Cattleya Orchid and Three Hummingbirds 1870s. The NGA describes the work: "Lichen covers dead branches; moss drips from trees; and, a blue-gray mist veils the distant jungle. An opulent pink orchid with light-green stems and pods dominates the left foreground." On the right, two green-and-pink Brazilian Amethysts hover about a nest while a red-tailed Sappho Comet perches nearby. Cattleya Orchid and Three Hummingbirds Cattleya Orchid and Three Hummingbirds (1871) is an oil on mahogany panel picture by Martin Johnson Heade acquired by the National Gallery of Art in 1982. Inspired perhaps by the works of Charles Darwin and Frederic Edwin Church, Heade planned to produce
ABC model of flower development "Arabidopsis", where they are also involved in controlling the development of carpels and the ovule and even with structures related to seed dispersal. The appearance of interesting phenotypes in RNA interference studies in "Petunia" and tomato led, in 1994, to the definition of a new type of function in the floral development model. The E function was initially thought to be only involved in the development of the three innermost verticils, however, subsequent work found that its expression was required in all the floral verticils. ABC model of flower development The ABC model of flower development is a scientific model