782 MICROSCOPIC OBJECTS. 



Pollen Tubes. — CEnothera, Antirrhinum, Hibiscus, Linaria, Gesnera, 

 Crocus. 



Embryonic Cells. — Orchis, Listera, Hippuris, Euphrasia, Draba. 



Spores or Reproductive Cells. — In Cryptogamous plants, Ferns, 

 Mosses, Lichens, Algse, and Fungi, Zygnema when conjugating. 



Cells with Siliceous Covering. — Diatoms, cuticle of grasses, 

 Equisetum. 



Cells encrusted with carbonate of Lime. — Chara. 



Epidermal Cells. — Leaves of Hyacinth, petals of Pelargonium, 

 Apple, Duckweed, Hellebore, and Digitalis. 



Hairs. — On leaves, and in pappus of Compositse, Cotton (twisted), 

 articulated hairs on leaves of Goldfussia and Alstroemeria ovata, pap- 

 pus of Trichinium, moniliform hairs on stamens of Tradescantia, stel- 

 late hairs of Deutzia, Viburnum Opulus, Ivy, Hollyhocks, and Fatsia 

 papyrifera, peltate hairs of Malpighia urens, glandular hairs of Nettle, 

 Loaza, Chinese Primrose, Drosera, and Dionsea, branched hairs Ver- 

 bascum, forked Apargia hispida, Alyssum, stalked cruciate hairs Arabis 

 sinensis, clubbed hairs on filament of Verbascum nigrum, capitate 

 hairs of Scrophularia nodosa, beaded hairs MirabUis Jalapa. 



Glandular Cells. — Sweet-Brier, Passiflora lunata. Ice-plant, LUac, 

 Cinchona, lupuline glands of Hop, Ehamnus, Kottlera, Aloysia, Mentha, 

 in Pitchers of Nepenthes, and Sarracenia. 



Scaly Cells. — Ferns, as Polypodium sepultum, Niphobolus, Ceterach, 

 and Nothochleena laevis, scales of Hippophae, Begonia, Olive, and 

 Elaeagnus. 



Starch in Cells. — Potato, Arrow-root, Cereal grains. Bean and Pea, 

 Habenaria bifolia, rhizome of Florentine Iris. 



Baphides. — Hyacinth, Rhubarb, Arum, Colocasia, Onion, SquiU, 

 Balsam, Cactus, Lemna trisulca, Ficus (cystoliths), Aloe, Banana, 

 petal of Ornithogalum, bark of Salisburya adiantifolia, leaves of 

 Dieffenbachia seguina (biforines), sphseraphides, or globular clusters of 

 raphides, seen in the parenchyma of the leaf of the tea-plant. 



Air-Cells and Lacunce. — Rush, Sparganium ramosum. Papyrus, 

 Limnocharis Plumieri, Hippuris (mare's tail), Nymphsea, and other 

 aquatic plants. 



Oil-CeUs. — Rind of Orange and Lemon, leaves of Hypericum 

 and Myrtacese. 



Chlorophyll-Cells. — Mosses, Vallisneria, Anacharis, Chara, Green 

 Seaweeds. 



Colour-Cells. — Leaf of Rottlera tinctoria, petals of Pelargonium 

 and Geranium, Strelitzia. One way of preparing the petal of Pelar- 

 gonium is by immersing it in sulphuric ether for a few seconds, and then 

 allowing the fluid to evaporate. Another mode is simply to dry the 

 petal, immerse it for an hour or two in spirit of turpentine, and then 

 put it up in new Canada balsam. 



