Index . 
xi 
Figures. 
page 
a side-branch. b. Terminal budding to form a trichome. c. False 
appearance of dichotomy, d. Trichome developed on the median 
line. e. Trichome developed to one side of the mjdian line. 
f. Looped central strand filament (Cleland) . . . .32') 
3. A cystocarp developing its first carpospores, showing, the withering 
trichogyne, condition of the chromatophore, the fusion of the stalk- 
cells, and food particles in the stalk (Cleland) .... 340 
1. Inner surface of the cortex of Bombax malabaricum, when producing 
Mocharas (Petch) 412 
2. Longitudinal section of the cortex of Bombax malabaricum, when pro- 
ducing Mocharas. A, wood ; B, abnormal cortex ; c, normal cortex 
with lignified fibres ; d, galleries of Mocharas ; E, browned tissue , 
showing extension of Mocharas formation; f, lignified vessels 
(Petch) . 413 
r. Tragopogon orientalis. Transverse sections of the extreme base of the 
central cylinder of the stem, numbered from below upwards 
(Worsdell) 426 
2. Tragopogon. Longitudinal section of the lower part of the central 
cylinder of the stem, showing the typical origin and course of the 
medullary strands in the genus (Worsdell) 426 
3. Tragopogon orientalis. Segment of vascular ring, showing internal- 
phloem strands imps) (Worsdell) 426 
4. Tolpis barbata. Vascular ring, showing transitions between some of its 
constituents and the medullary bundles (mb). Rudimentary medullar 
strands (bundles and phloem-strands) are shown at ms (Worsdell) 126 
5. Lactuca virosa. Segment of vascular ring from lower part of stem ; in 
the pith are scattered bundles and phloem-strands (Worsdell) . 431 
6. L. virosa. Ditto from upper part of stem, showing arc-shaped internal - 
phloem-strands (Worsdell) 431 
7. L. Plumieri. Petiole, showing vascular ring ( vr ) and medullary strands 
(ms) (Worsdell) 431 
8. L. alpina. Petiole, showing vascular ring and medullary strands (ms) 
(Worsdell) . . . 431 
9, 10. Crepis biennis. Segments of vascular ring of stem, showing medullary 
strands (ms) in the bay formed by the outgoing median leaf-bundle 
(mlb). One of the lateral leaf- bundles at lib (Worsdell) ®. . 434 
11. C. biennis. Petiole, showing the vestigial character of the adaxial 
portion of the vascular ring (avr), the central medullary strands 
(cms), and the peripheral medullary strands (pms)>( Worsdell) . 435 
12. Picris hieracioides. Vascular ring of stem, showing its vestigial outer- 
most constituents (vvr) and two peripheral medullary bundles (mb) 
(Worsdell) 437 
13. P. strigosa. Vascular ring and medullary bundles (mb) (Worsdell) 438 
14. Helminthia echioides. Segment of cylinder of stem, showing vascular 
ring and the scattered medullary phloem-strands (mps) (Worsdell) 438 
15. Cynara Scolymus. Segment of vascular cylinder and cortex (c) of 
uppermost portion of peduncle, showing the scattered disposition of 
the bundles (Worsdell) . 440 
16. C. Cardunculus. Petiole, showing scattered disposition of the bundles 
(Worsdell) 440 
1 7. Gundelia Tournefortii. Segment of cylinder of stem, showing scattered 
medullary phloem-strands (mps) (Worsdell) .... 442 
18. Senecio clivorum. Petiole, showing extreme scattered disposition of 
the bundles (Worsdell) 442 
19. Petasites officinalis. Peduncle of male plant, showing scattered disposi- 
tion of bundles (Worsdell) 443 . 
