572 Mr. Hassall on the Structure of the Pollen Granule. 



Fig. 87. Pollen granule of Calystegia arvensis. 



88. of Ipomaea Sellowii. 



89. of Nolana paradoxa. 



90. of Cyclamen autumnale. 



91. of Rhododendron maximum, showing its structure 



and the mode of cohesion of the granules. 



92. Pollen granule of Mirabilis Jalapa. 



93. of Banksia speciosa. 



94. 95. of Lambertia formosa; 94, front and 95, side views. 



96. Pollen granule of Grevillea linearis. 



97, 98. Pollen granule of Anadenia Manglesii ; 97, front and 98, side 

 views. 



99. Pollen granule of Juglans regia. 



100. of Urtica dioica. 



102. of Sedum glaucum. 



103. of Bauera rubioides. 



104. of Mimosa Mexicana. 



105. ■ of Acacia rigens. 



106. of Acacia decipiens. 



107. of Acacia linearis. 



108. of Colutea arborescens in its dry state. 



109. of Erythrina laurifolia, showing its 3 membranes. 



110. 111. Pollen granule of Limnanthus Douglassii ; 110, in its pri- 

 mary ; 111, in its secondary condition. 



Plate XVII. 

 Fig. 112. Pollen granule of Impatiens noli me tangere. 



113. of Geranium sylvaticum. 



114. ■ of Dianthus caryophyllus. 



115. of Calandrinia discolor. 



116. of Malpighia punicea. 



1 1 7. of Zizyphus Paliurus. 



118. of Citrus Aurantium as it appears upon the stigma : 



in its dry state it is of an elongated form and four-lobed. 



119. Pollen granule of Tilia europaea. Three membranes only should 

 have been represented in the figure instead of four. 



120. Pollen granule of Lavatera acerifolia. 



121. ■ — of Anbutilon striatum. 



122. of Linum usitatissimum. 



123. 124, 125. Pollen granule of Polygala grandiflora ; 123, in its pri- 

 mary; and 124, 125, in its secondary forms. 



126. Pollen granule of Hypericum hircinum. 



127. of Passiflora caerulea. 



128. 129. Pollen granule of Viola tricolor; 128, in its primary; 129, in 

 its secondary form. 



130, 132. Pollen granule of Viola montana in its dry and moist condi- 

 tions. 



131, 133. Pollen granule of Brassica oleracea ; 131, in its primary; 

 133, in its secondary form. 



134. Pollen granule of Momordica Elaterium in its primary form. 



135. of Calothamnus villosus. 



136. of Angophora cordata. 



1 ^7. of Tristania neriifolia. 



Plate XVIII. 



Fig. 138. Shows the mode of union and structure of the pollen granules of 

 Epilobium roseum. 



