■ (SPEC) Iris rosenbachiana Regel

1884, Botanical author Regel

Iris rosenbachiana Regel (Eduard August von Regel, 1884, Turkestan); Subgenus Scorpiris . Juno; Color Code-S2L or W9; Rootstock a well developed bulb 1 ½ cm in diameter with short, thickened fusiform roots; Stem completely hidden by leaves; Leaves almost the same width throughout till they narrow at the apex; Flora of USSR says this is distinguishable from Iris nicolai whose leaves begin narrowing about midway; Leaves are subfalcate with narrow more or less scabrous margins; lower leaves 2-3 cm broad; Flowers arise at the same time as leaves and are carried well above them on perianth tubes 9-10 cm long; Falls 4-5.5 cm long; haft unwinged with margins turned downward; blade 17-22 mm, dark violet, with a central ridge undissected with entire margins is dark violet changing to yellow at back; on both sides of the ridge it is white with dark violet spots; Standards down turned 2 ½-3 cm long by 6-12 mm broad, oblong-obovate to obovate-obtuse or often emarginate; style crests 5-10 by 15-22 mm obliquely triangular, subacute to obtuse, crenate-dentate; stigmas shortly semicircular.Sweet fragrance

See below:

• * References
• * Chromosome counts
• * Synonyms
• * Variations
• * Hybrids
• * Distribution and Cultivation

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References:

Act. Hort. Petr. 8: 675. tab. 8 1884;
Gartenflora 35: 409. 1886, illustrated in color;
F.C.C., R.H.S. 1889, shown by Barr, Whitbourn; Hort. Dir. 31: 326. 1890;
Krel. 1890;
The garden. An illustrated weekly journal of horticulture in all its branches [ed. William Robinson], vol. 33: p. 558, t. 653, fig. 2 (1888)
Curtis's Botanical Magazine 116: tab. 7135. 1890,
Van T. 1900; 1909; Wal. 1919;

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Synonym

Rosenbach Iris . ----

Chromosome counts

2n=20 Gustafsson & Wendelbo 1975; 2n=46, Zakharjeva, 1990. ----

Iris rosenbachiana has the following cultivars; 'Albo-violacea' 'Harangon' 'Nicolai' ROSENBACHIANA COERULEA ROSENBACHIANA VIOLACEA 'Sina' 'Tovil-Dara' 'Varzob' ----

Hybrids

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Distribution & Cultivation

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Interested in Iris Species? Please visit the: Species Iris Group of North America website.

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-- BobPries - 2010-03-04