Boodle . — Anatomy of the Schizaeaceae . 403 
Hairs. 
The hair-structures of the Schizaeaceae need not be fully 
described here, as details are given by Prantl (’ 81 , p. 35). 
Two kinds of hairs are found, namely stout or long hairs, 
each consisting of a single row of cells, which may or may 
not bear a glandular cell at the top, and short glandular hairs, 
consisting of either one or two cells, and usually adpressed. 
The glandular cell of these short hairs is therefore either 
seated on the epidermis or on a single stalk-cell. It is oval, 
and has a distinct nucleus. The larger kind of hairs, in this 
case blackish and not glandular, are found for instance densely 
covering the stem apex and leaf-rudiments of Lygodium 
dichotomum. On the young petiole of Anemia; Phyllitidis 
there are both long filiform brown hairs (e.g 3 mm. in length), 
and small unicellular glandular hairs. Both kinds of hairs of 
similar proportions were found by Britton and Taylor (’01, 
p. 13) in Schizaea pusilla . 
Mohria cajfrorum is exceptional in possessing paleae, 
resembling those of the Polypodiaceae, but it is interesting 
to find that in Lygodium dichotomum longitudinal divisions 
occasionally take place in the long hairs, so that the basal 
part is converted into a flat plate of cells, i. e. a small palea. 
Prantl does not appear to have seen any such cases, but he 
regarded the long uniseriate hairs as homologous with the 
paleae of other Ferns (’ 81 , p. 37). The rhizome of Mohria 
bears paleae, long rhizoid-like hairs, and also very numerous 
unicellular glandular hairs, identical with those of Anemia. 
The Stele. 
An important paper dealing with the stele has recently 
been published by Jeffrey (’00). In this paper the structure 
of the stem in seedling plants belonging to several groups 
has been carefully described, and the manner in which the 
mature structure is attained has been followed, the changes 
in the disposition of the vascular elements and the behaviour 
of the endodermis being worked out in relation to the leaf- 
gaps. Further, wide generalizations as to the morphology 
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