18 



HELIANTHEMUM Tuberaria. 



Plantain-leaved Sun- Rose. 



Sect. III. TUBERARIA. Calyx 5-sepalus, sepalis externis mi- 

 noribus vel majoribus ssepe patulis. Petala lutea, saepe basi ma- 

 cula atropurpurea notata, integra vel denticulata, serrata. Stamina 

 numerosa pistillo multo longiora. Stylus rectus subnulltis. Stigma 

 capitatum. Capsula trivalvis. Semina minuta flavescentia. Ra- 

 dices perennes lignosce seu herbacea annuce. Caules herbacei erecti 

 seu adscendentes. Folia trinervia opposita cxstipulata, superior a 

 interdum alterna, scspiiis stipulata, stipulis longis lineari acutis. 

 Flores subpaniculati vel racemosi secundi bracteati vel ebracteati. 

 DC. prodr. 1. p. 270. 



* Perennia raro fruticosa, foliis omnibus exstipulatis, caulibus basi 

 pilosis supernb glabris,Jloribus paucis bracteatis subpaniculatis. 



H. Tuberaria, perenne, raaioso, caulibus adscendentibus subsimpli- 

 cibus, foliis radicalibus in petiolum desinentibus ovato-oblongis 

 trinerviis tomentoso-hirsutis cauescentibus subtils nervosis supra 

 sulcatis ; caulinis sessilibus subglabris lauceolatis : summis alter- 

 nis, pedicellis basi bracteatis paucis subpaniculatis calyce triplo 

 longioribus, calycibus glabris nitidis, petalis obovatis distinctis 

 patentissimis. 



Helianthemum Tuberaria. DC. prodr. I . p. 270. Pers. syn. 2. p. 77. 

 Mill. diet. n. 10. Willd. enum. 2. p. 570. Spreng. syst. 2. p. 587. 



Cistus Tuberaria. Lin. spec. 741. Cavan. icon. 1. p. 65. t. 67. Willd. 

 sp. pi. 2. p. 1197. 



Perennial, herbaceous, branching round in all direc 

 tions : branches short, very hairy at the base : flowering- 

 ones lengthening out, ascending, quite smooth, of a 

 pale glaucous green. Leaves near the root opposite, 

 oblongly-ovate, obtuse, attenuated at the base and down 

 the petiole, strongly 3-nerved underneath, and furrowed 

 with 3 deep channels on the upper side, slightly ca- 

 nescent, clothed underneath with a short white toraen- 

 tum, the nerves very hairy: upper side hairy and 

 rough, the hairs decumbent, and the roughness occa- 

 sioned by innumerable minute warts that are scattered 

 all over the surface. Petioles deeply channelled on the 



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