POLYANDRIA— MONOGYNIA. Cistus. 27 



surely differ from this, and numerous species of the south of Eu- 

 rope, and the Alps, require to be studied and compared by a skil- 

 ful and patient observer. 



6'. C. toinentosus. Downy-cupped Cistus. 



Shrubby, procumbent, with hoary stipulas. Leaves ellip- 

 tic-oblong ; snow-white, with starry down, beneath. Ca- 

 lyx all over hoary, with hairy ribs; its outer leaves obtuse. 



C. tomentosus. Scop. Cam. ed. 2. v. 1. 376. /. 24. Engl. Bot. 

 r. 31.^. 2208. Comp. eJ. 4. 95. 



C. Helianthemum. Ehrh. Jrb. 126? 



On the mountains of Scotland. Mr. G. Don. 



Shrub. Juhj. 



A larger plant than the foregoing, with broader leaves, and the 

 Jiowers are conspicuous for their size as well as brilliancy. The 

 more pure white, and starry down, of the backs of the leaves, 

 the hoariness of the stipulas, and of every part of the calyx, in 

 Mr. Don's original specimen, are remarkable; and the obovate 

 obtuse form of the 2 outer cahjx-leaves, which are hoary all 

 over, and less fringed than in C. Helianthemum, should seem a 

 good specific character. Ehrhart's specimen is weak, and less 

 downy, as if it had been drawn up by the neighbourhood of 

 other plants. His stipulas moreover are green and fringed. 

 The leaves on voung lateral shoots are peculiarly rounded. 

 When cultivated together, the difference between these two 

 plants is striking. What such great practical observers as Sco- 

 poli, G. Don, and our most acute, justly lamented, Dickson 

 have asserted, I would not hastily reject ; nor can 1, with my 

 worthy friend Prof. Hooker, think C. tomentosus " not even a 

 well-marked variety." It merits at least some examination in 

 its native places of growth. In gardens it bears the name of 

 C. canus ; but the real canus has no stipulas. 



7. C. polifolius. White Mountain Cistus. 



Shrubby, procumbent, with somewhat hairy stipulas. Pu- 

 bescence starry. Leaves oblong, revolute, white and 

 downy beneath. Calyx slightly hairy ; its outer leaves 

 fringed. 



C. polifolius. Linn. Sp. PL 745. Willd. v. 2. 121 1. Fl. Br. 576. 

 Engl. Bot. V. 19. t. 1322. 



C. humilis alpinus durior, polii nostratis folio candicante. Pluk. 

 Almag. 107. Ph'jt. t.23.f. 6. 



Helianthemum montanum, polii folio incano, flore candido. Dill. 

 Elth. 175. t. 145./. 172. 



Chamsecistus montanus, polii folio. Raii %«. 342. Hill. Fl. Br. 

 274. ^.27./. 2; very bad. 



On stony hills, near the sea, very rare. 



