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Iris × germanica grows up to 120 cm (47 in) high and 30 cm (12 in) wide. [5] The roots can go up to 10 cm (3.9 in) deep and it is a rhizomatous perennial that blooms mid to late spring. Hundreds of cultivars exist representing nearly every colour from jet black to sparkling whites and red. [ 6 ]
In his book, 'The Iris' in 1981, Brian Mathew, re-classified the iris as Iris germanica 'Florentina'. [23] [25] [39] This later became Iris germanica nothovar. florentina. It was verified by United States Department of Agriculture and the Agricultural Research Service on 19 October 1994, then updated on 12 September 2005, as Iris germanica L ...
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Iris croatica is a bearded rhizomatous species of iris (subgenus Iris) ... Brian Mathew in his book 'The iris', reclassified it a synonym of Iris germanica. [1] [7] [8]
Iris tridentata is a species in the genus Iris, it is also in the subgenus Limniris and in the series Tripetalae. It is a rhizomatous perennial , from the Southeastern United States. It has a cord-like rhizome, bright green leaves, long stem and fragrant flowers in spring in shades of blue.
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Giardino dell'Iris is a botanical garden specializing in the cultivation of iris flowers, symbol of Florence since 1251. It is located on the corner of Viale dei Colli and Piazzale Michelangelo in Florence , Italy , and open daily without charge from May 2–20 every year.
It is often confused with Iris trojana (now classed as a synonym of Iris × germanica) and Iris cypriana. [1] It is also similar in form to Iris cypriana but outer bract (spathe) is brown and papery in the upper third only. [2] It is a geophyte, [3] that has thick rhizomes, [4] [5] which are stoloniferous, and semi-buried in the ground. [1]