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Herb up to 3 m with stout, erect stems. Leaves large, oblong, acuminate. Flowers 10–13 cm. (4-5") long, honeysuckle-scented, borne in a short, terminal raceme; perianth tubular, the three outer petaloid lobes linear-oblong, convolute, reflexed, tinged green, the three inner ones straight and extended, recurved at end, white, tinted yellowish-green.
The following list is based on the Taxonomic revision of the family Cannaceae in the New World and Asia, by Tanaka [4] and the proposal to conserve the name Canna tuerckheimii over C. latifolia.
Canna cultivars are grown in most countries, even those with territory above the Arctic Circle, which have short summers, but long days, and the rapid growth rate of cannas makes them a feasible gardening plant, as long as they receive 6–8 hours of sunlight each day during the growing season and are protected from the cold of winter.
Cultivars, F1 and F2 hybrids, normally with small species-like flowers, but grown principally for their foliage. [2] [3] [4] This group has occasionally been referred to as the Année Group, after the originator, Théodore Année, the world's first Canna hybridizer.
E. robustus can reach 8–10 ft (2.4–3.0 m) in height with pink or white flower spikes E. stenophyllus , a dwarf species, reaches 2–3 ft (0.61–0.91 m) in height with yellow flowers. Also E . × isabellinus which is a hybrid of E. olgae and E. stenophyllus is available as 'Cleopatra', with orange spikes.
A floral formula then acquires a form like the following, typical of the lily family: K3 C3 A6 G(3) 3 ∞ which indicates that the flowers of this family have 3 sepals, 3 petals, an androcecium with 6 stamens and a gynoecium with a succulent ovary formed by 3 carpels joined, with three loculi and numerous ovules per locule.
It forms branched rhizomes 60 centimetres (24 inches) long [10] that are divided into bulbous segments and covered in two lines by pale green or purple flaky leaves. The very large grains of starch stored there can supposedly be seen with the naked eye. The plants form an upright, unbranched stem or the overlapping leaf sheaths form a pseudo ...
Canna 'Yellow King Humbert' Burbank is a medium sized Italian Group Canna cultivar; foliage green, but often variegated purple markings and occasionally whole leaves purple, oval shaped, spreading habit; oval stems, coloured green + purple; flower clusters are open, spotted, colours yellow with red spots, often large red markings and occasionally whole flowers red, staminodes are large; seed ...