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The majority of insect pests on canna plants can be sprayed with a 70% isopropyl alcohol mist—diluted slightly—applied during non-sunny periods, as the alcohol may cause sunburn on the plant. Other effective options include insecticidal soap , neem and horticultural oils , and other commercially available spray treatments.
In order to introduce colours to the large white calla lilies, like the many colours available in the dwarf summer calla lilies, attempts have been made to hybridise Z. aethiopica with Z. elliotiana. These have resulted in albino progeny, which are non-viable. [citation needed]
Zantedeschia are relatively hardy plants, but some are more winter-hardy than others. In this regard there may be considered two groups, a hardy outdoor group with large white flowers (arum lilies) and less hardy group with white-spotted leaves and flowers in many colours (calla lilies), such as yellow, orange, pink and purple. [17]
Georgia O'Keeffe, Red Canna, 1919, High Museum of Art, Atlanta. Painted in oil on a 13 in × 9 + 1 ⁄ 2 in (33.0 cm × 24.1 cm) board, the red canna lily framed by green and dark yellow background colors at the top and right of the painting and dark blue at the bottom and left. [9]
[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. However, the use of an accented character in the name creates problems, both in pronunciation and keyboard entry, that it was felt that as they were grown primarily for foliage, then "Foliage ...
Various folk cultures and traditions assign symbolic meanings to plants. Although these are no longer commonly understood by populations that are increasingly divorced from their rural traditions, some meanings survive. In addition, these meanings are alluded to in older pictures, songs and writings.
Georgia O'Keeffe, Red Canna, 1919, High Museum of Art, Atlanta, Georgia. The American artist Georgia O'Keeffe is best known for her close-up, or large-scale flower paintings, [1] which she painted from the mid-1920s through the 1950s. [2] She made about 200 paintings of flowers of the more than 2,000 paintings that she made over her career. [3]
[6] [7] As of March 2020, the World Checklist of Selected Plant Families and Plants of the World Online regard many of these as synonyms (most of Canna indica) but also recognise two further species, making 12 in total.