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Iris forrestii. Iris subg. Limniris. Limniris forrestii (Dykes) Rodion. Iris forrestii is a species of flowering plant in the genus Iris, also the subgenus Limniris and in the series Sibiricae. It is a rhizomatous herbaceous perennial, from China (including Tibet) and Burma. It has linear grassy-like leaves, long thin stem and fragrant yellow ...
Iris wilsonii will tolerate temperatures of up to – 15 degrees C. But may survive lower if protected or well mulched in winter. It is hardy to USDA Zone 6–8, and Zone H2 (which means Hardy to -15 to-20oC (5 to -4oF ), in Europe. It prefers soils with a ph level of 5.5 to 7 (acidic to neutral) and more moisture tolerant.
Iris giganticaerulea (the giant blue iris) is the largest species of the Louisiana irises. [2][3] It has very large green rhizomes, which are between 5 and 12 inches (13 – 30 cm) long and 0.75 to 1.5 inches (2–4 cm) thick. [4][5] They are shallow rooted, marked with the scars (of the previous seasons) leaves, with many branches, which can ...
Division (horticulture) Division, in horticulture and gardening, is a method of asexual plant propagation, where the plant (usually an herbaceous perennial) [ 1] is broken up into two or more parts. Each part has an intact root and crown. [ 2] The technique is of ancient origin, and has long been used to propagate bulbs such as garlic and saffron.
Iris himalaica Dykes. Limniris clarkei (Baker ex Hook.f.) Rodion. Iris clarkei is a species in the genus Iris, also the subgenus of Limniris and in the series Sibiricae. It is a rhizomatous herbaceous perennial, from Asia, including north east India, Nepal, Tibet, Bhutan, Burma and in China. It has grey-green leaves, long and thin green stem ...
As most irises are diploid, they have two sets of chromosomes.This fact can be used to identify hybrids and classification of groupings. [16] It has a chromosome count: 2n=42, [2] [22] [18] It has been counted several times. 2n=42, differing from some other Louisiana Iris species, so hybrids from crossing with those other species should have an odd number of chromosomes, for example, an Iris ...
The iris should be planted in well prepared ground (with added compost or organic matter). They should be planted 3–5 cm (1–2 in) below the ground level. They then need to be watered, and kept moist for the next few days, to prevent wilting and transplant shock. They should be spacing at 45–60 cm (17.5–23.5 in) apart.
Despite their loud, aggressive-sounding buzzing and red-eyed, rather frightful appearance, the periodical cicadas due to emerge en masse this spring in Illinois do not pose a threat to humans ...
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