Explanation of the Plates. 157 



Fig. 



91. Lateral view of flower of Ve,ronJka, Chamcsdrys L., x 3. 



92. Longitudinal section of the corolla of Veronica OhanuBd/rys 



L., X 3. 



93. Front view of flower of Veronica officinalis L., x 4. 



94. Longitudinal section of flower of Veronica officinalis L., x 4. 



95. Side view of the lower half of the OTary, of a stamen, and of 



the lower part of a segment of the perianth of Tulipa siU 

 vesbris L., x 2. 



96. Longitudinal section of flower of Lonicera al/pigena L., x 2. 



97. Longitudinal section of flower of Oenlranthus ruber (L.), x 4. 



98. Transverse section made across the middle of the corolla of 



Centranthus ruber (L.), x 12. 



99. Longitudinal section of flower of Horminum pyrenaicum L., 



x2. 



100. Transverse section of flower of Horminv/m pyrena/icvm, L. 



The section made just in front of the weel at the bottom of 

 the corolla, x 2^. 



101. Longitudinal section of flower of Phlox paniculata L., x 2. 



102. Longitudinal section of the lower part of flower of Phlox 



pamculata L., x 6. 



103. Longitudinal section of flower of Varnniwrn oxycoecos L., x 3. 



104. Transverse section of the whorl of stiff filaments of Vaccinium 



oxycoecos L., with their edges beset with trichomes, x 3. 



105. Transverse section of the corolla of Malva rotundifolia L. ; 



the section is made near the base of the corolla, x 6. 



106. Longitudinal section of lower part of flower of Vinca herbacea 



W. K., X 4. The tips of the petals cut off. 



107. Style of flower of Vinca herbacea W. K., x 4. 



108. Stamen of Vinca herbacea W. K., seen from the side turned 



towards the style. 



109. Longitudinal section of flower of Haplophyllum patamnvm, 



L., X 4. 



110. Longitudinal section of flower of Arctostaphylos mi;* ursi 



(L.),x6. 



111. Longitudinal section of flower of Ci/rsiwm spinosissimum L., 



x2. 



