Iris sibirica 'Bennerup Blue' (Bennerup Blue Siberian Iris Iris Si)

Overview

Threatened

Common Names

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Common Names in English:

Bennerup Blue Siberian Iris, Bennerup Blue Siberian Iris Iris Si

Description

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Family Iridaceae

Herbs perennial (or shrubs or annuals ), with rhizomes, bulbs, or corms. Leaves alternate, often 2-ranked, often oriented edgewise to aerial stem, usually sword-shaped to linear , parallel veined, base sheathing . Inflorescence sometimes a spike or reduced to a solitary flower, more often of monochasial , umbellate cymes, each enclosed in 2 opposed bracts (spathes ) and termed a rhipidium, which may be solitary and terminal or numerous and variously arranged in racemes or panicles; bracts 1 to several. Flowers bisexual , showy, usually actinomorphic (often zygomorphic elsewhere) . Perianth segments 6, in 2 whorls, inner and outer ones equal or differing in size and/or color; tube filiform or trumpet-shaped. Stamens (2 or) 3; anthers extrorse . Ovary inferior (or superior), 3-loculed; ovules few to many; placentation axile . Style with filiform, slender, or petaloid branches. Fruit a loculicidal capsule. Seeds with or without aril and wings.

Between 70 and 80 genera and ca. 1800 species: nearly worldwide, especially S Africa, Asia, and Europe; three genera and 61 species (21 endemic, one introduced ) in China.[1]

Genus Iris

Herbs, perennial , from rhizomes [bulbs or fascicles of fleshy roots ]; rhizomes homogeneous with branches like primary in size and texture , or heterogeneous , branches cordlike with scalelike leaves, enlarging at apex to produce vegetative leaves, additional cordlike branches, and flowering stems. Flowering stems simple or branched, erect (declining or semierect and obviously zigzag in I. brevicaulis and some of its hybrids), solid or hollow, terete or slightly flattened. Leaves: basal 3-10, in fan; blade monofacial (except at base ), smooth or ridged , sometimes centrally thickened, veins obscure to prominent ; cauline 0-4 on branched stems, usually similar to basal, subtending each branch , decreasing in length distally, sometimes bracteiform and sheathing stem. Inflorescences rhipidiate, units 1 or more-flowered, spathaceous ; spathes 2, herbaceous with scarious tips , or completely scarious, with or without distinct keel , often persisting and enclosing capsule(s) at maturity. Flowers lasting 1-4 days, upward-facing, usually somewhat fragrant (odor extremely unpleasant in I. foetidissima), pedicellate or sessile; perianth epigynous , white, yellow, tan, brown, copper-red, maroon, blue, blue-violet, or purple, often with markings of contrasting colors, differentiated into sepals and petals, actinomorphic , 4-18 cm diam.; floral tube distal to ovary, terete or occasionally ridged, solid proximally, hollow distally; sepals 3, spreading or reflexed , expanding either gradually or abruptly from claw into broader limb, with signal of prominent ridge, crest , distinct lines or dots, pubescence , or band of multicellular hairs (beard ) along midline of claw and for short distance along midrib of limb; petals 3, erect, spreading or rarely reflexed, sometimes very reduced and mostly hidden by sepal bases; stamens opposite sepals, free but appressed to style branches; style dividing distally into petaloid branches, these arching outward and over stamens and claws of sepals, dividing at apex into 2 rounded or triangular lobes (style crests) ; stigma a lip of tissue on adaxial surface of style arm at base of crest; ovary terete or roundly 3- or 6-angled or -grooved. Fruits capsular , wall papery or becoming dry and hardened, sometimes indehiscent (in I. giganticaerulea) . Seeds 4-20, in 1-2 rows per locule, often flattened in contact with others, rounded on outer surface; seed coat tan to dark brown (red in I. foetidissima), thin, membranous, and smooth, or conspicuously roughened to extensively corky (usually in wetland species), with or without obvious aril. x = uncertain.

Species ca. 280: Northern Hemisphere.

Because irises have large, handsome flowers, have many different forms, colors, and color patterns , and are easily grown and propagated, they have become popular garden ornamentals . Many non-native irises may be found in the flora area, not only in specialized gardens, but in casual plantings and persisting around old dwellings, in cemeteries, and along roadsides. These include not only the more common bearded irises, but members of the Sibirian, Spuria, Japanese, and Dutch groups. In the Pacific Coast and southeastern areas of the flora, repeated hybridization, both natural and artificial, of some of the local species has produced hundreds of garden forms that have added greatly to the popularity of this genus. Asexual reproduction in many Iris species may be more important than sexual reproduction in their persistence , and many hybrid clones may persist for decades in sites no longer cultivated.

The species of Iris differ from members of other native genera of the Iridaceae in North America in three ways: 1) the sets of outer and inner perianth members (sepals and petals herein) differ from each other in shape , orientation, and, in some cases, coloration ; 2) the parts of the flowers��petals, sepals, stamens, and styles��are united basally into a floral tube that surmounts the ovary; and 3) the styles are petaloid and modified with some specialized structures to insure cross pollination .

T. Holm (1929) restricted the term rhizome to a horizontal, usually subterranean , stem that produces roots from its lower surface and green leaves from its apex, developed directly from the plumule of the embryo. He recognized stolons as axillary , subterranean branches that do not bear green leaves but only membranaceous , scalelike ones. The rhizomes of Iris are of two basic kinds: homogeneous, with the branches like the primary one in size and texture, and heterogeneous, with the branches of the primary rhizome like stolons with scalelike leaves. These enlarge at the apex to produce green leaves and more stolonlike branches.

According to B . Mathew (1990), Iris includes six subgenera . Species of subgenera Iris and Limniris are rhizomatous ; the others are either bulbous or perennial from a fascicle of fleshy roots. Three species of subg. Iris are sometimes found naturalized from cultivation in the flora area. Other species of the subgenus are found here only in cultivation or as waifs . The native North American species of Iris all belong to subg. Limniris, usually referred to as the beardless irises. The four other subgenera, which are found in the flora area only in cultivation or as waifs, have all been recognized sometimes as separate genera: subg. Nepalensis (Dykes ) Lawrence as Junopsis Schulze; subg. Xiphium (Miller) Spach as Xiphion Miller; subg. Scorpiris Spach as Juno Trattinnick; and subg. Hermodactyloides Spach as Iridodictyum Rodionenko. F. Köhlein (1987) accepted these four segregate genera; however, most current authors circumscribe Iris in the broad sense, as here.

Elevation is unimportant in the taxonomy and ecology of Iris, and very rarely is it recorded on specimen labels. Consequently, elevations are not reported in the species treatments that follow.[2]

Physical Description

Habit: Clumping

Flowers: Bloom Period: April, May. • Flower Color: Blue • Flower Conspicuous: Bearded , dutch Iris-like, drooping falls have dark veining

Foliage: Sword-like, blue-tinged • Foliage Shape: Strap-shaped • Normal foliage color: Green • Underside foliage: Green • Juvenile foliage: Green • Mature foliage: Green • New foliage: Green • Spring foliage: Green • Summer foliage: Green • Fall foliage: Green

Size/Age/Growth

Growth Rate: Moderate Growing • Size: Vigorous grower to 2 ft . tall, flower stalks taller. Clump forming.

Landscaping

Care: Follow a regular watering schedule during the first growing season to establish a deep, extensive root system. For a neat appearance , remove old foliage as new leaves emerge . Divide clumps every 4 to 5 years in early fall .

Biology

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Growth

Culture: Space 9-12" apart.

Soil: Minimum pH: 5.6 • Maximum pH: 7.5

Sunlight: Sun Exposure: Full sun

Moisture: Water Requirements: Keep surface of soil moist, but not soggy.

Temperature: Heat Zones: High: 9 (>120 to 150 days) Low:1 (< 1 days) (map) • Cold Hardiness: High:9 (20 to 30 F) Low:4 (-30 to -20 F) (map)

Taxonomy

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Domain: Eukaryota () - Whittaker & Margulis,1978 - eukaryotes
- Kingdom: Plantae () - Haeckel, 1866 - Plants
  - Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
    - Phylum: Tracheophyta () - Sinnott, 1935 Ex Cavalier-Smith, 1998 - Vascular Plants
      - Subphylum: Euphyllophytina ()
        Infraphylum: Radiatopses () - Kenrick & Crane, 1997
        Class: Liliopsida () - Scopoli, 1760
        Subclass: Liliidae () - Takhtajan, 1967
        Superorder: Lilianae () - Takhtajan, 1967
        Order: Iridales () - Dumortier, 1829
        Family: Iridaceae () - A.l. De Jussieu, 1789 - Iris Family
        Subfamily: Iridoideae ()
        Tribe: Irideae ()
        Genus: Iris () - Linnaeus, Sp. Pl. 1: 38. 1753; Gen. Pl. ed. 5, 24. 1754.
        Specific epithet: sibirica - Linnaeus
        Cultivar: Bennerup Blue
        Botanical name: - Iris sibirica 'Bennerup Blue'

Similar Species

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Members of the genus Iris

There are approximately 16024 species in this genus. Here are just 100 of them:

More Info

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Notes

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Contributors

Brands, S.J. (comp.) 1989-2006. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed April 19, 2007.

Identifiers

Zipcode Zoo Species Identifier: 710027

Footnotes

Yu-tang Zhao, Henry J. Noltie & Brian F. Mathew "Iridaceae". in Flora of China Vol. 24 Page 297. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
http://bugguide.net/index.php?q=search&keys=Iris&search=Search [back]

Iris sibirica 'Bennerup Blue'

Overview

Common Names

Description

Family Iridaceae

Genus Iris

Physical Description

Size/Age/Growth

Landscaping

Biology

Growth

Taxonomy

Similar Species

Members of the genus Iris

More Info

Further Reading

Notes

Contributors

Identifiers

Footnotes