ripe, as the capsule soon bursts, and the seeds 

 are then lost. The seeds should be sown early in the 

 spring in pots, and as soon as they are got into the third 

 leaf they should be pricked out separately, or several in 

 one pot, or they will be very liable to damp off, if kept 

 too long in the seed pot. 



It is a native of North America. 



14. CISTUS CRISPUS, Curl-leaved Rock Rose. 



This is a very pretty and distinct species, and is a native 

 of the South of Europe. 



If planted in a sheltered situation it will stand the seve- 

 rity of the winter without protection. It makes a pretty 

 bushy plant, and its flowers are produced in succession 

 from June to August, and sometimes will produce seed. 



