374 OBSERVATIONS ON THE PERIOD OF 



dernesses in whicli these plants present themselves. For this however 

 patience and practice are necessary. The period is not far off when 

 these plants may be cultivated in European gardens with success, if they 

 are once imported and strong plants of Cissus are raised on which the 

 grafting is to be made afterwards. These plants must be raised in large 

 square or oblong frames, that the roots wdiich are to serve as bases 

 for the Rajflesice may spread strong enough. 

 they be imported. 



In the same manner must 



Report of a Committee appointed to investigate the best method of Making 

 and Eeco7'ding Observatiotis on the period of Leafing, Flowering, 

 and Fruiting of Plants, held during the Meeting of the German As- 

 sociation of Naturalists, at Vienna^ on the 19/7/ of September, 1856. 



In consequence of a proposal made in the meeting of the Botanical 

 Section on the ISth of September, the following gentlemen assembled 

 in the hall of the Botanical Section, to discuss their views respecting 

 phsenological observations, and to agree upon a uniform plan, by which 

 these might hereafter be simultaneously carried on: — Dr. Ferd. Cohn, 

 of Breslau; Dr. Karl Fritsch, of Vienna; Dr. A. E. Fiirnrohr, of 

 Eegenshurg; E. Hampe, of Blankenbnrg ; F. Hazslinszky, of Bperies; 

 Professor Oswald Heer, of Zurich; L. von Heufler, of Vienna; Herra. 

 Hoffmann, of Giessen ; Dr. A, Keruer, of Ofen ; Dr. A. Pokoray, of 

 Vienna ; Dr. Ph. L. Eabenhorst, of Dresden ; Dr. Siegfried Eeissek, of 

 Vienna ; Dr. Adalbert Schnitzlein, of Erlangen ; and Dr. Otto Sendt- 



, of Munich. 



Professor Karl Nageli, of Ziirich, was chosen president of this Meet- 

 ing; and Professor Hoffmann opened the proceedings by giving his 

 ideas on the phsenological observations which have hitherto been made. 

 These presented no uniformity, either in their methods or in their ob- 

 jects ; which is the more to be regretted, since the number of observers 

 is daily increasing. The object usually sought is to re-establish some 

 relation between climates and the period of flowering, — an attempt which, 

 in the present state of our knowledge, is premature. A further reason 

 why all such attempts have hitherto led to no results, lies in the want 

 of uniformity amongst the observations, and in too many plants being 

 made the subjects of observation. Professor Hoffmann suggested 

 therefore that a samllcr number of plants should be selected, and such 



