90 THE FIFTY YEARS LIMIT IN NOMENCLATURE. 



n. Babinrftonii Bell-Salt. Normandy: Border of Moulineux 

 Forest. A weak form, thus named by Dr. Focke. 



Pi. vosaceus Wh. & N. (sp. coll.). Brittany : Near Dinan; a form 

 near the British var. infecundas Rogers. 



li. Questierii X rusticanus. Normandy : Near Coutances. 



Ros^. 



Fiosa pwrpineUifoIia L. Guernsey : Grande Havre. Sark, 

 Jersey : Frequent along the coast. 



B. ruhiijinosa L. Guernsey: Perrelle Bay. Ssivk, ^L'. Derrick I 

 Jersey : Gorey. Perhaps doubtfully native. 



B. viicrantha Sm. Sark. Jersey : Pont Marquet. 



B. caniua L. Generally but thinly distributed in Guernsey and 

 Jersey. No form seen but var. diunalis Bechst. Sark, Mr. Derrickl 

 Brittany: Dinan neighbourhood; vars. lutetiana and dumalia, the 

 latter in great quantity. Normandy : Var. lutetiana, La Bouille ; 

 var. dumdlis, generally distributed. 



B. stylosa Desv. var. si/stijla (Bast.). Sark: Dixcart Bay, several 

 fine bushes. Apparently not before recorded from the islands. 

 Brittany : Near Dinan. 



Other roses seen in Normandy are — 



B. tomentosa Sm. var. scabriuscuhi (Sm.), or form near it. 

 Moulineux. 



B. ohtusifolia Desv. La Bouille. 



B. arvensis Huds. Moulineux. 



THE FIFTY YEARS' LIMIT IN NOMENCLATURE. 

 By the Editor. 



In the List number of the Botanisches Jahrhucli (xxiv. heft 4, pp. 

 492-502 (8 Feb. 1898) ) Prof. Engler has put into practice the rules 

 for nomenclature to which he and his assistants last year subscribed 

 their names."'' We had hoped that, considering the manifest diffi- 

 culties in interpreting at least one of these rules, they would not be 

 adopted until some opportunity had been given for their discussion. 



It is obvious that if Prof. Eugler's example were generally 

 followed, the confusion which at present prevails in botanical 

 nomenclature would be increased to an indefinite extent. What 

 our transatlantic friends call "the Rochester Code" was drawn up 

 by a committee of seven botanists from various centres, and sub- 

 mitted to a more or less representative gathering of American 

 botanists before their adoption and promulgation. The Berlin 

 rules have not even received the adhesion of all the botanists 

 of that city; they are put forward by Prof. Engler and his 

 assistants on their sole authority. There is nothing to prevent 

 any other botanical centre from promulgating a series of rules of its 



Notizblatt des Konigl. hot. Gart. Berlin, 1897, 248. 



