20. OXALIDACE/E. 271 



It would hence seem that shade doubly operates in the dis- 

 tribution of plants, through its effects on their vitality and 

 opportunity of reproduction ; namely, both by affording a 

 screen from the too fervid rays of the sun during day, and 

 also by preserving them from the cold consequent on ra- 

 diation during night. 



j •••/ ■ 



\r7f-^^^.J(- ^^^^ 244. OXALIS COENICULATA, Him. 



Area 1 (2 3*5****i(t^*13* 15). 



South limit in Cornvpall. 



North limit in Devon. 



Estimate of provinces 1. Estimate of counties 2. 



Latitude 50 — 51. Local type of distribution. 



Agrarian region. Inferagrarian zone. 



Descends to the coast level, in the Peninsula. 



Ascends ? (But little above the coast level). 



Range of mean annual temperature about 51. 



Denizen. Viatical. Is this species truly a native, or 

 simply a naturalized one ? it occurs in Cornwall, Devon, 

 Dorset, Isle of Wight, Sussex, Surrey, Gloucestershire, 

 Lanarkshire and Stirlingshire. To the two Scottish 

 counties it is allowed to have been introduced. There 

 can be little question that such was the case in Surrey ; as 

 Dr. Bromfield also intimates of the Isle of Wight locality. 

 Of the Sussex and Dorset localities suspicion may reason- 

 ably be entertained ; especially as we find Dr. Salter 

 placing it in the category of dubious natives, in his 

 'Botany of Poole.' Mr. Curnow reports it as found at 

 " Bologas," in Cornwall. (Phytol. i. 1144.). 



