Two " Equisetum " plants are sold commercially under the names " Equisetum japonicum " ( barred horsetail ) and " Equisetum camtschatcense " ( Kamchatka horsetail ).
32.
The damming of streams, digging for marl, and quarrying have produced several large ponds containing, particularly in former marl pits, localised rafts of water horsetail " Equisetum fluviatile ".
33.
Unlike the modern horsetail " Equisetum ", " Calamites " had a unifacial vascular cambium, allowing them to develop wood and grow to heights in excess of 10 m.
34.
""'Equisetum thermale " "'is an extinct horsetail species in the family Equisetaceae described from a group of whole plant fossils including rhizomes, stems, and leaves.
35.
Growing underwater, they consist of a central stalk with whorls of branchlets, giving them a superficial resemblance to horsetails, species of the genus " Equisetum ", which are true land plants.
36.
Populations from northern Chile with very stout stems up to 3.5 cm diameter have sometimes been treated as a separate species " Equisetum xylochaetum ", but this is not widely regarded as distinct.
37.
The state's Cretaceous flora included six species of cycads, " Equisetum ", evergreens, six species of ferns, laurels, pomegranates, poplars, tulip trees, giant redwoods, and willows.
38.
The genus " Equisetum " as a whole, while concentrated in the non-tropical northern hemisphere, is near-Mexican giant horsetail, " E . myriochaetum " ), and allegedly even more.
39.
However, the leaves of " Equisetum " probably arose by the reduction of megaphylls, as evidenced by early fossil forms such as " Sphenophyllum ", in which the leaves are broad with branching veins.
40.
A number of plant species which are otherwise scarce or absent in the Bristol region are found in high concentrations on the North Somerset Levels, including Water Horsetail ( " Equisetum fluviatile " ), Skullcap and Fen Bedstraw.
