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The flowers are visited by various insects, including many species of bees, butterflies, pollinating flies. [8] [9] The flowers themselves come in a range of colors from a deep rust-orange to a pure yellow and often show striking gradients of color. In the UK, it flowers in June and July. [9]
Southern corn rust disease, can be confused with common rust. Southern rust's distinguishing characteristic is that pustules form mostly on the upper leaf surface and spores are more orange in color. Southern rust spreads more quickly and has a higher economic impact when hot, humid weather conditions persist.
P. helianthi is the main causal agent of sunflower rust, but four other Puccinia species can also cause rust on cultivated and wild sunflower species. Although they rarely appear, it can be difficult to distinguish them from P. helianthi on sunflower.
This perennial has the cutest button-like orange flowers dancing on long stems. Geum bloom in the spring but have lovely, dense foliage the rest of the season. Liudmyla Liudmyla - Getty Images
The flowers are typically red, orange, or yellow, or any combination of those colours, and are aggregated in inflorescences that are spikes or panicles (thyrses). The main pollinators of the flowers are bees, hummingbirds, sunbirds, and bats. The pollination mechanism is conspicuously specialized.
The orange daylily ... and a bright orange clump of flowers was a common sight in many homestead gardens. ... Sought-after improvements include rust resistance ...
The individual umbels are 1–2 cm across with 10–20 flowers and 1–5 tiny bracteoles. The actinomorphic flowers are small, with 5 yellowish petals and 5 tiny, green sepals, 5 stamens and (if present) 2 styles. [2] Sometimes there are 4 or 5 peduncles branching from the top of the stem, giving the impression of an umbel of umbels of umbels.
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