Comparative Anatomy of the Hymeno- 
phyllaceae, Schizaeaceae and Gleicheniaceae. 
IV, Further observations on Schizaea 1 . 
BY 
L. A. BOODLE, F.L.S. 
With three Figures in the Text. 
I N a previous paper on the anatomy of the Schizaeaceae 
(Boodle, 1901 , p. 373) the vegetative structure of Schizaea 
digitata , Sw., was treated at some length, and a few observa- 
tions were added regarding S', dichotoma , Sw., and S. fistulosa, 
Labill. The two latter species could not be dealt with fully, 
as small pieces of the dried rhizome formed the whole of the 
available material. 
Further material of Schizaea has since been examined, 
namely, additional specimens of S', digitata , several plants of 
S', dichotoma , and of S', bifida , two specimens of a small form 
of S', dichotoma , and some seedling-plants of S', pusilla , Pursh. 
The structure observed in these species will now be described. 
Schizaea dichotoma. 
The general structure of the rhizome of S', dichotoma has 
already been referred to (Boodle, * 01 , p. 378, PL XIX, 
Fig. 11, and PI. XX, Fig. 15), but certain important features, 
which occur locally in parts of the stem of this species, call 
1 From the Jodrell Laboratory, Royal Botanic Gardens, Kew. 
[Annals of Botany, Vol. XVII, No. LXVII. June. 1903.] 
