Equisetum myriochaetum (Giant Horsetail) – This prehistoric remnant is among the tallest of the living horsetails. Given optimum conditions, which includes a. Descriptions and articles about Equisetum myriochaetum in the Encyclopedia of Life. Includes Overview; Brief Summary; Comprehensive Description;. Taxonomy. Morphology Equisetum myriochaetum has. Stems – (- ) cm x 7 mm, with 16 – 44 ridges; Branches regularly in whorls. branches

Author: Faegami Dalabar
Country: Zimbabwe
Language: English (Spanish)
Genre: Science
Published (Last): 18 February 2007
Pages: 101
PDF File Size: 19.71 Mb
ePub File Size: 11.19 Mb
ISBN: 294-8-15952-316-9
Downloads: 38737
Price: Free* [*Free Regsitration Required]
Uploader: JoJogrel

It is likely that the silicates have something to do with structural support as well as physical protection against pathogens. They tend to absorb heavy metals, and so may be useful as biological monitors of water or soil contamination by zinc, cadmium and lead.

Hypoglycemic effect of Equisetum myriochaetum aerial parts on type 2 diabetic patients.

The ranges of exposure concentrations for these genotoxicity experiments were between 0. The results demonstrate clearly that the phytotherapeutic extract from Equisetum myriochaetum, under the experimental conditions tested, is not genotoxic in equietum in vivo experiments or in the in vitro studies.

It also may explain why the horsetails have been so successful. They were some of the first plants on land and it is likely that some will be here to stay, even if we go the way of the Devonian forests. Whenever you cross paths with an Equisetumyou are looking at a member of the sole surviving genus of a once great lineage.

Some thoughts on Equisetum arvense Culham Research Group. Historically, the ferns and horsetails were believed to be separate lineages.

The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. The phylogenetic grouping of the land plants has been subject to a large amount of change over time and no grouping has gone unchallenged. Horsetails show promise as ground covers for dikes, road cuts, abandoned strip mines and other bare areas.


Today it tends to be used to describe species that appear relatively unchanged from their ancestors in the fossil record. In this study, phytotherapeutic extracts from Equisetum myriochaetum were investigated for genotoxicity in the in vivo wing spot test in Drosophila melanogaster and in the in vitro human micronucleus test. As well as being found in the Reading University tropical glasshouseEquisetum myriochaetum grows natively in south and Central America between Mexico and Peru [7].

One Response to Horse tales: The tallest of the extant horestails are the giant horsetail Equisetum giganteum and the Mexican giant horsetail Equisetum myriochaetum of Central and South America.

All horsetails are deep-rhizomed and spread rapidly. They reproduce sexually by the production of spores but also asexually by rooting rhizomes or stem pieces [7]. The main constituents of the phytoextract are flavonol glycosides kaempferolphytoesterols and carbohydrates.

Equisetum fossil stem, University of Reading archaeology department.

Equisetum myriochaetum is a Mexican plant used in folk medicine to treat kidney diseases and type 2 diabetes mellitus. These shared characteristics are factors that explain why the horsetails can become invasive species. We received our stock on this plant from Monterey Bay Nursery who received it from the University of California, Berkeley – their accession listed it as collected in Veracruz, Mexico.

All gardeners and allotment holders are familiar with horsetails euisetum the problems of eradicating them from their land.

This file is licensed under the Creative Commons Attribution 2. This image was originally posted to Flickr by Dick Culbert at https: Equisetum myriochaetum can easily be mistaken for some other species of horsetail within the same sub-genus in particular Equisetum giganteum and Equisetum xylochaetum [5][7].


Equisetum giganteum Chad Husby for scale. Proudly powered by WordPress. This relatively small jump is enough to allow spores on the ground to be caught by the wind enabling further dispersal [9]. Commonly known as scouring rush the horsetails have been used by early pioneers in America as well as desperate campers today to clean pans. Like all horsetails, Equisetum myriochaetum grows well in wet fertile areas and they are often found growing in tropical forests alongside streams and swamps.

Equisetum myriochaetum

Determining the number of species that exist in the Equisetaceae and how they are related to each other has been difficult because members exhibit a large amount of morphological plasticity and hybridisation occurs frequently. Equisetum have superficial stomata and branched stems [5].

Sorry, your blog cannot share posts by email. They thrive in nutrient poor soils and their deep, wide-ranging rhizomes myriochwetum make control difficult to impossible. Despite their diminutive appearance, many horsetails are quite hardy and thrive in human disturbance.

Under the microscope you can see that each spore has 4 legs or elaters that curl and uncurl in response to changes in the atmospheric water content. Our coal deposits were formed from the vegetation that grew during the carboniferous myrioochaetum.

File:Equisetum myriochaetum, the Giant Horsetail (11310017733).jpg

However, the horsetails that grow today look very similar to the ones we see in the fossil record. Love them or hate them, they have stood the test of time. Description Equisetum myriochaetum, the Giant Horsetail