Iris pallida subsp. cengialti

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Iris pallida subsp. cengialti
Iris pallida ssp. cengialti PID1626-2.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Iridaceae
Genus: Iris
Species:
I. pallida
Subspecies:
I. p. subsp. cengialti
Trinomial name
Iris pallida subsp. cengialti
Synonyms [1]
  • Iris cengialtiAmbrosi ex A.Kern.
  • Iris italica var. cengialti(Ambrosi ex A.Kern.) Nyman

Iris pallida subsp. cengialti is a subspecies in the genus Iris , it is also in the subgenus Iris . It is a rhizomatous perennial, from Italy and (part of the former country of Yugoslavia) Slovenia. It has yellowish-green, glaucous, lanceolate or ensiform leaves, tall stem, green flushed with purple spathes, 2 short branches, 2–3 scented flowers, in shades of violet, blue-violet, deep purple, blue-purple, deep blue-purple, pale purple, deep blue, to mid-blue. It has a yellow or orange tipped beard. It was originally published as Iris cengialti but then re-classified as a subspecies of Iris pallida , and known as Iris pallida subsp. cengialti, but it is often still called Iris cengialti. It is cultivated as an ornamental garden plant in temperate regions.

Contents

Description

It has a long, [2] [3] stout, [4] fleshy, light-coloured (underground) rhizome. [2] That is 1–3 cm wide (in diameter), [2] [3] and has long secondary roots. [3] It forms creeping plants. [4]

It has yellowish-green, [4] [5] lanceolate, [2] or ensiform (sword-shaped), [4] leaves, that are glaucous. [4] [6] The basal leaves, [3] can grow up to between 15 and 50 cm (6 and 20 in) long, and about 1.3 cm wide. [2] [4] [5] The herbaceous leaves (die in the winter), [4] sheath the stem. [2] [3]

It has a round (in section) stem, [2] [3] or peduncle, that can grow up to between 30 and 45 cm (12 and 18 in), [7] [8] [9] or 20–60 cm (8–24 in) tall. [2] [10] The stems are taller than the leaves, [4] [5] and at higher levels on the mountains, the plants are shorter. [6] It is also shorter than Iris pallida. [11]

The stem has glaucous green and ensiform spathes (leaves of the flower bud). [3] They are slightly flushed with purple, [5] and before flowering, they become pale brown, [6] (scarious) membranous, [4] and papery, [5] They are 2.5 cm long, [4] and between 2 and 4 cm (1 and 2 in) wide. [3]

It has 2 short branches (or pedicels). [4] [5] The stems (and the branches) hold between 2 and 3 flowers, [3] [4] [11] It can have up to 6 flowers, [8] but normally has 3 flowers, [5] in spring, between April and June, [3] or May, [12] to July. [10]

The small, [6] scented flowers, [3] [8] are 6–8 cm (2–3 in) in diameter, [2] come in shades of blue, from violet, [11] blue-violet, [2] [8] [13] deep purple, [14] blue-purple, [3] [4] [15] deep blue-purple, [7] [9] [16] pale purple, [3] deep blue, [10] to mid-blue. [17]

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'. [2] [3] [18] : 17  The falls are obovate or cuneate shaped, [3] [4] they are 5–8.6 cm (2–3 in) long and 2.5–3.4 cm (1–1 in) wide. [3] [4] In the centre of the falls, is a short, [5] (16–30 mm, [3] ) thick row of small hairs (the beard), which is yellowish-white, [2] [3] [7] bright yellow, [16] or white with orange tips. [4] [5] [9] The standards are a similar size to the falls. [4]

It has 2.5 cm long style branch, that is paler than the falls and standards, and has deltoid crests. [4] It also has a six grooved, ellipsoid ovary, [5] and a 0.6–0.8 cm long perianth tube. [4] [5]

After the iris has flowered, it produces an ovoid seed capsule, that is 3–4 cm (1–2 in) long and 1 cm wide, with 3 sections, which contain 15–20 oval grey or yellowish seeds. [2] [3]

Genetics

In 1956, a karyotype analysis was carried out on 40 species of Iris, belonging to the subgenera Eupogoniris and Pogoniris. It found that 24-chromosome tall bearded species could be divided into 3 karyotypes of Iris pallida. Iris kashmiriana has 2 pairs of median-constricted marker chromosomes, Iris illyrica , Iris cengialti, and Iris imbricata , lastly Iris variegata , Iris reginae (later classified as a synonym of Iris variegata), and Iris perrieri all have no median-constricted chromosomes. [19]

As most irises are diploid, having two sets of chromosomes, this can be used to identify hybrids and classification of groupings. [18] : 18  It has a chromosome count: 2n=24. [20]

Taxonomy

It is commonly known as 'Iris del Cengio', [2] 'Monte Cengio iris'. [3] [12] [21]

In Italy, it is known as 'Giaggiolo del Cengio Alto'. [22] In Slovenia, it is known as 'Bohinj Iris', [10] [23] [24] or 'Bòcje of lof'. [2] In German, it is known as 'Rovereto Schwertlilie'. [25]

It is sometimes misspelt as Iris cengualti. [26]

The Latin specific epithet cengialti refers to a mountain or large hill 'Mount Cengialto' (also known as Monte 'Cengio Alto', [3] [27] ), close to the town of Rovereto, in northern Italy. [28] [29] Confusingly, another mountain near Arsiero in the province of Vicenza (Veneto), is also known as Monte Cengio Alto. [3]

It was found by Francesco Ambrosi in 1854, [17] on Monte Cengialto, [4]

It was then published as Iris cengialti by Ambrosi in Flora del Tirolo Meridionale Vol.1 (Fl. Tirolo Mer.) on page 643 in 1854, [30] then fully published and described by A. Kerner in Österreichische Botanische Zeitschrift (Oesterr. Bot. Z.) Vol. 21, No.9, on pages 225–231 in September 1871. [5] [31] [32] A. Kerner was then assigned the author of the name Iris cengialti, previously ascribed to Ambrosi. [33]

Iris pallida, Iris cengialti and Iris illyrica are all considered closely related but often given different taxonomic rank (by various authors Kerner, 1871; Ambrosi, 1854; Foster, 1886; Tommasini, 1875; Pampanini, 1909; Lausi, 1964; Mathew, 1981; Colasante, 1995: Terpin et al., 1996). [34]

In May 1886, Sir Michael Foster noted in Gardeners' Chronicle on pages554 and 555, that it had similarities with Iris pallida. [4] [5] William Rickatson Dykes in his book in 'Handbook of Garden Irises' in 1914, suggested that Iris cengialti and Iris pallida were connected and should be merged under Iris pallida. [6] In 1939, Brian Mathew considered it to be a subspecies of Iris pallida. [5]

Then in Giorn. Bot. Ital. Vol.130 on page575 in 1996, Iris cengialti was classified as a synonym of Iris pallida subsp. cengialti. [29] [33]

It is normally classified as Iris pallida subsp. cengialti, [2] [17] [35] and thought to be a naturally occurring hybrid. [17]

In Slovenia, a form of the plant is called Iris cengialti vochinensis, [23] or Iris pallida subsp. cengialti f. vochinensis. [24]

probably of Asia Minor origin, [13]

It was verified as Iris pallida subsp. cengialti by United States Department of Agriculture and the Agricultural Research Service on 27 February 2002, and then updated on 1 December 2004. [29]

It is listed in the Encyclopedia of Life, [36] and listed on the Catalogue of Life as Iris pallida subsp. cengialti. [37]

Distribution and habitat

Iris pallida ssp. cengialti, seen in Slovenia Iris pallida ssp. cengialti PID1626-1.jpg
Iris pallida ssp. cengialti, seen in Slovenia

It is native to Europe.

Range

It endemic in the alpine region, [2] [12] [26] on the Dolomites (mountain range). [38]

It is found in north east Italy, [7] [11] [20] (within the region of Trentino, [39] and Veneto) [15] [21] and (part of the former Yugoslavia), [8] [13] in Slovenia, [7] [9] [15] (within the regions of Bohinj. [20] and Istria). [25]

In Trentino, it has found on Monte Zugna (south of Rovereto), [40] and Mount Brione. [28] In Veneto, it can be found on Mount Summano, [15] in the province of Belluno. [21]

Habitat

It grows on the rocky mountain sides, [3] [10] [12] on scree, [2] in meadows, [2] [12] [24] and dry grasslands. [3] Usually on karst, [2] or limestone soils. [3]

They can be found at an altitude of 200–1,600 m (660–5,250 ft) above sea level. [2] [3] [12]

They can found in the Dolomites, with other plants including; alyssum ovirense , androsace villosa , centaurea haynaldii , crepis froelichiana subsp. dinarica , eritrichium nanum , euphorbia kerneri , geranium argenteum , leontodon berinii , lilium carniolicum , potentilla incana and thlaspi minimum . [38] They also grow in the Belluno forests of Acer pseudoplatanus (Mount Maple) and Tilia platyphyllos (Lime tree) with other geophytes and Leontodon tenuiflorus (Dandelion insubrico), Knautia persicina , Globularia nudicaulis and Paeonia officinalis (Wild Peony). [21] In Slovenia, in Bohinj, it grows in meadows with another rare plant, Linnaea borealis (twinflower). [24]

Conservation

It is a rare plant, [15] although locally it is abundant on the mountains, [12] growing in masses, hanging onto relatively steep slopes. [28]

In Italy, it is listed as a protected species of regional interest (Annex B, LR 9/2007, Art. 96), and would be classed as 'vulnerable' on the IUCN Red List. [2] [3]

Cultivation

Seen at the Botanischer Garten Munchen-Nymphenburg in Munich, Germany Iris cengialti - Botanischer Garten Munchen-Nymphenburg - DSC07692.JPG
Seen at the Botanischer Garten München-Nymphenburg in Munich, Germany

It is hardy to 0 °C. [16]

It prefers could grown in rich (in fertile loan, [16] ), well drained soil in full sun. [11] [16]

It can be grown the rock garden. [11]

It is generally not attacked by pests and diseases. [11]

A herbarium specimen can be found at the Museum National d'Histoire Naturelle in Paris. [39]

Propagation

Irises can generally be propagated by division. [41] They should be lifted every three or four years, after the flowers are over. The tuber can be divided, with the dead roots trimmed and removed. The remains can then be replanted in enriched soil (with added compost). The leaves should be cut back to half their length, to prevent wind rock. [11]

Hybrids and cultivars

It has been used in hybridizing (or breeding programmes), and the hybrids that have Iris cengialti as a parent, can have multiple flowers, on average between 5 and 8. The branches are generally short on slender stems. [42]

Toxicity

Like many other irises, most parts of the plant are poisonous (rhizome and leaves), if mistakenly ingested can cause stomach pains and vomiting. Also handling the plant may cause a skin irritation or an allergic reaction. [43]

Related Research Articles

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<i>Iris pallida</i> Species of flowering plant

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<i>Iris variegata</i> Species of flowering plant

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<i>Iris spuria <span style="font-style:normal;">subsp.</span> maritima</i> Subspecies of flowering plant

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<i>Iris aphylla</i> Species of plant

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Iris alexeenkoi is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from the Caucasus mountains in Azerbaijan. It has green or greyish grass-like leaves, a short slender stem and 1–2 flowers that come in shades of purple, violet, purple-blue, or blue. It is closely related to Iris pumila. It is rarely cultivated as an ornamental plant in temperate regions.

Iris benacensis is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from Italy. It has similar sized leaves and stem, and blue-purple shaded flowers, that have a white, blue and yellow beard. It was once classified as a synonym of Iris aphylla, before being re-classified as a species in its own right, although some sources still call it a synonym. It is cultivated as an ornamental plant in temperate regions.

Iris cypriana is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from Cyprus. It has narrow, glaucous and evergreen leaves, tall slender stem, with 2–3 branches, and 1–3 large flowers in lavender, lilac, red-lilac, to dark purple shades. It is cultivated as an ornamental plant in temperate regions. It is listed in some sources as a synonym of Iris germanica.

Iris hellenica is a plant species in the genus Iris and the subgenus Iris. It is a rhizomatous perennial, from Saitas Mountain, in the Peloponnese Region of Greece. It has grey-green, sickle-shaped leaves, a tall slender stem, 2–3 white, lavender-blue, lilac or purple flowers and orange/purple beards. It was thought once to be a hybrid species of Iris germanica which also grows in the same area, before being separated into 2 species. It has only recently been published and is rarely cultivated as an ornamental plant in temperate regions.

<i>Iris imbricata</i> Species of plant

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<i>Iris junonia</i> Species of plant

Iris junonia is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from Cilicia, within the Taurus Mountains. It has glaucous short leaves, tall stems with several branches, numerous flowers in various colours from blue-purple, lavender, pale blue, cream, white and yellow, with brown veining and white tipped orange beards. It is cultivated as an ornamental plant in temperate regions. Its status is still unclear, if it is a synonym of Iris germanica or a separate species.

<i>Iris marsica</i> Species of plant

Iris marsica is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from the Apennine Mountains, in Italy. It has glaucous, sickle-shaped or curved, light green leaves, slender stem with 2 branches, and 3 violet, light blue violet, dark violet, and dark purple flowers. It was only found and described since 1973, and is not yet in general cultivation. It was once thought to be a form of Iris germanica, but has different morphological characteristics and different chromosomal differences.

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<i>Iris pallida <span style="font-style:normal;">subsp.</span> illyrica</i> Species of plant

Iris pallida subsp. illyrica, synonym Iris pseudopallida, is a subspecies of Iris pallida. It is a rhizomatous perennial from Croatia. It has flat, curved of sickle-shaped leaves, tall slender stems, 3–8 fragrant flowers, in shades of violet, or pale violet flowers, mauve, lavender, purple, yellow or white, between May and June. The iris was originally thought to be a separate species, but later classified as subspecies of Iris pallida, although in Croatia, it is still known as Iris pseudopallida. It is cultivated as an ornamental plant in temperate regions, especially in the Balkan regions.

Iris relicta is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rare rhizomatous perennial, from the mountains of Italy. It is medium-sized, with purple flowers and white beards. It is rarely cultivated as an ornamental plant in temperate regions. It has had a confusing history, once thought as a variety of Iris germanica, then as a separate species with a name shared with another bearded iris. It has only been sorted out since 1996.

Iris setina, the iris of Sezze, is a species in the genus Iris, it is also in the subgenus of Iris. It is a rhizomatous perennial, from a small region in Italy.It has glaucous sword-like leaves, slender branched stem, and one or two violet toned flowers. It is not yet cultivated as an ornamental plant in temperate regions.

<i>Iris subbiflora</i> Species of plant

Iris subbiflora is a plant species in the genus Iris, it is also in the subgenus Iris. It is a rhizomatous perennial, from Portugal and Spain in Europe. It has evergreen broad leaves, forming dense clumps, it has dwarf stems in late spring,, with 1 upright fragrant flower, in shades of purple, light red purple, grey-blue, blue-violet, or dark violet. It has a beard which is generally blue, purple, or violet, but can fade to white, dull yellow, or dark yellow. After being found in 1804, it was once a separate species until the late 70s, when it was reclassified as subspecies of Iris lutescens, and renamed Iris lutescens subsp. subbiflora. But in the 80s it was returned to an independent species but some authors and references still class the species as a synonym or subspecies. It is cultivated as an ornamental plant in temperate regions.

Iris camillae is a species in the genus Iris, it is also in the subgenus Iris and in the section Oncocyclus. It is a rhizomatous perennial, from Azerbaijan. It has narrow, falcate (sickle-shaped) leaves, medium-sized stem and large flowers, where the flower colour is very variable, ranging from violet, purple, pale blue, and also yellow, and occasionally bi-colour forms are found. It has a yellow beard. It is rarely cultivated as an ornamental plant in temperate regions, due to its environmental conditions of its natural habitat.

References

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  41. ↑ "How to divide iris rhizomes". gardenersworld.com. Retrieved 12 October 2015.
  42. ↑ Benjamin Yoe Morrison Garden Irises (1926) , p. 40, at Google Books
  43. ↑ David G Spoerke and Susan C. Smolinske Toxicity of Houseplants , p. 236, at Google Books

Sources

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