R XJ L B 8 . 



1. The objects of the Watson Botanical Exchange Club are 

 to promote more intercourse between British botanists, and to 

 study, as much as possible, British plants belonging to critical 

 genera. 



2. The subscription is 5s. a year, and is due on Jan. ist. 



3. a. Members may send to the Distributor for the time being, ' 

 before January 31st., each year, parcels of plants for distribution, 

 and they will receive in return plants in proportion to the num- 

 ber and quality of those sent. 



h. Each plant must bear a label giving the name, place 

 where collected, collector's name, and date. To prevent possible 

 confusion, it would be better, in the case of Roses, Salices, etc., 

 to affix the label to the plant. 



c. Several specimens of each plant should be sent, and 

 they should be good specimens. Scraps are not of the slightest use. 



d. No plants must be sent which are not included in the 

 List of Desiderata for the current year. 



e. Each member must let the Distributor have a London 

 Catalogue of British Plants with a mark against his desiderata. 

 These Catalogues should accompany the parcels. They will be 

 returned in the return parcels. No MS. lists to be sent. 



f. The plants in the parcels should be arranged in the 

 order in which they are printed in the 8th ed. of the London 

 Catalogue. Specimens of the same species should be put on 

 separate sheets in one cover, with the name of the genus and 

 species, and its number in the London Catalogue, written on 

 the outside of the cover. These covers should all be of an 

 uniform size. 



4. Members will very much increase the scope and work of the 

 club if they will send for examination any Batrachian Ranunculi, 

 Rosse, Rubi, Callitriches, Hieracia, Menthas, Potamogetons, 

 Salices, Junci, Carices, Charas, &c., — the study of critical species 

 being one of the principal aims of the club. One specimen of 

 each will be returned to the owner after examination. 



In the case of Hieracia the colour of the styles should 

 always be stated on the label. 



The following quotation from Prof. Babington's " British 

 Rubi," will show what a perfectly diagnosable specimen of a 

 fruticose Rubus should consist of: — '*To judge properly of a 

 bramble from a preserved specimen we require a piece of the 

 middle of the stem with more than one leaf; the base and tip 

 of the stem are also desirable. Likewise a piece of the old stem 

 with the flowering shoot attached to it ; the panicle with flowers, 

 and the fruit. We likewise want to know the direction of the 

 stem throughout, of the leaflets, and of the calyx ; also the shape 

 of the petals and the colour of the styles ; a note of these should 

 be made when the specimen is gathered." 



