Iris ivanovae

Iris ivanovae is a plant species in the genus Iris and part of the subgenus Iris and in the section Pseudoregelia. It is a rhizomatous perennial, from eastern Russia, China, and Mongolia.

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It is similar in form to Iris tigridia but differs in the leaves, being narrower on Iris tigridia and Iris ivanovae having smaller flowers. It has a thick, dark grey rhizome that is about 2 – 4 mm in diameter. Below the rhizome, it has wrinkled dark grey secondary roots. The rhizome is covered in the remains of light brown or grey dead leaves. The radical leaves are light green, narrow, linear, with 2–3 prominent veins. They can grow up to between 10–25 cm (4–10 in) long, and 1–2.5 mm wide. It has a slender stem that can grow up to between 0.5–10 cm (0–4 in) tall. The stem has 2 green, narrow, lanceolate spathes (leaves of the flower bud) that are 2.5–4 cm (1–2 in) long and between 0.5 and 0.7 cm wide. The stems hold 1 terminal (top of stem) flower, blooming in early May. The flowers are 2.5–3.5 cm (1–1 in) in diameter, and come in shades of pink-purple. The flowers have dots and dashes markings. Like other irises, it has 2 pairs of petals, 3 large sepals (outer petals), known as the 'falls' and 3 inner, smaller petals (or tepals), known as the 'standards'. The falls are 5 cm (2 in) long, and 0.8–1 cm wide, with a beard of clavate hairs in the middle. They narrow to a thread-like claw (near to the stem). The standards are lanceolate, with a notch at the top of the petal. It has a triangular shaped ovary, a 1.5–2 cm long perianth tube that is between 0.5–1 mm in diameter, and yellow anthers. After the iris has flowered in late June and early July, it produces an oblong-oval seed capsule, which has a small nose or sprout. Inside the capsule are brown, wrinkled and reticulate (resembling a net) seeds. Biochemistry As most irises are diploid, having two sets of chromosomes, this can be used to identify hybrids and classification of groupings. It has a chromosome count of 2n=20 or 2n=40. Specimens from Chitinskaya Oblast in Russia, were found to have a chromosome count of 2n=20.