1858.] THE CLENT HILLS. 397 



as an example of the genus and even of this section of the Order. 

 The Hawkweeds are not abundant about Clent. In limestone 

 tracts there are numerous examples of distinct species, and many 

 individuals of each ; but here they are comparatively few, both in 

 the number of species and of individuals. We were only able to 

 identify Hieracium boreale, H. vulgatum, and that one common 

 everywhere, H. Piloselia, the common Mouse-ear. 



This latter grew abundantly on the Clent Hills, and kept in 

 flower to a much later period of the season than it does in any 

 other locality where we have seen it grow. 



One plant of this Order Compositce, viz. the common Tansy, 

 we noticed in a much more elevated position than that which it 

 commonly occupies. In the south of England it is usually con- 

 fined to riversides, on dry places indeed, but seldom far from 

 streams. Here it was growing luxuriantly on the very summit 

 of the Clent Hills. Good King Henry was also gathered nearly 

 at the same elevation. This plant is mostly found near farm- 

 steadings, in grassy lanes, where the soil is highly nitrogenized. 

 In the ' Cybele' the range of this plant is from 100 to 200 yards. 

 The latter number may be safely raised to 300. 



In the fields on these hills — for in parts they are cultivated — 

 the common Charlock {Sinapis arvensis) was of course common 

 among turnips and potatoes. But this was accompanied here 

 by a much scarcer plant, and one which we believe has never 

 been recorded as growing at so considerable an elevation : we 

 mean Treacle Mustard [Erysimum cheiranthoides) . This was 

 only slightly less abundant on the upland cultivated fields of 

 Clent than the common Charlock is everywhere. Its upper ver- 

 tical limit may be stated at from 250 to 300 yards, instead of 

 100. The wild Radish [Raphanus Raphanistrum) was plentiful 

 in similar localities. So was the Pennycress [Thlaspi arvense), 

 a plant of very local occurrence, though it has a very consider- 

 able horizontal range, being found in every county of our island, 

 from Kent to Caithness. Notwithstanding this its wide distri- 

 bution, it is one of the rariores — scarce plants of our island; as 

 such, its occurrence is always registered by every botanist. 



Senecio sylvaticus, one of the Ragweeds, was also a very 

 abundant plant all round the fields, both on the hedge-banks, 

 and about the margins. 



When we mention the Fumitories [Furnaria officinalis and 



