IUCN threat status:

Not evaluated

Comprehensive Description

Read full entry

Equisetum laevigatum is a rush-like perennial that rises from an underground rootstock structure. Normally the plant dies back over the winter, but some populations in the southwestern USA have individuals that can overwinter. The plant manifests jointed rough stems which are closed at the joints. The stem roughness are a result of inclusions of silica. Each stem exhibits longitudinal grooves that run vertically. Each joint has a sheath which is a minute pointed leaf-like structure. The species usually occurs along moist drainages in sandy and gravelly substrates.

The narrow green stems can attain heights ranging from 30 to 150 centimeters. The stems are generally unbranched and are capped with rounded cone-shaped sporangia. Stomata occur in single lines; moreover, the spherical spores of this species are green.

The appearance of this taxon is very similar to E. hyemale; moreover, The geometric arrangement of silica-tuberles at the shoot surface may be the best means to differentiate these two species.

Trusted

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© C. Michael Hogan

Supplier: C. Michael Hogan

Belongs to 0 communities

This taxon hasn't been featured in any communities yet.

Learn more about Communities

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!