31-8 ARBORETUM AND FIIUT1CETUM. PART 111. 



L 78. II. PULVERULE'NTUM Dec. The powdered-leaved Helianthemum, or 



Sun Rose. 



Identification. Dec. Fl. Fr., 4. p. 823. ; Don's Mill., 1. p. 313. 



Synunymes. Cistus pulverulentus Pour. Act. Toal. t S. p. 311. ; CIstus polif&lius Lam. Diet., 2. p. 26., 



but not of Lin. 

 Engraving. Swt. Cist., t. 29. 



Spec. Char., $c. Stem suffruticose, much branched, prostrate. Branches 

 hoary-tomentose. Leaves oblong linear, with revolute margins, obtuse ; 

 under surface hoary, upper surface glaucous. Stipules subulate, ciliated, 

 longer than the footstalks of the leaves. Calyxes hoary, minutely tomen- 

 tose, pubescent. (Don's Mill., i. p. 313.) A native of France, on sterile 

 hills ; and, according to Sweet, in cultivation in the Chelsea Botanic Garden 

 in 1826. It has white flowers, about an inch broad, which appear in May 

 and June ; and, though they are not so showy as some of the other species, 

 yet, as Sweet observes, they make a pleasing variety. It is nearly related 

 to H. apenninum. 



*~ 79. H. MACRA'NTHUM Swt. The large-flowered Helianthemum, or Sun Rose. 



Identification. Swt. Cist., t 103. ; Don's Mill., 1. p. 313. 

 Engraving. Swt. Cist., t. 103. 



Spec. Char. fyc. Stem suffruticose. Branches procumbent, rather tomentose. 

 Leaves flat, ovate oblong, acutish ; smooth above, and densely tomentose 

 beneath, pale cinereous. Stipules rather pilose, about equal to, or longer than, 

 the petioles. Calyx striated, pilose. Petals distinct. (Don's Mill., i. p. 313.) 

 The native country of this species is uncertain ; but, according to Sweet, it 

 was in cultivation in the Hammersmith Nursery in 1828. The leaves are 

 large and flat, and the flowers larger than any other in the 

 section. The petals are of a cream-coloured white, distinct, 

 spreading, and very slender at the base, where they are 

 marked with yellow. The plant is as hardy as the common 

 species. It was cultivated in the Hammersmith Nursery 7 1 

 in 1828. 

 Variety. 



!U H. m. 2 multiplex Swt. Cist., t. 104-., and our^g. 74., is 

 a beautiful plant, not only on account of its fine 

 double flowers, but of its habit of growth. It ought 

 to be in every Cistacetum. Plants of it were in the 

 Hammersmith Nursery in 1828. 



JU 80. H. RHODA'NTHUM Dunal. The red-flowered Helianthemum, or Sun 



Rose. 



Identification. Dunal, ined., and Dec. Prod., 1. p. 282. ; Don's Mill., p. 313. 



Synonymes. Cistus roseus Jacq. Hort. Fin., 3. p. 65. ? Cistus angustifblius, formerly in the Royal 



Botanic Garden at Paris. ; Cistus piluliferus Thib. ined. 

 Engraving. Swt Cist , t. 7. 



De Candolle records three forms of this species : H. r. oblongifdlium, H. r. subhirsiitutn, 

 and H. r. cdmeutn. 



Spec. Char., fyc. Stem suffruticose, procumbent. Branches rather tomentose, 

 and hoary. Leaves oblong, with revolute margins; under surface hoary- 

 tomentose, upper surface greenish glaucous. Stipules awl-shaped, pilose, 

 and bristly at the tip. Calyxes covered with short white tomentum. (Don's 

 Mil/., i. p. 313.) A native of Spain, introduced in 1800, and, according to 

 Sweet, in the Chelsea Botanic Garden in 1825. It is a very showy kind, 

 with flowers of a bright red, inclining to crimson, which it produces in 

 abundance, being quite hardy and of the easiest culture. Sweet says, " Our 

 drawing was taken from a fine plant, growing luxuriantly, with many other 

 handsome species, on the rockwork of the Chelsea Botanic Garden, in June, 

 1825. Nothing could make a more brilliant appearance than the different 

 habits of growth and beautiful flowers of various colours with which the plants 

 on this rockwork were decked every clay for about two months. II. rhodan- 

 tlmin," he adds, "also makes a handsome appearance when grown in pots." 



