|First Collector||M. Hansen|
|Habitat||Petrified National Forest|
Cross-section round. Outline wavy. Culm center hollow. Recognizable epidermis cells. Continuous peripheral sclerenchymatic belt. Large vascular bundles in one row. Solitary large vascular bundles. Vascular bundles integrated in peripheral stabilisation st
Outline with rips. Upper epidermis cells in one row. Vascular bundles near the upper side of the leaf.