68 44. COMPOSITE. 



587. BORKHAUSIA SETOSA, DC. 



Area (* 23**^**9***** 15). 



Alien. Occasionally introduced with foreign seeds of 

 the meadow clover, but is soon lost again through the rota- 

 tion of agricultural crops. 



588. Taraxacum officinale, Wigg. 



Area general. 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Shetland, Orkney, Hebrides. 



Estimate of provinces 18. Estimate of counties 82. 



Latitude 50 — 61. British type of distribution. 



A. A. regions. Inferagrarian — Midarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 900 yards, in East Highlands. 



Range of mean annual temperature 52 — 39. 



Native. Pascual. Rare above the agrarian region ; being 

 usually represented by T. palustre in the arctic region. 

 Different as these two quasi-species may be in their ex- 

 treme forms, there are transition varieties of each which 

 certainly approximate to, and yet I cannot absolutely say 

 that they pass into, each other. If cultivated in rather 

 dry garden ground, T. palustre does not fully change into 

 the ordinary T. oflBcinale, although the involucral scales 

 do spread much and become slightly reflexed. 



