Explanation of the Plates. 153 



Fia. 



15. A single stamen from flower of AtrOfgme alpina L., showing 



the grooTe in the basal part of the filament in which nectar 

 is secreted, x 2. 



16. Several stamens of Atragene al/pina L., standing one behind 



the other, and covering each other, x 2. 



17. Lateral view of capitulum of Gentav/rea pseudophrygea 0. A. 



Meyer. Natural size. 



18. End of style of Monotropa hypopitys L., Wallr,, seen from 



above, x 2^. 



19. Longitudinal section of the anterior part of flower of Mono- 



tropa hypopitys L,, x 2^. 



20. Lateral view of capitulum of Oarlina vulgaris L. The 



marginal flowers are in the position they assume at night, 

 with their apices bent over towards each other. Natural 

 size. 



21. Longitudinal section of flower of Ranunculus glacialis L., 



xli 



22. A single petal of Brniu/nculus glacialis L., seen from above, 



xli 



23. Longitudinal section of a single petal of Ranunculus glacialis 



L.,xli 



24. Longitudinal section of flower of Epi/mediwm alpinum L., 



the peduncle covered with glandular trichomes, x 2. 



25. Lateral view of flower of Bibes grossularia L., natural size. 



26. Part of flower of Guphea micropetala H. B. K., x 6, slit open. 



On the calyx-tube are inserted two lanceolate petals, and 

 above each of these is a knob-shaped epiblasteme with 

 bristly processes that secrete a viscid substance. 



27. Lateral view of flower of Guphea r/vioropetala H.B.K., x 2. 



28. Longitudinal section of flower of Guphea micropetala H.B.K., 



x2. 



29. Transverse section of flower of Guphea micropetala H.B.K. 



The section is made across the triangular style and close 

 above the ovary, x 3. 



30. Longitudinal section of flower of Monotropa glabra Bernh., 



x2i 



M 



