328 ADDITIONAL SPECIES, ETC. 



may now fall back to the state of matters in this genus, 

 prior to the remoclelling attempts of that botanist; in 

 other words, to the two apparent species, C. semidecan- 

 drum and C. tetrandrum, plus the very dubious C. ]3umi- 

 lum of Curtis. But as nobody knows what the last name 

 intends, we may discard the C. pumilum as virtually a 

 non-entity, equally with C. pedunculatum and C. atrovi- 

 rens. For the present species, C. semidecandrum, I am 

 unable to cite any locality in the West or North High- 

 lands; and its area is therefore carried northward of 

 Moray on the authority of the Shetland Flora only. (See 

 vol. i. page 228.) 



194*. CeRASTIUM TETRANDRUM, Curt. 



Cerastium atrovirens, Bab. 

 Cerastium pedunculatum, Bab. 



Area 1 2 3 4 5 G 7 8 9 10 11 12 * 14 15 16 * 18. 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Shetland, Orkney, Hebrides. 



Estimate of provinces 18. Estimate of counties 80. 



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 East Lowlands. 



Range of mean annual temperature 52 — 45. 



Native. Glareal, Rupestral. The remarks made under 

 the preceding species, C. semidecandrum, will explain this 

 second notice of the jpresent species, and sufficiently justify 

 the union of the above three names as representing a sin- 

 gle species. I am yet by no means satisfied that C. semi- 

 decandrum and C. tetrandum are permanently distinct; 



