280 llEPOET OF THE BOTANICAL EXCHANGE CLUB. 



I observed the same plant on the Lacli Eye ^Meadows, near Cheater. 

 Should, therefore, Dr. 15. think the plant worth a provisional name, 1 

 should propose Callitriche Lachii." — J. L. Wauuex. A very puzzling 

 form, intermediate between C. obtmanfiula and C. stagnaUs, having 

 the lobes of the fruit rounded as in obtmangula and the styles long as 

 in C. stagnalis. I can see no resemblance to C. hanmJata, for the 

 bracts are persistent and the fruit large and not broader than long. The 

 lower leaves of C. obfusanf/ula, growing in deep water, are often linear, 

 notably so in specimens collected by Mr. Duthie near Deal. They 

 are also linear in C. stagnalis when it grows in deep water. The 

 latter plant commonly grows on mud, in which case the leaves are all 

 epathulate or obovate, but the same plants, should the water rise and 

 cover them to the depth of a foot or so, have the lower leaves linear 

 The converse of this takes place in C. hainulata, for when it grows on 

 mud the leaves are all linear without a terminal rosette of obovate 

 leaves. In this state the fruit is stalked, but when the water rises 

 over it a terminal apical rosette of obovate leaves is developed, and 

 only sessile or subsessile fruit is produced. — J. T. Eoswell. 



Valerianella eriooarpa, Desv. "Hedgebank by a cornfield, Rarae, 

 E. Cornwall, August, 1875." Some dozens of specimens grew last 

 summer on a dry hedgebauk, or old wall of stones and earth, bounding 

 a cornfield at Rame, very near the coast and fully exposed to the 

 breezes from the Channel. The spot is about five miles from Plymouth, 

 as the crow flies, in a south-westerly direction. There were also a 

 few examples in the field below, either among a crop of barley or 

 in a weedy strip of ground between the corn and the hedgebank. On the 

 latter the plant extended for two or three yards only, growing princi- 

 pally in one or two large patches. — T. 11. A. B. It is the ordinary 

 form. — J. T. BoswELL. 



Cardims tenuijhrus, Curt., var. pycnocephalus, Jacq. " In waste 

 rocky spots on limestone under the Hoe, Plymouth, S. Devon ; where 

 ordinary tenuijlorus also occurs, July, 1875." M. Deseglise, to whom 

 I sent a specimen, regards this as the true 2^1/onocephaJus, for which it 

 was recorded by Mr. Keys. It looks considerably difierent from our 

 ordinary tenuijlorus. — T. R. A. B. This looks much like true 

 pycnocephalus, but has the spines of the leaves much stronger than in 

 any of my Continental specimens of that plant. I should like much 

 to see the lower leaves of the Plymouth ^^ pycnocepihalus.''^ — J. T. 



BOSWELL. 



Arctium nemoroaum, Lej. " Field hedge, "Welwyn, Herts, August, 

 1875. This occurs in several places around Welwyn, by field sides or 

 in bushy places. It is a large (5 feet high) handsome plant, and is very 

 strikingly different in habit to any other Arctium. The heads are 

 large, almost or quite sessile, and much contracted at the mouth in 

 fruit. I noticed it in E. Kent last autumn." — T. B. Blow. Prof. 

 Babington has favoured mc with the following remarks on this plant : 

 " I think that Mr. Blow's plant may be correctly named, but should 

 like to have seen a root-leaf. These pieces may have been branches, 

 and therefore of no value for inflorescence. Nevertheless, they are so 

 like my specimens that 1 consider the name correct." — T. E. A. B. 



Senecio vulgaris, Linn., var. ; probably hihernica, Boswell, in 

 Report B. E. C, 1872-74, p. 27. " Tregantle, E. Cornwall, April 17, 



