Iris ruthenica

Iris ruthenica, sometimes called ever blooming iris (in the UK), Russian iris, pilgrim iris and Hungarian iris (in Europe), is a species in the genus Iris– subgenus Limniris. It is a rhizomatousperennial, with a wide distribution, ranging from eastern Europe to Central Asia. It has grass-like leaves, thick stem and violet or bluish lavender flowers which are marked with violet veining.

Species of flowering plant

Iris ruthenica
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Iridaceae
Genus: Iris
Subgenus: Iris subg. Limniris
Section: Iris sect. Limniris
Series: Iris ser. Ruthenicae
Species:
I. ruthenica
Binomial name
Iris ruthenica

Synonyms[1]
  • Iris alpinaPall. ex Roem. & Schult.
  • Iris caespitosaPall. ex Link
  • Iris humilisSchur [Illegitimate]
  • Iris nana(Maxim.) Nakai [Illegitimate]
  • Iris ruthenica f. leucanthaY.T.Zhao
  • Iris ruthenica var. nanaMaxim.
  • Iris ruthenica subsp. ruthenica(unknown)
  • Iris ruthenica var. ruthenica(unknown)
  • Iris ruthenica var. uniglumisSpach
  • Iris vernaPall. [Illegitimate]
  • Joniris ruthenica(Ker Gawl.) Klatt
  • Limniris ruthenica(Ker Gawl.) Fuss
  • Xiphion ruthenicum(Ker Gawl.) Alef.

. . . Iris ruthenica . . .

Iris ruthenica is very variable and hybrids can look very similar to Iris uniflora,[2] the other species in the Iris series Ruthenicae. It can be variable with its leaf length and width, and flower height.[3]

It has a creeping rhizome,[4][5][6] (about 3–5 mm in diameter) which is branched and has fibrous roots.[2] The creeping rhizome forms a clump or a grass-like tuft plant.[3][7][8]

It has bright green leaves,[6][7][8] or greyish green leaves.[2][5] That are tall and thin, and grass-like,[3][9][10] measuring between 10 – 40 cm (8–13 in) long and 2 – 6 mm wide.[2][3][7] The leaves can grow longer than the flower stem.[9]

The plant (stem and flowers) grows to a height of between 3–20 cm [4][11][2] (12 in).[8]

The thick stem is 2–3 cm wide,[9] can grow to heights of between 3–20 cm.[2][4][10] It has the remains of last years leaves at the base of the stem.[9]

It blooms in spring,[12] (between May, June and July in the UK),[8][11] or early to mid summer,[3] with one normally, but occasionally 2 fragrant flowers.[2][3][13]

The large flowers are between 3–5 cm in diameter,[2][3][7] with a cylindrical,[9]perianth tube measuring 0.5–1.5 cm long.[2][6] The flowers come in a range of blue shades between violet [2][3][11] and bluish lavender.[3][4][13] Which are marked with violet veining.[3][5][8] Like other irises, it has 2 pairs of petals, 3 large sepals (outer petals), known as the ‘falls’ and 3 inner, smaller petals (or tepals), known as the ‘standards’.[14] The falls (measuring 4.5–5 cm) are white.[6][8][13] The standards (measuring 4–6 cm) are almost erect.[2][7][6] The bracts (measuring 3–5 cm ) are greenish with pink margins,[6] violet blue stigma,[12] and milky white anthers.[2]

It has a globose (globe-like) to ovoid shaped seed capsule (measuring 1.2—1.5 cm) in June–August (after the flowering period is over).[2][9][15] Once they are ripe, the seed capsules fully open and all the seeds are dispersed in one movement. Unlike other iris species.[15] The seeds are pyriform (pear-shaped) and have an aril (white appendage on the edge of the seed).[2][7] The aril disappears soon after and shrivels up.[15]

. . . Iris ruthenica . . .

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. . . Iris ruthenica . . .

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