372 70. URTICACEiE. 



Cannabis sativa, Linn. 



Area (1 &c.) 



Alien. Occasionally seen on waste ground in the south 

 of England, perhaps introduced casually by the seeds in 

 use for feeding caged birds, like the Phalaris canariensis 

 and Linum usitatissimum, which occasionally are distri- 

 buted by the same agency. Scarcely requiring to be men- 

 tioned among British plants ; but it was taken into the list 

 of " Excluded Species " in the London Catalogue of Bri- ^/^^a,. 

 tish plants, from s omo botanie a l work, the rcfcr ence-te-/ ^Z". 

 whirh has been since mislaid . A^-'^^^ /^*t^tA.W; ^d^^ 



983. HuMULUs LupuLUS, Linn. 



Area 1 2 3 4 5 6 7 8 9 10 11 12 (13 14 15). 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Cumberland, Westmoreland, Durham. 



Estimate of provinces 12. Estimate of counties 50. 



Latitude 50 — 55. English type of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 52 — 47. 



Denizen. Septal. Has the hop been introduced into 

 Britain by human agency, or is it an aboriginal native ? If 

 native, how much of its present area, how many of its loca- 

 lities, should be deemed natural ? — and how much of that 

 area, how many of those localities, may be considered arti- 

 ficial ? Who can undertake to answer these questions with 



certainty 1 Henslow and Babington let the Humulus 



•i 



A 



