332 ARBORETUM AND FRUTICETUM. PART III. 



of flowers from the beginning of May to the end of July. It ripens seeds 

 in abundance ; but, as Sweet remarks, " the colour of the flowers varies 

 considerably on different plants," and therefore the seeds should always be 

 saved from those of the brightest colours. Plants are to be procured in all 

 the London nurseries. 



. 10. H. ^TRIPLICIFO'LIUM Wttld. The Orachc-leaved Helianthemum, o 



Sun Rose. 



Identification. Willd. Enum., 569. ; Don's Mill., i. p. 302. 



tnonyme. Cfstus atriplicifblius Lam. Diet., 2. p. 19. 

 igraving. Barrel Icon., t. 292. 



Spec. Char., fyc. Erect Branches white from leprous tomentum. Leaves stalked, broad-ovate, 

 bluntish, waved at the base, covered with leprous tomentum on both surfaces. Peduncles race- 

 mose, hairy. Calyx hairy, 3-sepaled, rarely 5-sepaled, with the two outer ones very minute. 

 (Don's Mill., i. p. 302.) A shrub growing to the height of 3 ft, with leaves like those of .4'triplex 

 //alimus ; introduced from Spain in 1826, and producing its yellow flowers in June and July. 

 Mr. Sweet observes, in 1829, that this species, he believes, has " quite disappeared from our col- 

 lections." 



. 11. H. LASIA'NTHUM Pers. The hairy-flowered Helianthemum, or Sun Rose. 



Identification. Pers. Ench., 2. p. 76. ; Don's Mill., i. p. 302. 



Sunonyme. Cistus lasianthus Lam. Diet., 2. p. 19. 



Engraving. ? Barrel. Icon., t. 289. 



Spec. Char., fyc. Stem suffruticose, and much branched. Branches dark-cinereous, at top tomen- 



tosely hairy. Leaves almost sessile, ovate-oblong, often blunt, keeled, of an obscure greyish 



colour, tomentose. Peduncles 1 2-flowered, hairy, very short. Calyx usually 3-sepaled, very hairy. 



(Don'* Mill., i. p. 302.) A shrub 3 ft high, from Spain, introduced in 1826, and producing its 



yellow flowers in June and July. 



- 12. H. INVOLUCRA V TUM Pers. The involucrated^oH^ra/ Helianthemum, 



or Sun Rose. 



Identification. Pers. Ench., 2. p. 76. ; Don's Mill., 1. p. 302. 



Synonyme. Cfstus involucratus Lam. Diet., 2. p. 20. 



Spec. Char., fyc. Branched, erect Branches rather greyish, tomentose. Lower leaves stalked, some- 

 what ovate, small, hoary-tomentose; upper ones oblong-lanceolate, sessile, greenish, and roughish. 

 Peduncles very short, surrounded by the leaves. Calyx 5-sepaled, inner ones hoary-tomentose, 

 outer ones linear, smoothish, and greenish. (Don's Mill.,i. p. 302.) An erect shrub, 2ft. high, 

 from Spain and Portugal, in 1826, which produces its yellow flowers in June and July. 



. 13. H. CHEIRANTHOI V DES Pers. The Wallflower-like Helianthemum, or 



Sun Rose. 



Identification. Pers. Ench., 2. p. 76. ; Don's Mill., 1. p. 30i 



Synonymes. Cistus cheirantholdes Lam. Diet., 2. p. 19. ; ? Cfstus elongatus Vahl. Symb., 1. p. 38. 



Cfstus Aalimifolius, ii., Cltis. Hist., 1. p. 71. 

 Engraving. Swt Cist, 1. 107. 



Spec. Char., Sfc. Erect, branched ; younger branches villously tomentose, 

 hoary. Leaves tomentose, hoary, oblong-lanceolate, tapering into the foot- 

 stalks. Peduncles very short, 2-flowered. Calyx somewhat villous, 5- 

 sepaled, outer sepals very minute. (Don's Mill., i. p. 303.) An erect hand- 

 some bushy shrub, growing to the height of 3 ft., and producing yellow 

 flowers, without dark spots on the petals, in July and August. This very 

 handsome species, Sweet observes, was in the Bristol Nursery in 1828. 



a. 14. H. CA'NDIDUM Swt. The white-leaved Helianthemum, or Sun Ro.ie. 



Identification. Swt. Cist, t. 25. ; Don's Mill, 1. p. 303. 

 Engraving. Swt Cist, t 25. 



Spec. Char., fyc. Erect. Branches leprously white. Leaves, which are obovate- 

 lanceolate, equally white on both surfaces, and tapering to the base ; some- 

 what stalked, upper surface pilose, under s urface scabrous from papillae, 

 rather 3-nerved ; floral ones opposite, sessile, and green on both surfaces. 

 Peduncles long and rather panicled, glabrous or with a few scattered hairs. 

 Calyxes with 3 or 5 acute sepals, villous. Petals imbricated. (Don's 

 Mi/I., i. p. 203.) A shrubby, erect, much branched plant, from Spain, with 

 bright yellow flowers from June till August. When it was introduced is 

 uncertain, but in 1826 it was in the Fulham Nursery, under the name of II. 

 algarvense. It is somewhat tender, but a highly ornamental species, the 

 flowers resembling those of Calliopsis bicolor. 



