H. W, KING ON THE r-HYSlOLOGY OF MONSTEKA DELICIOSA. 135 



Explanation of Plate VI. ' 



Fig. 1. — A branch of Monstera deliciosa. a. Aerial roots, b. 

 Petiole cut across showing concavity, c. Inflorescence 

 with spathe coiled round, d. Spathe open showing 

 spadix and spirally arranged pistils. e. A leaf 

 uncoiled preparatory to assuming the horizontal 

 position as in /. g. Corrugated joint of petiole and 

 lamina, h. The natural perforations. 



„ 2. — Pistil and stamens from spadix. a. Aperture of stigma. 

 h. Immature stamens arranged round pistil. 



„ 3. — Pistil with matured stamen discharging pollen. 



„ 4. — Stamen as seen when first appearing above pistil. 



„ 5. — Stamen matured showing divergence, bulging and 

 splitting of anthers. 



, 6. — Diagrammatic section of pistil, a. Upper fourth, which 

 scales off the whole of the pistils of spadix when 

 period for fertilization is passed. The centre repre- 

 sents a typical ovary, style, and stigma, and probable 

 analogy of cast off portion to a style and stigma. 



Explanation of Plate VII. 



Fig. 1. — Transverse section of root. a. Irregular cylindrical 

 cells, h. Pitted ducts, c. Scalariform ducts. 



„ 2. — Growing end of root. a. New formed spherical cells, 

 6. The same, elongated and strengthened by deposit. 

 c. More enlarged cylindrical cell, showing deposit of 

 colouring matter over the cell wall. 



„ 3. — Longitudinal section of stem. a. Cells forming glan- 

 dular prominences. h. Irregular cylindrical cells 

 with raphide crystals in some. c. Small woody fibre 

 cells. d. Spiral vessels, e. Scalariform vessel. /. 

 Cluster of needle-shaped raphides. g. Pitted ducts. 



,, 4. — Longitudinal section of petiole, a. Glandular promi- 

 nences. 6. Cylindrical cells, c. Small cells of woody 

 fibre, d. Spiral vessels, e. Large cells of woody 

 fibre. /. Needle-shaped raphides. g. Square-formed 

 raphides. h. Laticiferous tissue. 



