48 



PTEEIDOSPERMEAE 



[CH. 



those of Davallia (Odontosoria) aculeata 1 , a West Indian fern of 

 climbing habit and with the prickles on Hemitelia and other 

 recent Cyatheaceous fronds 2 , while capitate glands, though simpler 

 than those of Lyginopteris, occur on the leaf-stalks of some recent 

 Polypodiaceous species 3 . The concentric meristele may consist 



FIG. 405. Lyginopteris oldhamia. A, petiole section; a, glandular emergence; 

 r, root. B, stalked gland ; s, stoma. C, inner edge of wood of a stem ; c, arc 

 of inversely orientated vascular tissue. D, D', part of a frond of Sphenopteris 

 Hoeninghausi. E, part of axis of D. (A, C, D, Kidston Coll. ; B, Manchester 

 Coll. R. 645.) 



in the lower part of the petiole of two separate and slightly 

 curved strands like those seen in fig. 404, E, m: sooner or later 

 the two strands unite to form a wide-open V or a W-shaped 

 bundle with several slightly internal protoxylem groups close to 

 The two sections represented in fig. 406, A and 



the lower edge. 



1 Vol. ii. p. 299, fig. 232. 

 3 Hohlke (02). 



2 Bower (12) Pis. xxx. xxxin. 



