1144 



Trifolium ayrarium in Hertfordshire. 



" 1 may also take this opportunity of mentioning, that amongst a 

 collection of plants made in the neighbourhood of Hitchen, in the 

 years 1815, 1816, and 1817, is a specimen of T. agrarium, L. As it 

 has not been heard of since, and it is a plant too conspicuous to be 

 easily overlooked, it seems most probable that it has been only a 

 casual introduction ; although, from its continental distribution, this 

 species would seem not unlikely to occur in a wild state in this 

 country." — Id. 



Bifid and Trijid Ferns. 

 "The remarks of M. Piquet (Phytol. iv. 1135) tend to confirm a 

 belief 1 have some time held, that all ferns have a tendency to become 

 bifid, and in some instances multifid. Several of those named by 

 that gentleman I have gathered in this county, in a bifid state, and 

 Aspidium Filix-mas, Hooker, multifid. One specimen of Aspidium 

 angulare I possess very distinct, being divided as much as nine inches 

 down the frond. A friend recently received, from Hampshire, a frond 

 of the rare Asplenium fontanum, which is likewise bifid. Polypo- 

 dium vulgare assumes the most fantastic forms : I have a great num- 

 ber of varieties of this plant which, step by step, connect it with P. 

 Cambricum. Thus we see this tendency pervading many ferns, from 

 some of the commonest to one of the rarest ; and I doubt not others 

 might be discovered. Is this state permanent ? As far as Scolopen- 

 drium vulgare goes, I believe the multifid variety has been growing 

 in one habitat in this county for some years; thus giving a colour to 

 the belief that these forms may be permanent, if undisturbed. Two 

 spots where I have found the bifid variety of S. vulgare I intend to 

 examine again next year, to see if the forms are reproduced." — T. W. 

 Gissiny, Worcester, November 7, 1853. 



Udora Cajiadensis and Poiamoyeton trichoides in Norfolk. 



" 1 forward you a specimen of Udora, which I met with in a pond 

 at Swainsthorpe, Norfolk, on Sept. 20, 1853. With its history in 

 connexion with the pond I have no means of becoming acquainted. 

 The latter is about 170 paces in circumference, and its margin so 

 overgrown with bushes that I had difficulty in getting at the plant. 

 There is neither navigable river nor canal in its neighbourhood. 



'' Respecting Potamogeton trichoides, further search has led to the 

 discovery of a more extended distribution of it in Norlblk. Last 



