1908.] HEVOPHYLLUM SPIRALE, SP. NO V. 173 



4. Cross section of the primary stem, of a frond of young stage, nat. 



size. 



5. A part of cross section of stem, x 40. The glandular cavities 



are seen near the periphery. 



6. A portion of stem, turned twice and half. nat. size, p primary 



stem, s scar of the worn primary lamina. G. the thick basal 

 portion of the external margin of the lamina. 



7. Diagramatic figure showing the spiral turning of the secondary 



stem of HedopJiyllum spirale. p primary stem, s scar of 

 the worn primary lamina. 



8. ditto of TJialassiophyllum crathrus. 



9. Diagramatic figure of a part of branch of AriJirotJiamnus hifidus. 



p primary stem. S^ S2 S^ indicating the scars of the primary, 

 secondary, tertiary lamina respectively ; S\, 8^2} ^S'-^, the scars of 

 the corresponding laminae turned inward and travelling upward 

 along the inner margin of the stems. 



10. A young stage of ArtJirothamnus hifidus ; view from the dorsal 



side. ca. i nat. size. The primary lamina is almost worn away. 



11. A more advanced stage of the same, view from the lateral side. 



The secondary rhizomes are in issue. The scar of the primary 

 lamina facino; against substratum, ca A nat. size. 



