|First Collector||G. Rink|
|Habitat||Lees Ferry, Colorado River|
Cross-section round. Outline wavy. Culm center hollow. Recognizable epidermis cells. Peripheral sclerenchymatic stabilisation structure (girders) rectangular. Vascular bundles integrated in peripheral stabilisation structure (girders). Sclerenchymatic she
Outline wavy. Upper and lower epidermis cells of equal size and shape. Vascular bundles centered between the upper and lower side of the leaf. Girders extending from the vascular bundle to both sides of the leaf.