CHAP. XI. 



ClSTA^CEvE. HELIA'NTHEMUM. 



343 



H- 54. H. barba''tum Pers. The bearded-rac^jjied Helianthemum, or Sim-Rose. 



Identification. Pers. Ench., 2. p. 79. ; Swt. Cist, t. 73. ; Don's Mill, 1. p. 311. 

 Synonyme. Cistus barbatus Lam. Diet, 2. p. 24. 

 Engraving. Swt. Cist, t. 73. 



Spec. Char., S^c. Stem siifR-uticose, erect, much branched. Branches clothed 

 with fascicled hairs. Leaves hairy, green on both surfaces ; lower ones 

 roundish-ovate, upper ones elliptical. Stipules oblong, ciHated, hairy, longer 

 than the footstalks of the leaves. Racemes long, hairj', bearded, many-flow- 

 ered. Calyxes warted, hairy. Petals crenulated, imbricate at the base. 

 (Don's Mill., i. p. 311.) A native of the south of Europe, producing its 

 yellow flowers in June and July. It is an upright-growing shrub, and was 

 introduced in 1820. It is a very distinct species, a free grower, and requires 

 no protection. Plants were in the Chelsea Botanic Garden in 1828. 



lt~ 55 H. leptophv'llum Dunal. The slender-leaved Helianthemum, or Sim 



Rose. 



Identification. Dunal. ined., Dec. Prod., 1. p. 279. ; Don's Mill., 1. p. 311. 

 Synonymes. Cistus angustif61ius Lag. ; C. stoechadifdlius Hort. 

 Engj'aving. Swt. Cist, t 50. 



Spec. Char., Src Stem sufl^ruticose, woody, rather procumbent, branched. 

 Branches ascendent, rather tomentose, greyish. Leaves narrow, oblong-hnear, 

 tapering into the short footstalks, with revolute margins ; under surface co- 

 vered with short cinereous tomentum ; upper surface smoothish, green. 

 Stipules awl-shaped, pilose, scarcely longer than the footstalks. Racemes 

 long. Calyxes covered with long hairs. (Do7i's Mill., i. p. 311.) A trailing 

 plant, from Spain, in 1818, producing yellow flowers in June and July, It 

 is a vigorous-growing plant, very distinct in its appearance, and very hardy. 

 The petals of the flowers are large, and of a fine dark yellow. Plants 

 were in the Chelsea Botanic Garden in 1826. 



56. H. ACUMiNA^TUBi Pers. The acuminated Helianthemum, or Sun. 



Rose. 



Identification. Pers. Ench., 2. p. 79. ; Don's Mill., 1. p. 311. 



Synonymes. Cistus ^erpyllifblius Balb. ined.; Cistus acuminatus Fiv. Fragm., 13. t 14. f. 1. 



Spec. Char., ^c. Branches erect, pilose at the base and at the apex, middle naked. Leaves on long foot- 

 stalks, oblong, with revolute margins, green on both surfaces, pilose ; under surface rather tomen- 

 tose. Stipules smoothish, linear, longer than the footstalks of the leaves. Racemes rather hairy, 

 few-flowered, loose. Calyxes smooth, shining, transparent {Don's Mill., \. p. A native of 



Nice, and cultivated in British gardens in 1820 : it grows to 1 ft in height, and produces its yel- 

 low flowers in June and July. 



tv. 57. H. 5ERPYLLiF0^LiUM Mill. The Wild-Thyme-leaved Helianthemum, 



or Sun Rose. 



Identification. Mill. Diet No. 8. ; Swt Cist., t. 60. ; Don's Mill., 1. p. 311. 

 Synonyme. CSstus «erpyllifblius Lin. Sp., 743. 

 Engraving. Swt Cist, t 60. 



Spec. Char., ^'c. Stem suffruticose. Branches ascendent, glabrous at the base, 

 and pilose at the apex. Leaves oblong-elliptical, with revolute margins ; un- 

 der surface hoary-tomentose; upper surface intensely green, shining, at first 

 rather pilose, afterwards almost smooth. Stipules and bracteas green, 

 ciliated. Calyxes canescent, with inconspicuous down, and with the nerves 

 sparingly pilose. {Don's Mill., i. \). 311.) A trailing shrub, with large 

 yellow flowers, the petals of which are distinct. It is found on the Alps of 

 St3Tia and Austria, as well as on the mountains of Spain. It was intro- 

 duced into our gardens in 1731, and continues in flower from May to Sep- 

 tember. It was found wild in Somersetshire, by Mr. Sweet and some 

 others, in 1 826, in which year there were plants of it in Mr. Colvill's Nur- 

 sery, Chelsea. 



58. H. vuLGA^RE Gcert. The common Helianthemum, or Sun Rose. 

 Identification. Grort Fruct., 1. p. 371. t 76. ; Don's Mill., 1. p. 311. 



Synonyme. Cistus Heli&nthemura Lin. Sp., 1. p. 744., Fl. Ban., t. 101., Smith's Engl. Bot., 1321., 

 Curt. Fl. Land., fasc. 5. t. 36. 



