8h) with minor contributions from lycopsids (Lepidodendron
and Lepidophloios), sphenopsids (Calamites), and possible tree ferns and pteridosperms (Ielpi et al.
Likewise, "Several specialized mechanisms for accommodating girth increase evolved: tangential interarea expansion in Sigillaria and Synchysidendron, interarea fissuring in Diaphorodendron, and subcushion cellular expansion in Lepidodendron
" (Bateman et al., 1992, p.
Clement seemed to prefer collecting tree trunk and woody material of Lepidodendron
, Sigillaria, Stigmaria, and Calamites, over leafy material as only three specimens of leaves (Pecopteris and Neuropteris) occur in the collection.
Painting by Annette Townsend (Amgueddfa Cymru) Fossilised bark of the main stem of a Lepidodendron
showing the diamond-shaped cushions where leaves were originally attached (the cushions are about 10cm long).
Thus a single scale tree may be represented by a fossil stem called Lepidodendron
, leaves called Lepidophyllum, and the spore-bearing organs Lepidostrobophyllum and Lepidostrobus, as well as the Stigmaria roots.
Dawson Principal of McGill happiest with a pickaxe author of Acadian Geology a scratched record of displaced rock not people 1877, armed with a Royal Society grant, 50 English pounds and Canadian dynamite blowing his way to a stand of 25 Lepidodendron
(1995) and Saber (1998) described de following flora: Calamites, Asterophyllites equisetiformis, Annularia, Macrostachya, Sphenophyllum oblongifolium, Lepidodendron
, Pecopteris arborescens, P.