Book  (1855)  Page(s) Appendix, p. xxii.  
 
The Persian rose, apparently R. collina, Gul eeran bears a very full-petaled blossom, assuming a darker shade as these approach nearer to the centre ; but, it is difficult to obtain a perfect flower, the calyx being so apt to burst with excess of fulness, that if perfect flowers are required, a thread should be tied gently round the bud ; it has no fragrance. A more sandy soil will suit this kind, with less moisture.

Book  (1850)  Page(s) Vol. II, pp. 171.  
 
Rosa collina, pink. Persian rose, [blooms] may, june, july. 3 ft.

Book  (1850)  Page(s) Vol. II, p. 22.  
 
The Persian rose, apparently R. collina, Gul eeran bears a very full-petaled blossom, assuming a darker shade as these approach nearer to the centre; but, it is difficult to obtain a perfect flower, the calyx being so apt to burst with excess of fulness, that if perfect flowers are required, a thread should be tied gently round the bud; it has no fragrance. A more sandy soil will suit this kind, with less moisture.