326 ARBORETUM AND FRUTICETUM. TART III. 



in Spain and Portugal, and introduced into England in 1656. It is erect, and not much branched • 

 quite hardy, or requiring only very slight protection in very severe frost. Dumont thinks it pro- 

 bable that it is only a variety of C. Zedon. 



* 27. C. oblongifo x lius Swt. The oblong-leaved Cistus, or Rock Rose. 



Identification. Swt. Cist., t. 87. ; Don's Mill., 1. p. 300. 

 Engraving. Swt. Cist., t. 67. 



Spec. Char., fyc. Erect. Branches hispid, villous. Leaves on short foot- 

 stalks, oblong-lanceolate, obtuse, pubescent, and waved at the margins; 

 under surface veiny. Peduncles cymose. Petals concave, imbricated. 

 (Don's Mill., i. p. 300.) A native of Spain, attaining the height of 4 ft., and 

 producing its white flowers in June and July. When it was introduced into 

 England is uncertain ; but Sweet found plants which appeared to him to 

 be of this species in ColvilPs Nursery in 1826. It forms a strong hand- 

 some evergreen shrub, which is quite hardy, and of the easiest culture. 



n. 28. C. asperifo x lius Swt. The rough-leaved Cistus, or Rock Rose. 



Identification. Swt. Cist., t. 87. Don's Mill., 1. p. 300. 

 Engraving. Swt. Cist., t. 87. 



Spec. Char., cfc. Leaves almost sessile, ovate-lanceolate, acute, 3-nerved, 

 wrinkled, smoothish, with wavy margins, somewhat denticulated, ciliated, 

 netted with veins beneath, with the nerves and veins rough. Flowers 

 cymose. Peduncles and calyxes hairy. Petals imbricate. (Don's Mill., i. 

 p. 300.) A shrub growing to the height of 2 ft., and producing its large 

 white flowers from May to August. Its native country is uncertain ; and 

 Sweet says it may probably be a garden production, and, if so, intermediate 

 between C. laxus and C. oblongifolius. It forms a handsome, strong, up- 

 right, evergreen shrub, and is quite hardy, producing its flowers all the sum- 

 mer, and till late in autumn, in the open border. There were plants ofit in 

 Colvill's Nursery in 1826. 



»- 29. C. psilose'palus Swt. The glabrous-sepaled Cistus, or Rock Rose. 



Identification. Swt. Cist, t. 33. ; Don's Mill., 1. p. 300. 

 Engraving. Swt. Cist., t. 33. 



Spec. Char., Sf-c. Leaves on short footstalks, oblong-lanceolate, 3-nerved, acute, 

 with undulated margins, which are somewhat denticulated and ciliated, rather 

 hairy. Flowers somewhat cymose. Peduncles hairy, tomentose. Sepals 

 with long points, glabrous, shining, and with ciliated edges. Petals broad, 

 cuneated, imbricated. (Don's Mill., i. p. 300.) A shrub growing from 2 ft. to 

 3 ft. high, with white flowers in July and August. Apparently a garden 

 production. Plants of it were in the Hammersmith Nursery in 1826. 

 It approaches near to C. longifolius, but is very different, according to 

 Sweet, from that species. The plants are bushy, and the shoots are ter- 

 minated by large cymes of white flowers, which open in succession, and 

 produce a contrast with the dark green leaves with which the plants are 

 clothed. 



b. Peduncles with small, concave, coriaceous, yellowish, decussate, caducous Brac- 

 tcoles at the Base ; and with two larger opposite ones beneath the Middle. 



«l 30. C. longifo v lius Lam. The long-leaved Cistus, or Rock Rose 



Identification. Lam. Diet., 2. p. 16. ; Don's Mill., 1. p. 300. 



Synonymes. Cistus nigricans Pourr. Act. Tout., 3. p. 311. ; C. populifblius var. longifblius Dumont. 



Spec. Char., S(C. Leaves on short peduncles, oblong-lanceolate, with waved and pubescent margins ; 

 under surface veiny. Peduncles cymose. {Don's Mill., i. p. 300.) A shrub growing to the heiglit 

 of 4 ft., and producing its white flowers in July and August. It does not appear to have been 

 introduced into England. Dumont de Courset, in his Botaniste Cultivateur, says that this species 

 is only a variety of C. populifbliusj seeds of the latter having, with him, produced the former. 



* 31. C. poihjlifo'lius L. The Poplar-leaved Cistus, or Rock Rose. 



Identification. Lin. Sp., 736. ; Don's Mill., 1. p. 300. 



Synonymes. Cistca Feuilles de Peuplier, Fr. ; Pappel-bliittrige Cisten Rose, Get: 



Variety. 



tt C. p. 2 minor Dec. Prod., 1. p. 266. — Peduncles and calyx smoothish, shining, clammy. Z.edon 

 lattf&Hum, ii., Clus. Hist., i. p. 78. , CistUI /.-opulilblius Cav. Icon., 3. 215., Swt. Cist., 23. 



