i6 CONTEXTS 



trioundsel — Willow-herl) — Bird ajjency — Seas and rivers 

 — Dispersion by elastic force— Pansy — Balsam— Furze- 

 Broom— Squirting cucumber -Dispersion by hygrometric 

 sensitiveness — Barley— Feather-grass— Mexican insect- 

 Dispersion by sticky glands— Lin ncea Borealis — Salvia 

 glutinosa — Plumbago — Ground-nut self-buried. 



CHAPTFR XI. 

 Germination . . . • • 249 



Testa and its various forms— Colloniia— Axis, tigelUun. 

 hypocotyle — Centre of growth — Double embryo — Three 

 conditions required for germination — Varying time in 

 different plants— Cedar of Lebanon — Railway-bank flora 

 —Broad beans— Cress seed— Tillandsia— Collecting .seed- 

 ling trees — Fern and moss spores — Prothallium — Arche- 

 gonium — Antheridium germ cells — Capsular fruit of 

 mosses — Protonema. 



CIIAPTKR XII. 

 l*llNSK)LOC;V OK Pl..\NTS .... 273 



Processes of plant growth — Nutrition — Water and gas as 

 plant food — Water culture — Osmosis — Experiment 

 showing absorption — Nitrates — Insectivorous plants able 

 to absorlj nitrogen to .some extent — Second experiment 

 on absorption — Preparation of plant food — Water bouquet 

 — Transpiration — Use of Stoniates — Respiration — Seeds 

 give off carbon-dioxide — Effect of light, darkness, and 

 heat — Reproduction — Protococcus — Strawberry runner — 

 Asexual and sexual rcjiroduclion — Efifect of cold upon 

 seeds. 



CHAPTER XIII. 



In.skctivorous Plants ...» 295 



Special purpose of each plant organ — Various modes by 

 which plants entrap in.sects — Sundew — Venus fly-trap — 



