Sphenophyllum

Sphenophyllum is a genus in the order Sphenophyllales. ...
Found on http://en.wikipedia.org/wiki/Sphenophyllum

Sphenophyllum

a genus of plants representative of the extinct order Sphenophyllales, class (or subdivision) Sphenopsida. It appeared first in the Late Devonian ...
Found on http://www.britannica.com/eb/a-z/s/139
No exact match found