166 BOTHRODENDRON. 



south of Ireland, and in the Devonian rocks of Australia and the 

 Arctic regions. It recalls certain of the Sigillariae, especially the 

 Stibsigillariae of the Leiodermaria section, and also shows affinities 

 in the type of cone to the Lepidodendreae. It may probably 

 be regarded as occupying an intermediate position between these 

 two families. 



Genus BOTHRODENDRON, Lindley & Button, 1833. 



[Foss. Flora, vol. ii, explan. to pis. lxxx, lxxxi.] 



Leaf-cushions only found on the smaller or younger branches, 

 approximate, elongate, rhomboidal, slightly raised. Leaf-scars 

 small or minute, transversely oval, usually distant, separated by 

 broad bands of bark, more rarely on leaf- cushions. Leaf- scars 

 bearing two lateral, and one central, minute, punctate prints. 

 In some species a small print also occurs immediately above the 

 leaf-scar. Bark ornamented by series of fine wrinkles or striae, 

 straight or flexuous, arranged longitudinally, transversely, or in 

 both directions, sometimes smooth. Leaves small, linear or 

 lanceolate, uninerved. Cones similar in type to Lepidostrolus. 

 Internal structure of the stem for the most part similar to 

 Lepidodendron. 



The genus extends from the Upper Devonian to the Coal 

 Measures, and possibly to the Permian. 



Bothrodendron Leslii, Seward. 



(Text-fig. 36.) 



1903. Bothrodendron L/slii, Seward, Ann. S. African Mus., vol. iv, pt. 1, 

 p. 87, pi. xi, figs. 1, la, lb, 4, 5, 6. 



Type. S. African Mus., Cape Town. 



Dichotomously branched, cylindrical stems without leaves, 

 6-2n mm. in breadth. Leaf-cushions absent. Leaf-scars small, 

 transversely oval or subcircular, numerous, not very distant or 

 almost crowded, prominent with a central depression, or occurring 

 as a depression with a central umbo having a small pit in the 

 centre. Bark smooth or somewhat wrinkled. 



The largest specimen figured by Mr. Seward is 29 cm. long, 

 and is partially decorticated, especially in the lower portion. 



