chap. xi. cism^CEJE. helia'nthemum. 339 



Calyx somewhat globose-ovate. (Don's Mill., i. p. 308.) Found in the 

 Alps of France, Switzerland, and Austria ; introduced in 1810; and, in our 

 gardens, a low trailing shrub, producing yellow flowers from June to 

 August. It is nearly related to H. alpestre, but has narrower leaves and 

 smaller flowers, and is of weaker growth. Plants were in the Chelsea 

 Botanic Garden in 1828. 



<u. 37. H. pulche'llum Swt. The neat Helianthemum, or Sun Rose. 



Identification. Swt. Cist., t 74. ; Don's Mill., 1. p. 308. 

 Synonyme. H. alpestre Spreng. Syst., 2. p. 590. 

 Engraving. Swt. Cist., t 74. 



Spec. Char., $c. Stem suffruticose, procumbent, branched. Branches clothed 

 with hoary tomentum. Leaves roundish or ovate, obtuse, upper surface 

 green, beset with hispid hairs ; under surface clothed with hoary tomentum, 

 with the margins a little revolute. Racemes simple. Calyxes pilose, 

 hoary. Petals imbricate. (Don's Mill.,\. p. 308.) A native of Germany, 

 introduced in 1820, and producing its yellow flowers from June to August. 

 A neat little prostrate shrub, hardy, and of the easiest culture. Plants were 

 in the Roehampton Nursery in 1828. 



<U 38. H. alpe'stre Dunal. The Alpine Helianthemum, or Sun Rose. 



Identification. Dunal ined., and Dec. Prod., 1. p. 276. ; Don's Mill., 1. p. 308. 



Synonymes. Cistus alpestris Crantz Austr., p. 103. t. 6. f. 1., Wahl. Helv., p. 103. ; CIstus celandieus 



Jacq. Austr., t. 399. 

 Engravings, Crantz Austr., t. 103. t. 6. f. 1. ; Jacq. Austr., t. 399. 

 Varieties. De Candolle records H. a. glabratum, H. a. elongatum, and H, a. candscens. 



Spec. Char., fyc. Stem suffruticose, procumbent, branched. Branches pilosely 

 hairy. Leaves greenish on both surfaces, oblong-elliptical, rather glabrous, 

 or with hairs in fascicles, stalked ; upper leaves almost sessile. Pedicels and 

 calyxes pilosely hairy. Hairs cinereous. (Don's Mill., i. p. 308.) A native of 

 Germany, Switzerland, France, and Italy, on rocks. It was introduced into 

 England in 1818, and produces its yellow flowers, large for the size of the 

 leaves, in July and August. It is an elegant little plant, and quite hardy. 

 It was in Mr. ColvilPs Nursery, Chelsea, in 1824. 



<u 39. H. penicilla'tum Thib. The pencilled Helianthemum, or Sun Rose. 



Identification. Thib. ined., and Dec. Prod., 1. p. 277. ; Don's Mill., 1. p. 309. 



Synonymes. Cistus ^chioides Lam. Diet., 2. p. 21. ; Cistus anglicus Lin. Mant., 245. ? 



Spec. Char., S^c. Suffruticose. Branches procumbent, long, hispid. Leaves green, with the leaves on 

 both surfaces hispid, as well as the margins; lower leaves stalked, ovate, smaller; upper ones 

 linear-oblong, almost sessile. Racemes simple, and are, as well as the calyxes, hispid. Flowers 

 minute. (Don's Mill., i. p. 309.) A native of France and Spain, and introduced in 1826. It is a 

 trailing plant, with the habit of Echinospi-rmum Lappula. Introduced in 1826, and producing its 

 yellow flowers from June to August. 



)U 40. H. obova^tum Dunal. The obovate-leaved Helianthemum, or Sun 



Rose. 



Identification. Dunal ined., and Dec. Prod., 1. p. 277. ; Don's Mill., I. p. 309- 



Synonymes. Cistus italicus Lin. Sp., 740. 



Spec. Char., S(C. Suffruticose. Branches spreading, somewhat dichotomous, clothed with cinereous 

 tomentum towards the apex. Leaves obovate, or oblong-obtuse, green on both surfaces, ciliated, 

 pilosely strigose; lower leaves minute. | Racemes simple, 3-flowered. Bracteas green. Calyxes 

 pilose, cinereous. (Don's Mill., i. p. 309.) Found in Spain, near Aranjuez, where it produces its 

 yellow flowers in June and July. It was introduced in 1826; and, in British gardens, is a trailing 

 plant, about 1 ft. in height. 



<U 41. H. ita'licum Pers. The Italian Helianthemum, or Sun Rose. 



Identification. Pers. Ench , 2. p. 76. ; Don's Mill., 1. p. 309. 



Synony?nes. Cistus italicus Lin. Sp., 740. ; Cistus warifdlius Bieb. Fl. Taur. Cauc, 2. p. 8. 



Engraving. Barrel. Icon, rar., 510. t. 366. 



Varieties. De Candolle distinguishes three forms of this species, viz. H. i. strigbsum, H. i. candidissi- 

 mum, and H. i. dlbidum. 



Spec. Char., S(C. Suffruticose. Branches simple, erect, long, pilosely tomentose. Leaves pilosely his- 

 pid ; hairs strigose, appressed ; lower leaves ovate, smaller; upper ones lanceolate, oblong or oblong- 

 linear. Racemes simple, and are, as well as the calyxes, pilosely hispid, canescent. (Don's Mill., i, 

 p. 309.) A native of the Mediterranean, on dry hilly surfaces. Introduced in 1799, and producing 

 its yellow flowers from July to September. It is a glaucous-looking trailing plant, seldom exceed- 

 ing I ft in height. 



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