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....Fundamentally this phenomenon seems related to a question of turgidity of the plant tissues and such a species presents this appearance when the air becomes dry and the plant starts to fade.
The reduction of parts by suppression is almost as frequently encountered as their multiplication. Fournier noted it as early as 1861 and Heinricher investigated most especially the transition to a bloom of Type 2 with 2 sepals, 2 petals, 2 stamens, 2 styles, and 1 ovary with two chambers, each piece essentially normally constructed.
....Petals are bare, or ornamented
with beards or crests, according to the Sections. Thus it is of
enormous interest botanically to observe the appearance of crests
recalling those of the Evansia Section upon the unguis
of Iris tauri, as did Miss Armitage, and of Iris siberica,
as observed at Verrières in 1906.
....Variegation of the flowers
is fairly rare in irises. Mottet nevertheless noted some speckled,
striped, and mottled Iris Kaempferi, and Miss Armitage
described a white Iris florentina with blue and white variegated
sepals, but solid colored petals, one blue, the others white.
....Among the garden irises, the
varieties Arlequin malinais and Victoire Lémon
generally have petals flecked in violet upon a nearly white foundation.
....Additionally, we have been informed of malformed sepals and petals, distorted or wrinkled as a result of their position in the bud, of forked petals, twisted, with a long filament inserted in the notch, of stamens transformed into long filamentous appendages, and of ovaries surmounted with a kind of stamen, or a part elongated into a thin strip.
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