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2. Equisetum arvense - Wikipedia

   en.wikipedia.org/wiki/Equisetum_arvense

   Equisetum arvense, the field horsetail or common horsetail, is an herbaceous perennial plant in the Equisetidae (horsetails) sub-class, native throughout the arctic and temperate regions of the Northern Hemisphere. It has separate sterile non-reproductive and fertile spore-bearing stems growing from a perennial underground rhizomatous stem

3. Equisetum hyemale - Wikipedia

   en.wikipedia.org/wiki/Equisetum_hyemale

   Equisetum hyemale (rough horsetail [2]) is an evergreen perennial herbaceous pteridophyte in the horsetail family Equisetaceae native to Eurasia and Greenland. It was formerly widely treated in a broader sense including a subspecies (subsp. affine ) in North America, but this is now treated as a separate species, Equisetum praealtum .

4. Equisetum giganteum - Wikipedia

   en.wikipedia.org/wiki/Equisetum_giganteum

   The stems are the stoutest of any horsetail, 1–2 cm diameter (up to 3.5 cm (1.33 inches) in diameter in some populations), [5] and bear numerous whorls of very slender branches; these branches are not further branched, but some terminate in spore cones. Unlike some other horsetails, it does not have separate photosynthetic sterile and non ...

5. Equisetidae - Wikipedia

   en.wikipedia.org/wiki/Equisetidae

   The plants have intercalary meristems in each segment of the stem and rhizome that grow as the plant gets taller. This contrasts with most seed plants, which grow from an apical meristem - i.e. new growth comes only from growing tips (and widening of stems). Horsetails bear cones (technically strobili, sing. strobilus) at the tips of some stems.

6. Equisetum fluviatile - Wikipedia

   en.wikipedia.org/wiki/Equisetum_fluviatile

   The green stems grow 50–150 cm tall and 2–8 mm thick. The leaf sheaths are narrow, with 15-20 black-tipped teeth. [2] Many, but not all, stems also have whorls of short ascending and spreading branches 1–5 cm long, with the longest branches on the lower middle of the stem.

7. Robots are helping restore lost seagrass meadows - AOL

   www.aol.com/news/robots-helping-restore-lost-sea...

   Weighing just about 23 kilograms (50 pounds), Grasshopper – adorned with pink skis, a few cameras and a lot of tech – can currently plant up to 60 seeds per minute and can hold up to 20,000 ...