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Index. 
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Figures. 6. Diagrammatic transverse sections of the ovule (Kershaw) . . 632 
7. Longitudinal section of sporophyll (Kershaw) .... 632 
8-12. A series of transverse sections through the sphorophyll (Kershaw) 633 
13. Longitudinal section of an ovule (Kershaw) 634 
T4. Outline drawing of median longitudinal section of young abnormal 
ovule (Kershaw) 639 
15, 16. Outline camera lucida drawings of median longitudinal sections of old 
abnormal ovules (Kershaw) ....... 639 
1. Longitudinal reconstruction of the xylem of Cone A of Equisetum 
(Browne) 667 
2. Longitudinal reconstruction of the xylem of Cone C of Equisetum 
arvense (Browne) 669 
3. Longitudinal reconstruction of the xylem of Cone A of Equisetum 
palustre (Browne) 671 
4. Longitudinal reconstruction of the xylem of Cone D of Equisetum 
palustre (var. polystachion) (Browne) . . . . .672 
5. Longitudinal reconstruction of the xylem of Cone A of Equisetum 
limosum (Browne) 676 
6. Longitudinal reconstruction of the xylem of Cone B of Equisetum 
limosum (Browne) 677 
7. Different forms of course of the strands at the nodes (Browne) . 681 
8. Reconstruction of uppermost part of fertile stem of Equisetum 
limosum (Browne) 687 
9, 10. Reconstruction of uppermost part of fertile stem of Equisetum 
limosum (Browne) ... . 688 
Diagram 1. Convolvulus tricolor, var. major (Lee) . . . 729 
„ 2. Convulvulus tricolor (Lee) 730 
I. Cuscuta Epilinum on Linum usitatissimum (Lee) .... 732 
Diagram 3. Nicandra physaloides (Lee) ..... 733 
„ 4. Atropa Belladonna (Lee) . . . . . . 734 
,, 5. Datura Stramonium (Lee) ...... 735 
,, 6. Diascia Barberae (Lee) ...... 739 
,, 7. Incarvillea Delay vei i v Lee) . . . . . .741 
1. Transverse section, young petiole of Osmunda regalis (Holden) . 783 
1. Map showing distribution of certain species of Spiraea (Yapp) . 817 
2. Sympodial rhizome of Spiraea Ulmaria, showing four years’ growth 
(Yapp) 818 
3. Sections of a 4 sun ’ leaf and a ‘ shade ’ leaf of Spiraea Ulmaria (Yapp) 822 
4. Three leaves from one erect flowering shoot of Spiraea Ulmaria, var. 
denudata (Yapp) .......... 823 
5. Selected leaves from two flowering shoots (Yapp) . . . .825 
6. Stomata from different leaves (Yapp) . . . . . .827 
7. Section through part of a young developing leaf, while in the bud (Y app) 831 
8. a, Transverse section through part of an apical bud; B, a single 
leaflet just emerged from the bud; c, a still later stage (Yapp) . 832 
9. Curves of mean evaporation and light intensity (Yapp) . . . 836 
10. Diagrammatic section through a group of plants of Spiraea Ulmaria 
(Yapp) 837 
II. To illustrate localization of withering in leaves exposed to wind, &c. 
(Yapp) 841 
1. Green and dry weights of 1,000 grains (Brenchley) . . . 904 
2. Percentage of dry weight to green weight (Brenchley) . . . 905 
3. Actual water contained in 1,000 grains (Brenchley) . . . 905 
4. Percentage of nitrogen in dry matter of grain (Brenchley) . . 906 
5. Actual nitrogen contained in 1,000 grains (Brenchley) . . . 907 
6. Percentage of protein nitrogen in nitrogen (Brenchley) . . , 908 
