PLATE 28.— Hairs, Fibres, Glands, &c. of Plants. 



Figure 



1. Cotton, a, normal condition ; b, portion treated with sulphuric acid and iodine ; 



c, a fragment of gun-cotton ; d, transverse section of cotton-fibre. 



2. Flax, a, normal fibre ; b, portion boiled with nitric acid ; c, treated with nitric 



acid, and afterwards with sulphuric acid and iodine. 



3. Jute, a, normal fibre ; b, c, portions boiled with nitric acid. 



4. Coir (cocoa-nut fibre), bundle of fibres. 



5. Ditto, a, b, portions of fibres boiled with nitric acid. 



6. Hemp, a, normal fibre ; b, portions boiled with nitric acid. 



7. Manilla hemp, a, normal fibres ; 5, fragment boiled with nitric acid. 



8. Sting of Urtica wens. 



9. Surface of the cuticle of Helleborus foetidus. 



10. Ditto of CaJcile americana. 



11. Imbedded gland of Buta graveolens, vertical section. 



12. Glands of Magnolia, seen from above. 



13. Hair of Siphocampylus bicolor, the cuticle detached by sulphuric acid. 



14. Glands of hop. a, side view ; b, from above. 



15. Stellate body from the air-spaces in the leaf of Nuphar lutea. 



16. Hair of Delphinium pinnatifidum. 



17. Hair of Anchusa crispa. 



18. Hair of Pelargonium. 



19. Branched hair of Verbascu,m Tfiapsus. 



20. Scale-like hairs from the seed of Coboza scandens. 



21. Annulated hairs from the seed of Ruellia formosa, in Avater; b, detached cell-wall. 



22. Spiral-fibrous hairs from the seed of Collomia grandifl'ora, in water, b, c, frag- 



ments showing the cell-wall and free fibre. 



23. Hair from the seed of a Salvia. 



24. Hair from the seed of Acanthodium spicatum. b, a fragment of a branch. 



25. Chinese grass-cloth fibre, a, normal fibre ; b, fragments boiled with nitric 



acid ; c, afterwards treated with sulphuric acid and iodine. 



26. Puya fibre, a, normal fibre ; b, fragments boiled with nitric acid ; c, after- 



wards treated with sulphuric acid and iodine. 

 26*. Stellate hairs from the epidermis of Deutzia scabra. 



27. Stellate hair of ivy-leaf. 



28. Stellate hair of Alyssum. 



29. Horizontal stalked hair of Grevillea lithidophylla. 



30. T-shaped hair of garden Crysanthemum. 



31. Ramentum or scale from a germinating fern. 



32. Hair from the bulbil of Achimenes. 



33. Hair from the corolla of Digitalis purpurea. 



34. Hair from the corolla of Antirrhinum majus. 



35. Branched hair from the epidermis of Sisymbrium sophia. 



36. Forked hair from Capsella bursa-pastoris. 



37. Branched hair of Alternanthera axillaris. 



38. Gland of Dictamnus fraxinella. 



39. Epidermis of Dictamnus fraxinella. a, 6, hairs ; c, gland vertically divided. 



45. Vertical section of papilla of Mesem- 

 bryanthemum crystallinum. 



46. Seta of a rose. 



47. Tufted hair of Marrubium creti- 

 cum. 



40. Glandular hair of Lysimachia vulgaris. 



41. Glandular hair of Serophularia nodosa. 



42. Glandular hair of Bryonia alba. 



43. Scale of Begonia platanifolia 



44. Glandular hair of Oilia tricolor. 



