Equisetum arvense L., Sp. Pl. 2: 1061 1753. (syn: Allostelites arvensis (L.) Börner; Equisetum alpestre (Wahlenb.) LandoltEquisetum arcticum Rupr.Equisetum arvense var. agreste (Klinge) BrauseEquisetum arvense f. agreste KlingeEquisetum arvense subsp. agreste (Klinge)Equisetum arvense f. alpestre (Wahlenb.) DöllEquisetum arvense subsp. alpestre (Wahlenb.) Arcang.Equisetum arvense var. alpestre Wahlenb.Equisetum arvense var. arcticum Rupr.Equisetum arvense f. arcticum (Rupr.) M.BrounEquisetum arvense var. arenicola GoiranEquisetum arvense f. atratidens LepageEquisetum arvense var. boreale (Bong.) Rupr.Equisetum arvense subsp. boreale (Bong.) Tolm.Equisetum arvense f. boreale (Bong.) Asch.Equisetum arvense f. caespitosum J.RousseauEquisetum arvense f. campestre (Schultz) MildeEquisetum arvense var. campestre (Schultz) Rupr.Equisetum arvense var. coaetaneum SchurEquisetum arvense subvar. decumbens G.Mey.Equisetum arvense var. decumbens HayneEquisetum arvense var. decumbens DöllEquisetum arvense f. decumbens W.D.J.KochEquisetum arvense f. diffusum (A.A.Eaton) CluteEquisetum arvense var. diffusum A.A.EatonEquisetum arvense var. duffortianum HyEquisetum arvense var. elatum SchurEquisetum arvense var. elongatum GrayEquisetum arvense var. erectum OpizEquisetum arvense var. erectum HayneEquisetum arvense var. fagetinum SchurEquisetum arvense var. frondescens DöllEquisetum arvense var. granulatum G.LawsonEquisetum arvense var. intermedium MildeEquisetum arvense var. irriguum MildeEquisetum arvense f. microstachyum A.A.EatonEquisetum arvense var. nanum A.Braun ex DöllEquisetum arvense f. nanum (A.Braun ex Döll) M.BrounEquisetum arvense var. nemorosum (A.Braun ex Döll) A.Braun & Engelm.Equisetum arvense var. nemorosum A.Br.Equisetum arvense f. nemorosum A.Braun ex DöllEquisetum arvense var. nudum Milde ex Farw.Equisetum arvense f. polystachyon (A.A.Eaton) M.BrounEquisetum arvense var. polystachyon A.A.EatonEquisetum arvense var. proliferum (Luerss.) Farw.Equisetum arvense monstr. proliferum Luerss.Equisetum arvense f. proliferum (Luerss.) M.BrounEquisetum arvense var. prostratum OpizEquisetum arvense f. pseudoalpestre Vict.Equisetum arvense f. pseudonemorosum B.BoivinEquisetum arvense var. pseudosilvaticum MildeEquisetum arvense f. pseudovarium Vict.Equisetum arvense var. ramosissimum SchurEquisetum arvense subsp. ramulosum (Rupr.) W.F.RappEquisetum arvense f. ramulosum (Rupr.) Klinge ex ScogganEquisetum arvense var. riparium (Fr.) MildeEquisetum arvense subsp. riparium (Fr.) NymanEquisetum arvense f. riparium (Fr.) Asch.Equisetum arvense var. robustum SchurEquisetum arvense var. serotinum G.Mey.Equisetum arvense subvar. serotinum G.Mey.Equisetum arvense var. serotinum (G.Mey.) A.Braun & Engelm.Equisetum arvense var. subalpinum SchurEquisetum arvense var. triangulare WatersEquisetum arvense var. varium MildeEquisetum boreale Bong.Equisetum calderi B.BoivinEquisetum campestre SchultzEquisetum duffortianum HyEquisetum nemorosum (A.Braun ex Döll) BellynckEquisetum pratense f. ramulosum (Rupr.) Asch.Equisetum pratense var. ramulosum Rupr.Equisetum riparium Fr.Equisetum saxicola Suksd.; Presla arvensis (L.) Dulac); 
Subarctic & Temp. Northern Hemisphere: Afghanistan, Alabama, Alaska, Albania, Alberta, Aleutian Is., Altay, Amur, Arizona, Arkansas, Austria, Azores, Baleares, Baltic States, Belarus, Belgium, British Columbia, Bulgaria, Buryatiya, California, Central European Rus, China North-Central, China South-Central, China Southeast, Chita, Colorado, Connecticut, Corse, Cyprus, Czechoslovakia, Delaware, Denmark, District of Columbia, East European Russia, Finland, France, Føroyar, Georgia, Germany, Great Britain, Greece, Greenland, Hungary, Iceland, Idaho, Illinois, India, Indiana, Inner Mongolia, Iowa, Iran, Iraq, Ireland, Irkutsk, Italy, Japan, Kamchatka, Kansas, Kazakhstan, Kentucky, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Kriti, Krym, Kuril Is., Labrador, Magadan, Maine, Manchuria, Manitoba, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Mongolia, Montana, Nebraska, Nepal, Netherlands, Nevada, New Brunswick, New Hampshire, New Jersey, New Mexico, New York, Newfoundland, North Carolina, North Caucasus, North Dakota, North European Russi, Northwest European R, Northwest Territorie, Norway, Nova Scotia, Nunavut, Ohio, Oklahoma, Ontario, Oregon, Pakistan, Pennsylvania, Poland, Portugal, Primorye, Prince Edward I., Qinghai, Québec, Rhode I., Romania, Sakhalin, Sardegna, Saskatchewan, Sicilia, South Carolina, South Dakota, South European Russi, Spain, Svalbard, Sweden, Switzerland, Tadzhikistan, Tennessee, Texas, Tibet, Transcaucasus, Turkey, Turkey-in-Europe, Turkmenistan, Tuva, Ukraine, Utah, Uzbekistan, Vermont, Virginia, Washington, West Himalaya, West Siberia, West Virginia, Wisconsin, Wyoming, Xinjiang, Yakutskiya, Yugoslavia, Yukon as per POWO;

Equisetum arvense, the field horsetail, common horsetail or Mare’s tail is a herbaceous perennial plant, 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 system. The fertile stems are produced in early spring and are non-photosynthetic, while the green sterile stems start to grow after the fertile stems have wilted, and persist through the summer until the first autumn frosts.
The sterile stems are 10–90 cm tall and 3–5 mm diameter, with jointed segments around 2–5 cm long with whorls of side shoots at the segment joints; the side shoots have a diameter of about 1 mm. Some stems can have as many as 20 segments. The fertile stems are succulent-textured, off-white, 10–25 cm tall and 3–5 mm diameter, with 4–8 whorls of brown scale leaves, and an apical brown spore cone 10–40 mm long and 4–9 mm broad.
It has a very high diploid number of 216 (108 pairs of chromosomes).
The specific name arvense is derived from the Latin arvensis, meaning “from the meadow, field or grassland.”
(From Wikipedia on 25.6.14)


Balanophora involucrata Hook.f. & Thomson : 3 posts by 2 authors. Attachments (2 + 2)

Please find attached files.
Balanophora involucrata
Hook.f. & Thomson
Location: Spiti valley, Lahaul Spiti, Himachal Pradesh, India
Altitude: 3515m (sml)
Lat Long: 32°18’4.38″N, 77°25’10.94″
Habitat: Found parasitic to Rhododendron campanulatum roots.

Never seen a photograph.  Thanks for sharing.

While inserting images of Balanophora species in eFI I found these two images mentioned as B.involucrata. To me these requires rethinking of ID. These resembles to Equisetum arvense cones (strobilus), a species known at this altitude in the Himalaya. Please see
My opinion is also based on the second picture in which some green young shoots of Equisetum are emerging from the soil just at the base of right cone bearing stems. Please see attached image.

In link mistakenly identified as Balanophora involucrata, I thank … for finding the error. Yes, this is Equisetum arvense.

even the brown things are reminiscent of horsetail shoots after flowering// in drying conditions   in addition to the young shoots emerging that … pointed out. Thanks …
not this sp. but the horsetail is a popular garden plant in sw usa
flowering tops become very common sites all over the neighborhoods…
called flowers of horsetail..strobilus …

Equisetum arvense submission : 7 posts by 5 authors. Attachments (6)
Equisetum arvense
Field Horsetail
Family – Equisetaceae
Habitat – In nearly dry agriculture Pea fields.
Photographed in Thachi Valley, Mandi District, Himachal Pradesh
Altitude – 2800 metres asl
Dated – 15 April 2019

well done photography. of even spars growth. i like it a lot

Yes, that’s right – typical achlorophyllous fertile shoots and you can see the single sheath-ridges of arvense rather than E. diffusum.  Those two species are closely related and arvense seems to be an adaptation of the aggregate to northern climates. They may well be best treated as subspecies.

Help for ID of Balanophora sp.
Recorded from Lahaul valley from Himachal
Date: 2nd May 2010

I think not Balanophora but rather fertile branches of a heteromorphic species of Equisetum, a pteridophyte.

Look like some Equisetum species

arvense not arvensis

The name of plant is Equisetum arvense L. as per the Catalog of Life: 2009 Annual Checklist.

Yes that is what I wrote. They go with genera

-um arvense

-is, -a, -us-, -pogon arvensis

Equisetum arvense Linnaeus, Sp. Pl. 2: 1061. 1753.
Field horsetail, common horsetail,
Aerial stems dimorphic; vegetative stems green, branched, 2–60(–100) cm; hollow center 1/3–2/3 stem diam. Sheaths squarish in face view, 2–5(–10) × 2–5(–9) mm; teeth dark, 4–14, narrow, 1–3.5 mm, often cohering in pairs. Branches in regular whorls, ascending, solid; ridges 3–4; valleys channeled; 1st internode of each branch longer than subtending stem sheath; sheath teeth attenuate. Fertile stems brown, lacking stomates, unbranched, shorter than vegetative stems, with larger sheaths, fleshy, ephemeral. 2 n =ca. 216.


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