104 



GENERA OF UNCERTAIN POSITION 



[CH. 



Sewardia latifolia (Saporta). 



1849. Otozamites latifolia Brongniart, Tableau, p. 106. 



1872. Sphenozamiies latifolius Schimper 1 , Traite, Vol. n. p. 163. 



Cycadorachis armata Saporta, Plant. Jurass. p. 196, PL 117, fig. 1. 



Withamia armata Seward, Wealden Flora, Vol. n. p. 174, PL n. 

 figs. 1, 2; PL V. fig. 1. 



Sewardia latifolia Zeiller, Elements Paleobot, p. 233. 



1875. 

 1895. 



1900. 



This species is represented by woody axes, about 1 cm. in 

 breadth reaching a length of 50 cm., from the Wealden beds of 

 Sussex, bearing more or less orbicular, entire, leaves or leaf-like 



B 



FIG. 674. Sewardia latifolia. Axis (A) and single leaf (B). (British 

 Museum; f nat. size.) 



organs, 6 cm. or more long, in the axil of stout recurved spinous 

 processes (fig. 674, A, B). The leaves are sessile and the venation 

 is of the Cydopteris type. Spinous axes of the same form had 

 previously been described by Saporta from Kimeridgian rocks in 

 France as Cycadorachis armata, but these show no indication of 

 leaves and were regarded as Cycadean. In a letter written to me 

 in 1895, shortly before his death, the Marquis of Saporta 2 suggested 



1 See also Saporta (75) A. p. 188, Pis. 112, 113. 



Seward (95) A. p. 175. 



