MONOGRAPHIE DER GATTUNG EUPHRASIA. 369 



tenclinfr to exterminate rare species, may I say that the following 

 rule has been drawn up for the Moss Excliange Club: — "Great 

 care should be taken not to injure or exterminate any rare or local 

 species. If a plant only occurs sparingly, not more than one or two 

 specimens should be taken. Often a whole tuft (c'.r/. of SpJuiijnxuii) 

 is destroyed, whereas greater care might have obtained a specimen 

 and left the original tuft little the worse. Localities near towns or 

 where there is any danger of a rare species being exterminated 

 should not be too definitely published." One often sees ironical 

 remarks in Reports of Exchange Clubs on account of the small 

 number of specimens sent. It would be well also to caution 

 beginners against taking too many in the case of a rare species. 

 — C. H. Waddell. 



NOTICES OF BOOKS. 



Moiioi/raphie der (j-attumi Euphrasia. Von Dr. R. v. Wettstein. 

 4to, pp. 310, tt. xiv, 3 maps. Leipzig, Engelmann. 1S90. 

 Price 30 marks. 



In this very complete and excellent monograph Dr. R. v. Wett- 

 stein has given the history, nomenclature, physiology, and biology 

 of these closely-allied species in a most thorough and painstaking 

 manner. The descriptions of the eighty-seven species are very 

 clear, and the difificiilty of diagnosing the critical forms is much 

 lessened by the clavis, and by the excellent drawings of the calyx, 

 flowers, &c., which are to be found on the clearly-engraved plates. 

 Eleven of the species are stated to be found in Britain ; they are as 

 follows : — - 



E. sTEicTA Host, Flora Anstr. ii. 185, which is figured as E. 

 olficinaUs in Hayne, Arzn. ix. t. 8. It is the E. nemorosa Reichb. 

 Ft. Exc. 358 (not of Persoon), the E. oJficinaUs var. nemorosa 

 Koch, Syn. Fl. Germ. 545, and the E. officinalis var. vnhjaris 

 Benth. in DC. Prod. x. 552. Of this species Dr. Wettstein has 

 seen specimens from the Surrey Downs. 



E. BORE.\Lis (Townsend, as a var. of E. Rostkoviana) Wettstein, 

 which was described as British by Mr. F. Townsend from Braemar 

 specimens, and is recorded from the Faroe Islands by Dr. Wettstein. 

 The writer has gathered it in Argyll, Ross W. and E., Easterness, 

 Westerness, Perth, and Sutherland ; and at Kenmare and Port- 

 marnock in Ireland. 



E. BREviFOLiA Bumat et Gremli ; Towns, in Journ. Bot. 1884, 

 167. This is, according to Dr. Wettstein, the E. ojficinalis var. 

 moiitava Fries, Stonma Ve;/. Scand. i. 19. Mr. Townsend sent Dr. 

 Wettstein specimens of it from Buxton, from Foyers (Inverness- 

 shire), and from Argyll. Dr. Richter is stated to record it from 

 the "Drosachs" (the Trosachs in Perthshire). 



E. NEMOROSA Pers. Sijn. ii. 149. This is reported from " Horning- 

 ton " (Honington), Warwickshire, F. Townsend : Portland, Groves; 

 Wokingham (Berkshire), and York. It is a frequent form in Berk- 



