VI 11 
Index . 
Figures. 
8 . 
9 - 
io. 
n. 
2 . 
3* 
4- 
5 - 
6 . 
7 - 
8 . 
9 - 
10. 
1 1 . 
12 . 
* 3 - 
I-I4- 
i5- 2 3* 
24-26. 
27-30. 
PAGE 
From a microphotograph of a young sporophyte just before the emergence of the 
cotyledon (Campbell) . . .152 
a. Two longitudinal sections of a young sporophyte, showing the arrangement of 
the vascular bundles. B. Two sections of a somewhat older sporophyte, showing 
second and third leaves (Campbell) 153 
A-D. Four transverse sections of a young sporophyte, showing the coalescence of 
the leaf- traces to form the axial stele. E. The stele, showing the complete 
coalescence of the xylems of the two leaf-traces. F. Section of the root, showing 
the endodermis and diarch bundle, g. Stem apex (Campbell) . . .154 
a. Longitudinal section of the stem apex of a young sporophyte. B. Root apex, 
c. Cross-section of the petiole of the cotyledon. D. Monarch bundle of primary 
root (Campbell) 155 
Rosa pimpinellifolia. Heterotype metaphase showing odd chromosome-like body 
(Blackburn and Harrison) . 163 
Somatic and heterotype metaphases in hybrids (Blackburn and Harrison) . 167 
The pentaploid roses. Somatic and heterotype equatorial plates (Blackburn and 
Harrison) 172 
R. sylvestris. ‘Octad’ before and after division (Blackburn and Harrison) . 175 
Section Villosae. Somatic and heterotype metaphases (Blackburn and Harrison) 177 
Centre, diagram of the woody genus Baccharis. Left, tangential view of the node 
of Helianthus. Right, tangential view of the nodal region of Bidens (Jeffrey 
and Torrey) 238 
Diagram of the nodal regions of a woody and an herbaceous species of Clematis 
(Jeffrey and Torrey) 239 
Diagram of the topographical relations' of leaf-trace and foliar ray in three dimen- 
sions. Left, a more delicate herbaceous stem. Right, a stem of more woody 
development (Jeffrey and Torrey) 240 
Diagram in three dimensions of thicker and thinner aerial stems of Xanthorhiza 
(a and b). Diagram of the root-stock of a species of Actaea, showing the topo- 
graphy of the rays in relation to appendages of both root and stem (c) (Jeffrey 
and Torrey) 241 
Diagram to illustrate the topographical relations of the leaf-trace to the leaf-ray at 
various heights in the tapering aerial stem of Potentilla (Jeffrey and Torrey) 244 
Study of Water-conductivity in Sycamore Wood (Holmes) 252 
a }f >) }>•••*• 2 53 
>> >> jj >>••••’ 2 54 
„ >, „ „ 2 55 
,3 „ „ * 2 56 
>3 >> 5* 2 5 / 
» 3, „ . „ ... 258 
33 37 33 73 2 59 
7 , 7 , 7 , 73 260 
77 „ „ „ 261 
33 3, „ 262 
33 33 7 , „ 2 64 
37 33 S 3 37 * • * * * 26 5 
The isolated, degenerate Amoeba nucleus from which the coagulated nuclear 
membrane has been partially separated (Seifriz) 283 
Cephalotaxtis pedunculata (Sahni) . . 297 
Cycadinocarpus augustodunensis (Sahni) . 297 
Semi-diagrammatic drawing showing mitosis in resting sporangium of Synchytrium 
endobioticum, Perc. (Welsford) 299 
Ensiform leaves (Iridoidea) (Arber) 304 
Semi-ensiform leaves (Liliaceae) (A rber) . . . . . . . 307 
Winged axes (Arber) 309 
Radial leaves in Iridoideae (Arber) 3 1 1 
