165 



corolla and even the corollar slips, show the well-known 

 reaction, indicating glucose. 



Of Digitalis purpurea 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 cham- 

 ber; loose anthers, on the other hand, remain closed. 



An investigation with F e h 1 i n g ' s solution showed that 

 hère also the corolla contains glucose everywhere, but in 

 especially large quantities where the stamens hâve coales- 

 ced with the corolla. Also the stamens are particularly 

 rich in sugar over their entire length. 



Of Oenothera Lamarckiana, 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. Thèse 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 F e h 1 i n g ' s 

 solution gave the same resuit as was found above with 

 Digitalis. 



Similar experiments were made with the flowers of 

 Antirrhinum majus L., Lamium album L., Glechoma hede- 

 racea L., Salvia argentea L., '^icotiana affinis Hort. and 

 sylvest7is Comes., and Symphytum officinale L., which ail 

 gave the same results, while with the flowers of Ajuga 

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

 Cynoglossum officinale L., Anchusa officinalis L., Echium 

 vulgare L., Calceolaria pinnata, Hibiscus esculentus, Anoda 

 lavateroides, Malva vulgaris Tr., Torenia ' asiatica, Corydalis 

 lutea De, Colchicum autumnale L., Lysimachia vulgaris L., 

 Atropa Belladona L., and Rhinanthus major Ehrh. the 



