b 



54. OROBANCHACE^. 229 



relations of the present species, I have left out of view all 

 the localities recorded for " O. minor," in which it is men- 

 tioned as growing on Ivy ; the species of the Hedera Helix 

 being now considered quite distinct from the one here 

 under consideration, and now described in recent works 

 under name of O. barbata and O. Hederse. This latter 

 would seem to prevail in, if not limited to, the western 

 counties ; while the O. minor occurs chiefly in the eastern 

 counties, and thus inclines to the Germanic type of distri- 

 bution. 



793*. Orobanche Hedera, Duby. 



Area 12**567. 



South limit in Cornwall, Isle of Wight, ? 



North limit in Caernarvon, ? 



Estimate of provinces 7. Estimate of counties 15. 



Latitude 50 — 54. Atlantic type of distribution. 



Agrarian region. Inferagrarian zone. 



Descends to the coast level, in the Peninsula. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 52 — 49. 



Native. Rupestral ? Parasitical on Hedera Helix. The 

 habitats for this species having usually been recorded un- 

 der O. minor, it will at present appear more rai-e than is 

 really the case. But uniting together the localities pub- 

 lished for O. Hederae or barbata, and those for " O. minor," 

 in which the latter is expressly mentioned to grow on 

 Ivy, we shall obtain records in the following counties : — 

 Cornwall, Devon, Somerset, Isle of Wight, Gloucester, 

 Monmouth, Glamorgan, Pembroke, Brecon, Merioneth, 

 and Caernarvon ; to which several others will very likely 

 need to be added eventually. 



