CLASS XIII. ORDER I.] HELIANTHEMUM. 761 



Root tapering, with branched fibres. Stem erect, round, simple or 

 branched from the base, leafy and hairy, like the rest of the plant. 

 Leaves opposite, oblong lanceolate, flat, on short footstalks, with a 

 stout mid-rib and numerous lateral veins, paler beneath. Stipules 

 linear lanceolate, acute, the margins revolute, not half as long as the 

 leaves. Flowers not very numerous, on short pedicles, opposite the 

 upper leaves, without bractea. Calyx large, of five unequal rough 

 hairy pieces. Petals small, obovate, entire, yellow, very fugacious, 

 sometimes wanting. Style short, straight. Stigma rather large, 

 capitate. Capsule large, triangular, ovate, polished, mostly hairy on 

 the angles and towards the apex. Seeds small, pale, roundish, nu- 

 merous. 



Habitat. Very rare; on sandy ground, Brent Downs, Somerset- 

 shire. Hudson, and Rev. Mr. Lightfoot. 



Perennial; flowering in June and July. 



This plant, so very rare with us, we have found not uncommon in 

 various parts of Portugal, and it is said to be found in the South of 

 France. 



4. H. ^ulga're, Gartner. (Fig. 866.) Common Rock-rose. Stem 

 shrubby, procumbent; leaves opposite, petiolated, ovate or oblong, 

 nearly flat, ciliated, hairy, or tomentose, with stipules ; racemes ter- 

 minal, bracteated ; calyx with the three inner pieces ovate lanceolate, 

 membranous, with prominent ribs; style bent at the base, swollen 

 upwards. 



Hooker, British Flora, ed. 4. vol. i. p. 214. Lindley, Synopsis, p. 

 37. Cistus Helianthemum, Linn. English Botany, t. 1321. English 

 Flora, vol. iii. p. 26. 



a. Leaves below hoary or white, with pubescence, above green^ 

 with simple or stellated close pressed hairs. 



H. vulgare. De Cand. Prod. [. p. 280. 



/3. tomentosum. Leaves elliptic- oblong, very white below, with starry 

 pubescence, above nearly smooth. 



Cistus tomentosus. English Botany, t. 2208. English Flora, vol. 

 iii. p. 27. H. tomentosum, Dun. De Cand. Prod. 1. p. 279. 



y. leptopetalum, Koch. (Fig. 666.) Petals lanceolate, often cut. 

 H. surrejanum, Mill. De Cand. Prod. 1. p. 280. Lindley, Synopsis, 

 p. 37. Cistus surrejanus, Linn, (f) English Botany, t. 2208. 

 English Flora, vol. iii. p. 25. 



Root woody, branched, and fibrous. Stems mostly numerous, pro- 

 cumbent, round, smooth, or hairy, much branched or simple, leafy, 

 terminating in a raceme. Leaves mostly numerous, opposite, petio- 

 lated, very variable, the lower ones often roundish, and the upper 

 linear oblong, green on the upper side, and more or less hairy, the 

 under green and pubescent, or quite white, with close pressed starry 

 hairs, and the margins frequently ciliated with simple ones. Stipules 

 lanceolate, green, hairy. Flowers more or less numerous, each ou a 



