CONTENTS. XV 



PA OB 



Order 5. Gesneracese ....... 646 



6. Orobanchaceaa 646 



7. Lentibulariacese 647 



COHORT III. POLEMONIALES 647 



Order 1. Convolvulace 647 



2. Polemouiacese 648 



3. Solanacese 648 



4. Boraginacese 649 



COHOUT IV. GENTIANALES 650 



Order 1. Gentianacese . . 650 



,, 2. Loganiacese 651 



,, 3. Apocynaceaa 651 



4. Asclepiadac( se . . . . . . 651 



,, 5. Oleaceaj 652 



COHORT V. EBENALES 653 



Order 1. Sapotacese 653 



2. Ebenacesa 653 



3. Styracese 653 



COHORT VI. PRIMULALES 653 



Order 1. Primulaceaa 653 



,, 2. Myrsinacesa 654 



3. Plumbaginacese 654 



COHORT VII. ERICALES . . . . . . . .654 



Order 1. Ericaceae ........ 655 



2. Epacridacese 655 



,, 3. Diapensiaceae 656 



4. Pyrolacesa 656 



,, 5. Vacciniacess 656 



Series II. Epigyrue 656 



COHORT I. CAMPANALES 656 



Order 1. Campanulaceaa 656 



2. Lobeliaceas 657 



COHORT II. KUBIALES . 658 



Order 1. Kubiacese 658 



,, 2. Caprifoliaceaa 659 



COHORT III. ASTERALES * 660 



Order 1. Valerianacera 660 



2. Dipsacese 661 



3. Composite 661 



PART IV. THE PHYSIOLOGY OF PLANTS. 



1. Introductory 666 



CHAPTER I. GENEKAL PHYSIOLOGY. 



2. The Functions 666 



3. The External Conditions 671 



4. The Functions of the Tissues 674 



5. The Functions of the Members 680 



