170 6. CISTACE^. 



r27. Reseda FRUTicuLosA, Z/»«.^'^^'^-^-''*V^ 

 127, b. Reseda alba, Linn. 



Area (12*456*8 9if-f-12 * 14). 



Alien. Cultivated in gardens, under the name of 

 "upright Reseda," and occasionally found by road sides and 

 in comers where garden refuse is thrown out ; particulai-ly 

 near the sea shore, where the winter cold is not severe 

 enough to destroy the plants. It is not easy to distinguish 

 R. fruticulosa from R. alba, and they ai"e probably a 

 single species only ; sometimes the one name, sometimes 

 the other, is connected with the localities ; but I doubt 

 whether the reporters usually know for certain which spe- 

 cies or variety they really mean by the names. The num- 

 ber of petals is assiu-edly inconstant in R. fi-uticulosa and 

 other species ; for it varies in different flowers on the same 

 single plant. 



128. Helianthemum vulgare, Gaert. '4 />/ ''//.^- ^^7 

 128, b. Helianthemum surrel\num. Mill. 

 128, c. Helianthemum tomentosum, (Dun.?) 



Area 1 2 3 4 5 6 7 8 * 10 11 12 13 14 15 * 17. 

 South limit in Devon, Isle of Wight, Kent. 

 North limit in Ross-shu*e and Lanarkshire. 

 Estimate of provinces 16. Estimate of comities 70. 

 Latitude 50 — 58. British type of distribution. 

 A. A. regions. Inferagrarian — Inferarctic zones. 

 Descends to the coast level, in the Peninsula. 

 Ascends to 600 or 650 yards, in East Highlands. 

 Range of mean annual temperature 51 — 41. 



