LIST OF PLANTS USED FOE STUDY. 465 



Eqtiisetum limosum. For reproduction, 363. Cones, fresh ; in ditches, June 



and July. 

 Erica (Heath). Compound pollen-grains, 391. Flowers. Fresh. Any 



species will do, and hence obtainable nearly all the year round, 



either from open ground or greenhouse. (For substitutes, see Calluna, 



Azalea, Rhododendron). 

 Euralyptus globulus (Australian Blue-gum). Wax -layer, 99. Leaves. 



Fresh. Half-hardy perennial evergreen tree. 



Substitute for Ruta (q.v.) for leaf structure, 195. 

 Euonymus japonicus (Spindle-tree). Growing apex, 212. Terminal buds. 



Fresh, or in alcohol. All the year round. Ornamental evergreen 



shrub ; half-hardy in colder districts. 

 Euphorbia helioscopia (Sun-spurge). Starch-grains, 19. Stems. Fresh. 



A native annual weed of cultivated ground. 



For crystals of calcium phosphate. Inflorescence in alcohol, 



70. Summer. Also found in the greenhouse E. Caput-Medusai, 



in ground tissue of stems. 



splendens and E. Jacquinceflora. Starch -grains and latex, 19 ; 



latex-cells. Stems. Fresh, or in alcohol. Hothouse evergreen 



shrubs. 



F. 



Fagus sylvatica (Beech). Differing structure of leaves when shaded and 



exposed, 195. Leaves from centre and outside of tree. Fresh, or 



in alcohol. 

 Ferns. Prothallia and sexual organs. See Ceratopteris and Polypodium. 



Sporangia. See Scolopendrium, Aspidium. 



Structure of growing apex of root. See Pteris cretica. 



Structure of stele. See Pteris aquilina. 

 Ficus elastica (India-rubber tree). For cystoliths, 64 (footnote). Leaves. 



Fresh. A popular greenhouse decorative plant. 

 Fir, Scotch. See Pinus sylvestris. 

 Flag, Sweet. See Acorus Calamus. 

 Fraxinus excelsior (Ash). Leaf-fall, 203. Leafy twigs. Fresh. Can be 



used as substitute for ^Ksculus. For growing points, as substitute 



for Euonymus, 215. 

 Fritillaria imperialis (Crown Imperial). Structure. Pollen, 386. Young 



flowers. Alcohol-material. 

 - persica. Cell and nuclear division, 438. Flower-buds of different 



ages. Fresh, and fixed. (As substitute, almost any species of 



Fritillaria, Lilium, Alstrameria, or other Liliacese or Amaryllideae.) 

 Frog-bit. See Hydrocharis. 

 Fuchsia. For water-pores, 89. Leaves. Pollen-grains, 387. Flowers. 



Fresh. (Substitute for (Enothera, q.v.) 

 Fucus platycarpus and F. vesiculosiis. For structure, 240. Fresh, or in 



alcohol. 



30 



