PLATE 21.— Hairs, Fibres, Glands, &c. of Plants. 



Figure 



1. Cotton. «, normal condition; 5, portion treated with sulphuric acid and iodine ; 



c, a fragment of gun-cotton. 



2. Flax, a, normal fibre ; 5, portion boiled with nitric acid ; c, treated with nitric 



acid, and afterwards with sulphuric acid and iodine. 



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



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



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



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



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



8. Sting of TJrtica urens. 



9. Surface of the cuticle o{ Hell eborus foe tidus. 



10. Ditto of Cakile antericana. 



1 1. Imbedded gland of Ruta graveolens, vertical section. 



12. Glands o^ Magnolia, seen from above. 



13. Hair oi Siphocamjnjlus bicolor, the cuticle detached by sulphuric acid. 



14. Glands of hop. a, side view ; 6, from above. 



15. Stellate body from the air-spaces in the lea^ oi Nuphar lutea. 



16. WmY oi Delphinium pinnatifidiim. 17. Haiv of Anchicsa crispa. 



18. Hair of Pelargonimn. 19. ^rhnched hair of Ve?'bascum Thapsus. 



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



2 1 . Annulated hairs from the seed of Ruellia formosa, in water; 5, detached cell -wall. 



22. Spiral-fibrous hairs from the seed of Collomia grandifiora, in water. 6, 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 spicatwn. 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, afterwards 



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 Ahjssum. 



29. Horizontal stalked hair of Grevillea lithidophylla. 



30. T-shaped hair of garden C^;"ys6r;«^Ae;/2?^^. 



31. Ramentum or scale from a germinating fern. 



32. Hair from the bulbel 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 Alter nanther a axillaris, 



38. Gland of Diet amnus Fraxinella. 



39. Epidermis of Dictamnus Fraxinella. a, b, hairs ; c, gland vertically divided. 



40. Glandular hair of Lgsimachia vulgaris. 



41. Glandular hair of Scrojihularia nodosa. 



42. Glandular hair of Bryo7iia alba. 



43. Scale of Begonia plat anifoUa. 



44. Glandular hair of Gilia tricolor. 



45. Vertical section of papilla of Mesembryanthemum crystullinum. 



46. Seta of a rose. 



47. Tufted hairs of Marrubium creticum. 



