63. POLYGONACE^. 343 



*-^^^'^>0V2^ 944*. RuMEX AQUATicus, Linn. 



Area [1 ^, * 4 5] ^ * * * 10 11 12 13 14 15 16 17 18. 



South limit in York, ? 



North limit in Shetland, Hebrides, ? ^c^^*-^ 



Estimate of provinces 10. Estimate of counties 40. 



Latitude 54 — 61. Scottish type of distribution. 



Agrarian region. Midagrarian — Superagrarian zones. 



Descends to the coast level, or nearly so, in Lowlands. 



Ascends to 500 yards, in East Highlands. 



Range of mean annual temperature 47 — 42. 



Native. Pratal, Inundatal, &c. Considerable confusion 

 has occurred between this plant and R. Hydrolapathum, 

 on the one side, and between this and R. crispus, on the 

 other side ; in the former case, through misapplications of 

 name ; in the latter, through the close resemblance of the 

 two plants, which barely admit of specific distinction by 

 printed characters. R. aquaticus appears to be a frequent 

 plant in damp ground in the mountain valleys, and perhaps 

 may rise to the inferarctic zone. 



\ 



944. RuMEX CRISPUS, Linn. 



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. 

 Agrarian region. Inferagrarian — Superagrarian zones. 

 Descends to the coast level, in the Peninsula. 

 Ascends to 150 yards, in the East Highlands. 



