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Melanin is yellowish to dark hazel in the stromal pigment cells, and black in the iris pigment epithelium, which lies in a thin but very opaque layer across the back of the iris. Most human irises also show a condensation of the brownish stromal melanin in the thin anterior border layer, which by its position has an overt influence on the ...
Iris chrysographes is a clump-forming herbaceous perennial with creeping rhizomes.The leaves are linear and greyish green, and up to 70 cm (28 in) long. The hollow flowering stems, 25–30 cm (9.8–11.8 in) long, bear slightly scented flowers in early summer.
Iris is a flowering plant genus of 310 accepted species [1] with showy flowers.As well as being the scientific name, iris is also widely used as a common name for all Iris species, as well as some belonging to other closely related genera.
Iris atrofusca (Judean iris or Gilead iris) is a species in the genus Iris, where it is placed in the subgenus Iris and the section Oncocyclus. It is a rhizomatous perennial from the deserts of Israel/Palestine and Jordan. The species has long falcate (sickle-shaped) or ensiform (sword-shaped) leaves, a long thick stem and large fragrant ...
Iris paradoxa is a species of flowering plant native to western Asia. It has large upright petals and smaller lower petals, which is unique amongst most iris forms. They come in various shades from white, lavender, mauve, medium purple, violet, dark purple to black. It has a black or purplish black beard on the lower petals.
In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in the iris pigment epithelium (located on the back of the iris), the melanin content within the iris stroma (located at the front of the iris), and the cellular density of the stroma. [4]
It contains the best-known genus - Iris. The members of this subfamily are widely distributed worldwide. They grow in all continents except Antarctica. Iris milesii. They produce typical sword-shaped leaves and have mainly corms or rhizomes. There are some exceptions which have bulbs. These are two subgenera of Iris - Xiphium and Hermodactyloides.
Iris swensoniana is a species in the genus Iris, it is also in the subgenus of Iris and in the Oncocyclus section. It grows in the deserts of Syria. It grows in the deserts of Syria. It has blue-green curved leaves, tall stems holding purple-black or purple blooms with a yellow beard and maroon-black signal patch.
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