Скачать или смотреть Red dead-nettle - Lamium purpureum - Akurtvítönn - Villijurt

Red dead-nettle - Lamium purpureum - Deadnettle - Mint Family – Lamiaceae - Akurtvítönn - Tvítönn - Rauðatvítönn - Nettla - Raudtvitann - Rød Tvetand - Raudonžiede notrele - Яснотка пурпурнвая - Jasnota purpurowa - Verev iminõges - Rote Taubnessel - Sarta panatre - Punapeippi - Though superficially similar to species of Urtica - thetrue nettles in appearance, it is not related and does not sting, hence the name "dead-nettle". Young plants have edible tops and leaves, used in salads or in stir-fry as a spring vegetable. If finely chopped it can also be used in sauces. Meðalhá planta (15–30 sm) með purpurarauðum blómum í blaðöxlunum. Blómgast í júní–júlí.

Tvítennur, Lamium, er ættkvísl um 50 tegunda í varablómaætt, Lamiaceae, með heimkynni í Evrópu, Asíu og Afríku. Þær eru margar skriðular og skuggþolnar og því góðar þekjuplöntur á skuggsælum stöðum. Lesa meira: https://gardaflora.wordpress.com/fjol...

Akurtvítönn finnst nokkuð oft inni í bæjum og í byggð, meðal annars á höfuðborgarsvæðinu, þótt ekki geti hún talist algeng. Blómin eru allmörg saman út frá blaðöxlunum. Krónan 10–15 mm á lengd, einsamhverf, purpurarauð, loðin að utan, varaskipt. Bikarinn klofinn í fimm flipa niður að miðju. Bikarfliparnir oddmjóir, nær striklaga, hærðir, gleiðir og útstæðir. Fræflar fjórir. Frævan með einum stíl og klofnu fræni. Líkist öðrum tvítönnum sem finnast við bæi og í kauptúnum sem slæðingar, með áþekk purpurarauð blóm. Varpatvítönn hefur kringluleitari blöð, þau efri stilklaus og feðma um stöngulinn. Garðatvítönn hefur nýrlaga laufblöð og hlutfallslega lengri bikarflipa. Lesa meira: http://www.ni.is/biota/plantae/anthop...

Ljósatvítönn - Lamium album
Gulltvítönn - Lamium galeobdolon
Dílatvítönn - Lamium maculatum
Varpatvítönn - Lamium amplexicaule

The zygomorphic flowers are bright red-purple, with a top hood-like petal, two lower lip petal lobes and minute fang-like lobes between. The corolla shows a line of hairs near the base of the tube. They may be produced throughout the year, including mild weather in winter. This allows bees to gather its nectar for food when few other nectar sources are available. It is also a prominent source of pollen for bees in March/April (in UK), when bees need the pollen as protein to build up their nest. It is often found alongside Henbit Dead-nettle (Lamium amplexicaule), which is easily mistaken for it since they both have similar looking leaves and similar bright purple flowers; they can be distinguished by the stalked leaves of Red Dead-nettle on the flower stem, compared to the unstalked leaves of Henbit Dead-nettle. See more: https://en.wikipedia.org/wiki/Lamium_...

Red dead-nettle is an annual, although it often overwinters. It likes airy soil, e.g. vegetable patches that have been well dug over. It doesn’t usually survive in the wild among other plants, but it can be very abundant on arable land. It does quite well as a weed: it can stand weed-killers quite well, it flowers for an exceptionally long time and it produces an abundance of seed. Its red flowers can often still be seen after light autumn frost, and as long as the soil doesn’t freeze it can flower right into the middle of a mild winter. There are many names for dead-nettles in Finland, and many of these cover all the species because they can be difficult to tell apart. Red dead-nettle is very like cut-leaved dead-nettle (L. hybridum). Red dead-nettle’s leaves are evenly shallow-toothed while cut-leaved dead-nettle is unevenly rough-toothed. Northern dead-nettle (L. confertum) differs from other red-flowered dead-nettles in that the lobes of its calyx are longer than the calyx-tube. The uppermost leaves of henbit dead-nettle (L. amplexicaule) are clearly amplexicaul. See more: http://www.luontoportti.com/suomi/en/...

There are three plants which usually arise and bloom in late winter and early spring. They tend to be confused in their identification since the flowers are similar in color, the leaves seem to be the same shape and size, and the height of the plants are nearly the same. Let’s look closely at each of these three plants and see how they are different — to make their identification more certain when you next encounter them. See more: http://identifythatplant.com/three-ea...