052 



Lister a Nidus- avis. Penyard Park and Chase Woods : rare. 



Lemna gihha. Pools : flowering and fruiting abundantly in a still 

 pool, July and August, 1846, but not in a slow stream, where it 

 abounds. 



polyrhiza. Pool near the town. 



Festuca elatior. Between Huntsholm and Symons's Yatt. 



Brachypodium sylvaticum. Hedges : not common. 



Carex muricata. Banks. 



divulsa. Banks. 



vulpina. Ditches. 



Jlava. Marshes. 



recurva. Covering some acres of ground in Ailmarsh, 



sometimes flowering early in the year, when the fertile spikes are al- 

 most sessile, and the whole plant dwarf ; also on sunny banks in a 

 loamy soil. 



prdecox. Hedge-banks. 



ampullacea. Ailmarsh. 



Arum maculaium. Under trees in lanes, &c. 



Polypodium Dryopteris. Coldwell rocks ; also in shady parts of 

 Penyard, where its habit is very delicate, and little fruit produced : 

 the frond of a slightly glaucous hue. 



Grammitis Ceterach. Very sparingly. 



Asplenium Adian tum-n igrum . 



Scolopendrium vulgare. 



Opliioglossum vulgatum. Sparingly on Howie Hill ; plentiful in 

 some fields near Upton Bishop. 



W. H. PUKCHAS. 



Ross, Herefordshire, 

 September 11, 1846. 



Effects of Agitation and Rest upon Plants submerged in Water. 

 Communicated by Mr. Ward to the Linnean Society. 



" Mr. Ward exhibited specimens of the the extreme states of 

 Chondrus crispus {Lingb.), gathered by him at Linmouth, N. Devon, 

 growing within a few feet of each other, but under different condi- 

 tions ; the broad variety being found in pools among the rocks, where 

 it is always submersed, the narrow on the outer ledge of rocks, where 

 it is fully exposed to the action of the waves, which produce the same 



