122 4. CRUCIFER.E. 



Estimate of provinces 16. Estimate of counties 50. 



Latitude 50 — 58. British type of distribution. 



Agrarian region. Inferagi-arian — Superagi-arian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to, probably, 300 yards, in North Wales. 



Range of mean annual temperature 52 — 45. 



Native. Glareal and Rupestral. The Teesdalia has usu- 

 ally been classed among the ' rarer plants ;' and yet the 

 distribution, as above set forth, shows an area and range 

 much wider than given for many other species which have 

 been held among the ' commoner plants.' For instance, let 

 the distribution of this species and that of the Clematis be 

 compai'ed together, and it will be foiuid nearly double for 

 the present one ; yet in Tm-ner and Dillwyn's guide, the 

 Clematis was not included, while the Teesdalia was so. Its 

 comparatively spare and restricted distribution in Scotland, 

 over much of which it is yet unfound, gives something of 

 an English character thereto ; although it is stiU nearer to 

 the British (general) than to the Enghsh (southern) type 

 of distribution. 



66. Iberis amara, Linn. 



Area (1) * 3 4 * ^iliU (10 11 12 13 14). '^ ^'^ //}./. Jff/. 



South limit in Berks, Bucks, Essex. 



North limit in Norfolk, Bedfordshire, Oxfordshire. 



Estimate of provinces 2. Estimate of counties 6. 



Latitude 51 — 53. Germanic type of distribution. 



Agrarian region. Inferagiarian zone. 



Descends to (or near) the coast level. 



Ascends to 50 or 100 yards, in England. 



Range of mean annual temperatm-e, say 49 — 48. 



Colonist. Agrestal. According to pubHshed reports of 



