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They sent the seed back to America and members of the American Iris Society (who had sponsored the expedition), who started propagating the seeds. [7] It was found that Iris typhifolia blooms weeks earlier than the other members in the sibirica group. [7] Iris typhifolia is a 'tentatively accepted' name of the RHS. [17]
The green seed capsules, which remain attached to the plant throughout the winter, are 5–8 cm (2–3 in) long; and the seeds are scarlet. It is known as "stinking" because some people find the smell of its leaves unpleasant when crushed or bruised, [1] an odour that has been described as "beefy". Its common names of 'gladdon' and 'gladwyn' or ...
The iris seed is not hard to raise but a very slow process. [33] It can take many months to germinate (between 3–12 months) with a 50% germination average. [14] They then can take 3–5 years before reaching flowering stage. [33] Seeds should be harvested from the plant after flowering but they must be from mature seed pods.
To grow from seed, allow the mature pods to dry on the plant. Then break open to collect seeds and the direct sow outdoors in fall or autumn. [10] [11] [19] [20] The seed should germinate within three months, if they have been pre-chilled for four weeks or placed outdoors over winter.
After allowing the seed pods to dry on plant, break open capsules to collect seeds. [12] Known germination tip: soak the seeds. Place in warm water until seeds swell, usually between 24 and 48 hours. Then remove floaters (these will not germinate) and the water can be re-used for soaking. [6]
The iris can also be grown from seed, allow the mature pods to dry on the plant. Then break open to collect seeds and the direct sow outdoors in fall or autumn. [11] [26] The new plants are planted with the top of the rhizome, 3–5 cm (1–2 in)below the soil surface. [10]
Iris is a flowering plant genus of 310 accepted species [1] with showy flowers. ... "A reclassification of Iris species bearing arillate seeds".
Irises can generally be propagated by division, [35] or by seed growing. [29] It was found that the force required to break seed coat is 133.2 MPa (Blumenthal et al., 1986). [36] Blumenthal et al. (1986) found different germination rates among species, from 1% to 60% seed germination in the first year for Iris lortetii Barbey and Iris atropurpurea.
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