102 STUDIES IN FOSSIL BOTANY 



borne singly on long pedicels or sporangiophores, 

 which sprang from the upper surface of each verticil 



of bracts in its united part, 

 near the axis (Fig. 41, A, 

 sp, Fig. 42, B and C). The 

 pedicels are generally twice 

 as numerous as the bracts ; 

 they are ranged in a single 

 whorl, but are of unequal 

 lengths, so that the spor- 

 angia of the same whorl 

 overlap each other (Fig. 

 42). This gives the im- 

 pression that more than 

 one verticil of sporangio- 

 phores may spring from a 

 single whorl of bracts, but 

 this is not the case, though 

 the point at which the 

 sporangiophore becomes 

 free from the bract is 

 variable. 

 fig. ip.—sphenojihyiium Dawsoni,$. Some- The pedicel is a slender 



what oblique longitudinal section of cone, . . 



mostly tangential, but passing through axis StalK, DeCOming rattier 



below C, where the bracts are connected with . •* • i ., . , 



the axis. Five verticils (A-E) are shown, thicker near the top, where 

 At / Md D the bracts are connate; at a i1: bends ° ver towards the 



and ft they have separated ; at B and C 



the attachment of sporangiophores to bracts a XlS of the COIie, and bears 



is shown ; at E, especially to the right, the 



relation of sporangiophore to sporangium 3. Single DenduloUS SDOI> 



is very clear, x 9. From a photograph . 



by Mr. Lomax. University College Col- anglUm. I lie position of the 



lection, EE, i, c. . • . 1. ■, 



sporangium on its pedicel 

 is much like that of an anatropous ovule in relation to 

 its funiculus (cf. Figs. 41, A, 42, E, 43, and 44). 



