348 ARBORETUM AND FRUTICETUM. PART III. 
2. 78. H. PULVERULE’NTUM Dec. The powdered-leaved Helianthemum, or 
Sun Rose. 
Identification. Dec. FI. Fr., 4. p. 823.; Don’s Mill., 1. p. 313. 
Synonymes. Cistus pulveruléntus Pour. Act. Toul., 3. p. 311. ; Cistus polifdlius Lam. Dict., 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. 
2.79. H. macra’nruum Swit. 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. §c. 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 
in 1828. 
Variety. 
2. H. m. 2 miltiplexr Swt. Cist., t. 104., and our fig. 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. 
2. 80. H. rnopa’ntaum 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 Jacg. Hort. Vin., 3. p. 65.? Cistus angustifdlius, formerly in the Royal 
Botanic Garden at Paris. ; Cistus piluliferus Thib. ined. 
Engraving. Swt. Cist., t. 7. 
Varieties. De Candolle records three forms of this species: H. r. oblongifolium, H. r. subhirsitum, 
and H. 7. cdrneum. 
Spec. Char., §c. 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 
Miil., 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 day for about two months. H. rhodan- 
thum,” he adds, “also makes a handsome appearance when grown in pots.” 
