DESCRIPTION OF PLATES. XV 



FIG. 



116, 6. Spore, much magnified, with elastic filaments 



coiled closely round ...................... 55 



c. Spore expanded .......................... 55 



117, a. Fructification of Lycopodium club moss ...... 54 



b. Sporules .................... . .... ....... 54 



C. Sporules more highly magnified, 



PLATE V. to face page 56. 



118. Delicate spiral cells from anthers of furze 44 



119. Large well-developed spiral cells from anthers of 



hyacinth, with minute raphides in intercellular 



spaces 44 



120. Irregular deposit in cells of anthers of white dead- 



nettle 44 



121. Annular ducts from anthers of narcissus 44. 



122. Stellate cells from anthers of crown imperial .... 44 



123. Ovate pollen cells 44 



124. Triangular pollen cells from hazel 44 



125. Pollen cells of heath 44 



126. Pollen cells of dandelion 44 



127. Pollen cells of passion flower 45 



128. Pollen cells of mallow 45 



129. Eed poppy seed 46 



130. Black mustard seed 46 



131. Seed with deep and curved furrows 46 



132. Great snapdragon seed * 46 



133. Chickweed seed 41 



134. Umbelliferous seed or fruit 46 



135. Zygnema, conjugating 60- 



136. Clostenum, conjugating 57 



