154 Explanation of the Plates. 



Fia. 



31. Longitudinal section of the upper end of the style of Mono- 



tropa glabra Bernh., x 4. The epiderm, which discharges 

 viscid matter, is represented by the dark line. 



32. Lateral -view of flower of Plvmbago ewroptea L., x 34. The 



calyx is covered with 10 rows of very viscid glandular 

 trichomes. 



33. Flower of BUppocrepis eomosa L., robbed of its standard; 



seen from above, x 3^. 



34. Longitudinal section of flower of Pentastemon gmtianoides 



(H. B.) X li 



35. Transverse section of flower oi Pentastemon gentianoides (H. B.) 



The section is made near the base of the flower, across the 

 axis of the ovary. 



36. Lateral view of the stigma of Oenticma hava/rica L., x 3. 



37. Flower of Gentiana bama/rica L., seen fcpm above, x Ij. 



38. Longitudinal section of the nectar-cavity of flower of 



Amaryllis belladonna L. ; natural size. 



39. Transverse section of flower of Amaryllis belladonna L. 



The section is made across the filaments and the style, just 

 in front of the entrance to the nectar-cavity. Natural 

 size. 



40. Flower of Al/ysswn cah/m/nMrn L., seen from above, x 4. 



Plate IL 



41. Lateral view of flower of Linaria aVpina (L.), x 2^. 



42. A segment of the perianth of lAliwm mxjHagon L., x \\. 



43. Transverse section of a segment of the perianth of lAlivm 



mwrtagon L., x 3. 



44. Lateral view of a petal of AconAtvmipa/nicvlatwm Lam., x 14. 



45. Longitudinal section of flower of Trieyrles pilosa Wallich, 



x2. 



46. Longitudinal section of flower of Androsace glacialis Hoppe, 



x4. 



47. Longitudinal section of flower of Nigritella angvMfolia 



Rich., X 6. The tips of the perianth-lobes are cut oflf. 



