1861.] NORTHUMBRIAM BOTANY. 99 



D. glabrescens. The Hypericums do not flower till at least a 

 month after the others. Myosotis collina grew on a wall on the 

 east side of the plantation, but as the wall has been pulled down 

 and rebuilt, that locality is destroyed for the present. 



Two interesting Ferns are also to be had in May, viz. Ophio- 

 gJossuni vulgatum, and Botinjch'mm Lunaria : they grow in a pas- 

 ture on the south-west side, in front of a large quarry. The 

 Moonwort is near a well in the field, and the Adder' s-tougue 

 about halfway between it and the plantation. 



Erica cinerea grows on the banks beside the quarry, and 

 Hieracium boreale, Stachijs Betonica, and Teucrium Scorodonia, 

 bloom there in July. The botany of the crags is at least more 

 varied in midsummer, although it then does not produce rarer 

 plants. I will commence at the south-western end, and notice 

 the plants as I proceed. The limestone before mentioned affords 

 a few plants of Scabiosa Columbaria and Sedum acre. In front 

 of it are Vicia sativa and V. hirsuta, and just below them, two 

 or three patches of Geranium sanguineum. G. lucidum grows on 

 several parts of the wall that encloses the plantation. Beside 

 these, and on the rocks lying northward, are Arabis hirsuta, 

 Pimpinella Saxifraga, Poterium Sanguisorba, Helianthemum vul- 

 gare, and Thyinus Serpyllum. Euonymus europtsus clings to the 

 face of the rocks, and on a ledge about halfway down, there is 

 one large plant of Astragalus Glycyphyllos. Hieracium vulgatum 

 grows all along the front of the cliffs. Proceeding to the north- 

 ward, we will find Arenaria serpylUfolia growing on the rocky 

 ledge. I noticed a few plants of Sagina subidata growing in the 

 midst of the Arenaria. Arenaria trinervis is plentiful at the 

 foot of the precipice. Leaving these, as we go along, a few 

 rather scarce Grasses may be picked up, such as Avena pratensis, 

 Koeleria ci'istata, Bromus sterilis, Festuca bromoides, and others. 



Allium oleraceum is abundant as we proceed, and so is Rosa 

 spinosissima. About eighty yards from the observatory, Dianthus 

 deltoides and Cerastium arvense occur on a bare dry place, both 

 sparingly. 



There is a small but dense tuft of Astragalus hypoglottis a few 

 feet from the building. It flowers very late — September and 

 November. About sixty or seventy yards on the other side of 

 the observatory, a Thalictrum is growing on the ledge of the 

 rocks. I believe it is Thalictrum flexuosum, but it is so much 



