EXPLANATION oK PLATK IV. 



Kij;. <i, hraiicli showiuj; the teriniiia! sprint; shoot of thu seasmi with chaiai'teristii-., larfio silvery white winter 

 biul; tlic buuilk'S of Icavrs arise from the axils of the leaf-braits of the last two seasous, the first leaves of the second 

 year already sheil ; />, detached bnndle of mature li'aves with sheath ; r. d, scales of the sheath, magiiilied three and 

 nine times; e, transverse section through base of leaf bundle showing imbrication of sheath scales, njagnilied JfO 

 diameters; ./', transverse section of au immature leaf, magnified 30 diameters; y, transverse section of a mature leaf, 

 magnified 45 diameters, showing the microscopic structure (as pointed out tor /*. echinata, f, /) ; li, longitudinal seo 

 tion of the dorsal side of a mature leaf showing two rows of stomata and the serrated edge, magnified 45 diameters. 



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