Xll ILLUSTRATIONS. 



FIG. 



105. Tufted Bog-sedge. 



106. Spikelet of Brome ftraas. 



107. rioret of Melio-grass. 



108. Spitelet of Meadow Soft Grass, 



109. Hairs from Plant Surfaces magnified. 



110. Plant Skin or Cuticle magnified. 



111. Frond of common Polypody. 



112. Portion of !Frond of Polypody with Sori or collections of 



Spores. 



113. Portion of Frond of Hart's-tongue Fern, with Sori. 



114. Fronds of Asplenium riride, or Green Spleenwort. 



115. Horse-tail, or Equisetum, Fertile Spike. 



116. Moonwort, 



117. Spore Case, or Capsule with Elastic King. 



