INDEX AND GLOSSARY 



167 



ductivity of, 107; wind-borne 



germs of, 113 

 Fertilisation, 42, 45, 68, 73, 74, 



75, 156 

 Filamentous structure, 19 

 Findhorn river, 139 

 Fixed position, secondary, 28 

 Flagellates, certain unicellular 



organisms, motile in water, 



24, 156 

 Fleabane {Erigeron), 106 

 Flies, as bearers of spores, 117 

 Flixweed {Sisymbrium sophia), 



106, 108 

 Flora of the land, 48, 163 ; new, 



112 ; of the sea, 13 

 Flower, 48, 49, 53; parts of, 51, 



(Fig. 10) 53 ; origin of, 55, 67 

 Flowering Plants, 47, 55, 70, 77, 



156 

 Fluctuating variations, 119 

 Foliage-shoot, distinct from 



flower, 50, 54 

 Foot, the part of the embryo in 



Ferns and some other plants, 



which serves as a haustorium 



or sucker, 39 

 Fucus platycarpus, one of the 



common brown Tangles (Algae) , 



16 

 Fungi, 140; productivity of, 107 

 Funiculus, the stalk of the ovule, 



72, (Fig. 15) 73 



Gametes, the sexual cells, un- 

 differentiated in some of the 

 lower forms, but distinct as 

 male and female in all the 

 higher, 21, 23, 26, 72, 78; in- 

 equality of, 26; origin of, 25 



Gametophyte, that stage or phase 

 in the life-history which bears 

 the gametes, or sexual cells. 



In the Fern it is represented 

 by the prothallus, 46 



Generative cells, the male ga- 

 metes in the pollen-tube of a 

 Flowering Plant, (Fig. 14) 71 



Geometrical ratio of increase ; for 

 explanation see p. 105 



Germs, detachable living products 

 of the plant, used generally for 

 spores, seeds, or other bodies 

 from which a new individual 

 may spring, 102, 109 ; transfer 

 of, ' 104, 111 ; chances of life 

 of, 110; over-production of, 

 117 ; spread of, 161 



Ginkgo, the Maiden Hair Tree of 

 Japan, 78, 79 



Goebel, K., 116 



Goethe, 54, 67 



Golf Links, 145 



Gorse or Whin {Ulex europaeus), 

 142, 153 



Grey Dune, that type of Dune in 

 which the sand is covered by 

 a coat of vegetation, 140, 142, 

 147 



Ground-water, 138 



Gulf Weed (SdrgassiDii haccife- 

 rum), a form of Tangle, which 

 is found floating freely in large 

 quantities in the neighbour- 

 hood of the Gulf of Florida, 87 



Gymnosperms, a large body of 

 primitive Seed Plants, includ- 

 ing the Pines and Firs and 

 Cycads, characterised by having 

 their seeds exposed, 78 



Gynoecium (p. 72), the central 

 part of the flower in the Higher 

 Flowering Plants, composed of 

 the carpel or carpels, and en- 

 closing one or more ovules : 

 e.g. Fig. 15, p. 73 



