PLATE 32. Pollen, etc. 



Figure 



1 . a and b, spiral tissue of lining of anther from wallflower (Cheiranthus Cheiri). 



2. Ditto, from London Pride (Saxifraga umbrosa). 



3. Ditto, from Lupinus nanus. 



4. Ditto, from a cactus (Cereus speciosus). a, side view; b, from above. 



5. Ditto, from daisy (Bellis perennis) . 



6. Pollen of Viola odorata. a, side view ; b, end view ; c, in water. 



7. Pollen of Apocynum Fenetum. 



8. Pollen of daisy (Bellis perennis). 



9. Pollen of Mesembryanthemum. 



10. Pollen of Alisma plantago. 



1 1 . Pollen of Lupinus nanus. 



12. Pollen of garden geranium (Pelargonium speciosum). a, front view ; b, side 



view. 



13. Pollen of passion-flower (Passiflora ccerulea). a, perfect grain ; b, grain with 



the lid of a pore opening. 



14. Pollen of Epilobium montanum. 



15. Pollen of Periploca graeca. 



16. Pollen of Scorzonera hispanica. 



1 7. Pollen of Erica multiflora. 



18. Pollen of Sherardia arvensis. a, side view ; b, end view ; c, ditto in water. 



19. Pollen ofSasella alba. 



20. Pollen ofPassiflora aguilegiaefolia. a, side view ; b, end view ; e, ditto in water. 



21. Pollen of Impatiens noli me-tang ere. 



22. Pollen of Cucurbita Pepo, in water. 



23. Pollen of Ruellia formosa. 



24. Pollen of musk-plant (Mimulus moschatus). 



25. Compound pollen of Acacia laxa. 



26. Pollen of Hibiscus Trionum. 



27. Pollen of chicory (Cichorium Intybus). 



28. Pollen of Sonchus palustris, side and end views. 



29. Pollen of Statice linifolia, end and side view. 



30. Pollen-grain with tube upon the stigmatic papillae, from Lathraa squamaria. 



31. Spermatozoid from the globule of Charaf raff His. 



32. Spermatozoids from the antheridium of Marchantia polymorpha. 



33. Spermatozoids from the antheridium of Polytrichum commune. 



34. Spermatozoids from the antheridium of a Fern (Gymnogramma). 



35. Spiral fibrous cells of the sporange of Marchantia polymorpha. 



36. Elater of Marchantia polymorpha. 



37. Fragments of ditto. , from the middle; 5, one end. 



38. Elater of Frullania dilatata. 



39. Elaters (a) and spores (b) of Trichia. 



40. Fragment of the same elater showing the three internal spiral fibres. 



