Fig. 12 



Lepidodendron : a, reconstruction; b, c, leaf bases. Lepidostrobus : 

 D, l.s. of an idealised cone; e, t.s. sporophyll. Lepidocarpon: 

 F, t.s.; G, l.s. Sigillaria: h, reconstruction; i, leaf bases. Stig- 

 marian appendages: J, t.s. (1, ligule pit; 2, area of leaf base; 3, 

 vascular bundle; 4, parichnos scars; 5, sporangium wall; 6, 

 flange of sporophyll; 7, ligule) 



(a, b, c, h, I, after Hirmer; f, Scott; g, Hoskins and Cross) 



