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anthers of another flower, those which are attached to the flower 

 spring open ; the loose ones don't. If only the corolla with the 

 stamens attached to it is placed in the moist space, the anthers open 

 as well as those of the complete flower. Consequently the nectary 

 which is found in the middle of the flower at the side of the ovary, 

 exerts no direct influence on the bursting of the anthers. If further 

 a stamen is prepared in its full length and placed in the moist space 

 together with some loose anthers, the anthers of the stamen burst, 

 whereas the loose anthers remain closed. 



From these experiments we infer that the anthers open under the 

 influence of the stamen whether or not connected with the corolla. 

 Now an investigation with Fehling's solution shows that as well 

 the stamen as the whole corolla and even the corollar slips, show 

 the well-known reaction, indicating glucose. 



Of Digitalis purpui'ea two of the anthers of a flower in the moist 

 chamber, were separated from the corolla by an incision. The uncut 

 anthers burst open, but the other two remained closed. A stamen 

 prepared free over its full length causes the anther to burst in 

 the moist chamber ; loose anthers, on the other hand, remain closed. 



An investigation with Fehling's solution showed that here also the 

 corolla contains glucose everywhere, but in especially large quan- 

 tities where the stamens have coalesced with the corolla. Also the 

 stamens are particularly rich in sugar over their entire length. 



Of Oenothera LamarcJciana, the anthers of which burst already in 

 the bud, a flower-bud was deprived of sepals and petals. One of the 

 stamens was taken away from the flower in full length ; of another 

 stamen only the anther was removed. These three objects were placed 

 together in the moist chamber. The anthers of the stamens which 

 had remained connected with the tube of the calyx and those of the 

 loose stamen sprang open; the loose anther, however, remained 

 closed. An examination with Fehling's solution gave the same result 

 as was found above with Digitalis. 



Similar experiments were made with the flowers of Antirrhimwi 

 majus L., Lamium album L., Glechoma hederacea L., Salvia argentea 

 L., Nicotiana affinis Hort. and sylvestris Comes., and Symphytum 

 officinale L., which all gave the same results, while with the flowers 

 of Ajuga reptans L., Stachys sylvatica L., Scrophularia nodosa L., 

 Cynoglossum officinale L., Anchusa officinalis L., Echiumvidgareli., 

 Calceolaria pinnata, Hibiscus esculentus, Anoda lavateroides, Malva 

 vulgaris Tr., Torenia asiatica, Corydalis luteaDc, Colchicum autum- 

 nale L., LysimacJiia vulgaris L., Atropa Belladona L. and lïhinanthus 

 major Ehrh. the experiments were restricted to showing that with 



