Chapter VII: Plants That Are Carried by Animals

37. Squirrels leave nuts in queer places and plant some of them 61 38. Birds scatter nuts . . . . . . . . . . . . . . . . . . . . . 63 39. Do birds digest all they eat? . . . . . . . . . . . . . . . 64 40. Color, odor, and pleasant taste of fruits are advertisements . . . . . . . . . . . . . . . . . . . . . 65 41. The meddlesome crow lends a hand . . . . . . . . . . . . . . 68 42. Ants distribute some kinds of seeds . . . . . . . . . . . . 69 43. Cattle carry away living plants and seeds . . . . . . . . . 70 44. Water-fowl and muskrats carry seeds in mud . . . . . . . . . 71 45. Why some seeds are sticky . . . . . . . . . . . . . . . . . 72 46. Three devices of Virginia knotweed . . . . . . . . . . . . . 73 47. Hooks rendered harmless till time of need . . . . . . . . . 74 48. Diversity of devices in the rose family for seed sowing . . 76 49. Grouse, fox, and dog carry burs . . . . . . . . . . . . . . 76 50. Seeds enough and to spare . . . . . . . . . . . . . . . . . 78

CHAPTER VIII.--MAN DISPERSES SEEDS AND PLANTS.

51. Burs stick to clothing . . . . . . . . . . . . . . . . . . . 80 52. Man takes plants westward, though a few migrate eastward . . 83

CHAPTER IX.--SOME REASONS FOR PLANT MIGRATION.

53. Plants are not charitable beings . . . . . . . . . . . . . . 84 54. Plants migrate to improve their condition . . . . . . . . . 85 55. Fruit grown in a new country is often fair . . . . . . . . . 85 56. Much remains to be discovered . . . . . . . . . . . . . . . 86

BIBLIOGRAPHY . . . . . . . . . . . . . . . . . . . . . . . . . . 89

SEED DISPERSAL.