RULES 



OF 



Saridberg's Betariical ta^arige Bareaa. 



1. Well prepared and identified specimens of Phsnogams, Vascular, 

 Cryptogams, Mosses and Fungi will be accepted for distribution. 



2. Fruit, flowers and leaves should befurnished whenever practicable. 

 Roots and root leaves must be furnished when characteristic. Both sexes 

 of dioecious species must be furnished. The entire plant of all herbaceous 

 species less than two feet high should be sent folded to within the size of 

 the standard herbarium sheet (n ,'4xi6}i). Specimens must be well 

 pressed and of good color. 



3. As early as Dec. i, of each year, correspondents should send in 

 lists of specimens which they may desire to exchange. These lists may 

 be by number or by name, strictly in the order of Patterson's catalogue, 

 and should indicate the number that can be furnished of each species. 



4. Requisitions will be based by the Bureau upon these lists, and must 

 be filled promptly. 



5. In sending in specimens single sheets of plain light manilla paper, 

 varying not more than one inch either way from 11x16, must be used. One 

 complete specimen with its label giving name, locality, date, and name of 

 collector must be placed on each sheet, those of the same species being 

 Contiguous, and all arranged in order of Patterson's catalogue. 



6. Material enough to cover at least 30 square inches should be sent 

 with each label. This means several individuals of small plants, and more 

 than a twig of larger ones, 



7. All costs of carriage must be defrayed by correspondents, which, 

 however, this system will reduce to a minimum. 



8. Upon receipt of a package of specimens, they will be at once in- 

 spected. Any discolored, badly wrinkled or defective specimens will be 

 rejected. Scanty specimens will be condensed by doubling them up. From 

 the number of good specimens thus determined one-fifth will be deducted 

 as compensation for the Bureau. Four-fifths, or 80 per cent., of the speci- 

 mens found satisfactory will be placed to the credit of the correspondent. 



g. No fee will be exacted nor charge made for correspondence. 



10. When desired the Bureau will advise what plants should be collected 

 and correspondence to this effect will be welcome. 



11. An annual list of duplicates ready for distribution will be mailed to 

 correspondents not later than February 1. Requisitions will receive prompt 

 attention. • 



12. Desiderata can be had at the rate of §7.00 per hundred. 



13. So far as applicable the same rules will govern cryptogamous plants. 

 All specimens and correspondence should be addressed to 



SANDBERG'S BOTANICAL EXCHANGE BUREAU, 

 501 Central Ave. MINNEAPOLIS, MINN. 



