Black Iris

Black Iris

Taxobox
name = "Black Iris"


image_width = 240px
image_caption = Iris nigricans in Jordan
regnum = Plantae
divisio = Magnoliophyta
classis = Liliopsida
ordo = Asparagales
familia = Iridaceae
subfamilia = Iridoideae
tribus = Irideae
genus = "Iris"
subgenus = "Limniris"
section = "Limniris"
species = "I. chrysographes"
binomial = "Iris chrysographes"
binomial_authority = Dykes

Black Iris ("Iris chrysographes") is a plant species that belongs to the genus Iris. It is native to S China and Myanmar (Burma), growing in meadows, stramsides, hillsides and forest margins. The species was originally collected by Ernest Wilson in Sichuan in 1908.

Other irises known as the Black Iris include "Iris nigricans" which is the national flower of Jordan, "Iris petrana" which also grows in Jordan, and "Iris susiana".

Classification

Horticultural classification: Sino-Siberian Iris, Beardless Iris.

Description

Herbaceous perennial with creeping rhizomes. Leaves linear and grayish green, to 70 cm long. Flowering stems 25-50 cm, hollow. Flowers reddish violet to very dark violet, almost velvety black, 6-9 cm in diameter, outer tepals usually with golden yellow stripes. Deliciously fragrant. Flowers in June to July.

Cultivation

"I. chrysographes" is easily cultivated and requires a fertile soil which does not dry out during the growth period. Grow in full sun. Hardy to USDA zone 4. Propagation by seeds or division in the spring. Cultivars must be divided. For cooler areas plants do best if planted in the spring.

Cultivars

Some cultivars are grown, mainly "black" flowered clones under names as 'Black Beauty', 'Black Knight', 'Black' (syn. 'Black Form', an invalid name), 'Ellenbank Nightshade', [http://www.stauder.net/bildearkiv/Iris%20chrysographes.jpg'Stjerneskud'] and 'Kew Black'. [http://planteliste.net/slides/iris_chrysographes_rubella.html 'Rubella'] is purplish violet."Iris chrysographes" has been used in a number of hybrids with other species.

References

*Iris species database http://www.badbear.com/signa/signa.pl?Iris-chrysographes
*Flora of China http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200028158


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