212 Tllh: NATURALIST. 



Cochlearia officinalis, L. (Var. alpina, Bab. C grcenlandica, Sm., not Linn.) 



Kirby Fell ! Hawkswick Clowder ? vii. viii. 

 Draha incana, L. Gordale ! Hawkswick Clowder ! Kirby Fell! 17. vii. 

 D. muralis, L. Walls in the village of Malham, J. Nowell. Rocks near 



the foot of Malham Cove ! Gtordale ! Under Malham Cove, Dr. 



Windsor. 6. iv-vi. 

 P. verna, L. A specimen in herbarium, named D. infiata, Hook., but 



difficult to identify in the dried state, iii-v. 

 Arahis hirsuta, Br. Frequent on the limestone. Several unimportant 



varieties occur. C8. vi-viii. 



CISTACE^. 



Helianthemum vulgare, Gsert. Gordale ! Malham Cove ! 69. vi-viii. 



H. canum, Dun. Malham Cove ! This plant, subdivided by Linnaeus 

 into Cistus marifoUus, aiiglicus, etc., is by others regarded as merely 

 a dwarf form of H. vulgare. I cannot agree with those who would 

 unite the plants. The presence of stipules in one, and their absence 

 in the other is a strong point of difference. Koch groups together 

 li. fumana, Mill., and H. celandica, Wahlenb., (which includes H. 

 canum, Dun.), but H. vulgare, Gaert., and H. poUfoliimi, Pers. The 

 following diagnosis was made upon fresh specimens in August, 1859. 



Helianthemum canum, Dun. H. vulgare, Gcert. 



Root — Long, woody. 



jStem — Decumbent, shrubby, covered with /Stem — Procumbent, shrubby. 



numerous minute scars. 

 Leaves — Without stipules, ovate, opposite, Leaves — With stipules, ovate, opposite, 



flat, hoary beneath, hairy above. flattish, hoary beneath, thinly covered 



with adpressed hairs above, margin 

 slightly reflexed. 

 JRacemes — Terminal, bracteate . Bacemes — Bracteate. 



Flower-stalks — Leafed to the top. 

 Sepals — Hoary, veins indistinct. Sepals — Hoary only along the veins, in- 



tervening portions glabrous. 

 Petals — Estivation rugose. Variable, but Petals — Estivation rugose. Varying 



not so much so as H. vulgare. widely in form and size. 



Anthers — Subrotundate, notched. Anthers — Pyrulate, rugose. 



Style — Flexuose, twisted sharply at the Style — Longer than the ovary " bent at 



base, reflexed, "inflexedat the apex," the base." 



longer than the ovary. 

 Seeds — Numerous, fuscous. Seeds — Numerous, black. 



Vertical Mange— Went Yorkshire, 400-450 Vertical Pange—We^t Yorkshire, 50-570. 



nearly. North Yorkshire (J. G. Baker), North Yorkshire (J. G. Baker), 0-700 



600. North of England (Cybele Brit. iv. North of England (Cybele Brit.). Lake 



337), Lake Province, 200 ; Yorkshire. 600. Province^ 360 j Yorkshire, 600. 



