APPENDIX 0. 255 



Chapter X. — Potted plants of oxalis and sensitive plants, sun- 

 flower seedlings a foot or more high to show movement of leaves to 

 secure sunlight. 



Chapter XI Droseras and Sarracenias, potted and growing 



under beU glass, a cactus, a houseleek or an aloe, an Eclieveria or a 

 Cotyledon. 



Chapter XII. — Fresh lily leaves, microscopical preparations (see 

 list at end), fresh hydrangea or cucumber leaves, potted hydi-angeas 

 and rubber plants (§ 144), leaves of lettuce, hydrangea, maple, 

 hickory, or cucumber (§ 145), Elodea, Fontinalis, Spirogyra, etc. (foot- 

 note to § 149), growing nasturtium plants, early summer and late 

 fall leaves of trees in alcohol. 



Cliupter XIII. — Fresh flowers of any species of Tradescantia, or 

 living Chara or Xitella in water. 



Chapter XIV. — Flower-clusters of various kinds. 



Chapter X V. — Flowers of trillium, tulip, or buttercup. 



Chapter X VI. — Imperfect flowers, as those of v.'illow, poplar, 

 wahiut, birch, hazel, begonia. 



Chapter XVII. — Fresh pollen of Cytisus, sweet pea, or nastur- 

 tium, mounted slide of pollen (see list at end). 



Chapter XVIII. — Flowers of hazel, alder, pine gxasses (wind- 

 fertilized), insect-fertilized flowers from list in § 211. 



Chapter XIX. — Fruits of tomato, lemon, bean, dock. 



Chapter XX. — Fruits of ash, elm, or maple, of ]nilkweed, of 

 burdock, cocklebur, or beggar's ticks (Bidens), of cherry, or straw- 

 berry.i 



Chapter XXIII. — Protococcus (or Pleurococcus). Living speci- 

 mens are best, but mounted slides wUl answer. Living Spirog-yra, 

 mounted slides of Spirogyra in conjugation, desmids (fresh or 

 mounted), growing yeast, black mould growing, a mounted slide of 

 zygospores of IMucor, Polytrichum in various stages of growth, a 

 mounted slide of some moss protonema, whole fern plants (including 

 rootstocks), fruiting fern fronds, fern prothaUia (fresh, or mounted 

 for the microscope). 



1 Professor Byron D. Halsted, Eutgers College, New Brvmswick, New Jersey, 

 will furnish sets of 100 weeds and of 100 weed-seeds and fruits at $10 per set ; $20 

 for the two sets. 



