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		Effects of frost on wildflowers: an unexpected consequence of climate change--image 08 of 22 Photo of a meadow with thousands of Helianthella quinquenervis (aspen sunflower, Asteraceae) plants. In the year that this photo was taken, a springtime frost killed all but a few flower buds....		More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 09 of 22 A graph of the number of unfrosted flowers of the aspen sunflower (Helianthella quinquenervis) from an annual count in a 10x45m plot at the Rocky Mountain Biological Laboratory, Gothic, Colorado, by...		More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 10 of 22 The number of flowers produced by the aspen sunflower (Helianthella quinquenervis) in a particular year is affected by the date of the start of the growing season, which is in turn influenced by the...		More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 11 of 22 Results of a demographic study of Helianthella quinquenervis (aspen sunflower, Asteraceae) within plots at 2,900m at the Rocky Mountain Biological Laboratory. Note that seedlings are not common in...		More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 12 of 22 Excavated plants of Helianthella quinquenervis (aspen sunflower, Asteraceae). H. quinquenervis is a long-lived perennial (some individuals can live 50-75 years). Note that each plant has multiple...		More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 13 of 22 Delphinium barbeyi, or tall larkspur, flowering in a year with no frost damage. Photographed (by David Inouye) in front of Gothic Mountain, at the Rocky Mountain Biological Laboratory. Altitude about...		More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 14 of 22 A female broad-tailed hummingbird (Selasphorus platycercus) in Colorado visiting tall larkspur (Delphinium barbeyi). The hummingbirds migrate north from Mexico each spring. Larkspurs serve as an...		More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 15 of 22 Photo of an early-stage inflorescence of tall larkspur (Delphinium barbeyi) after a mid-June snowstorm at the Rocky Mountain Biological Laboratory. The buds were killed by the cold temperature. Like ...		More Info
		http://www.amjbot.org/content/96/10/1821.full.pdf+html

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 16 of 22 Buds of Delphinium barbeyi (tall larkspur, Ranunculaceae) killed by a late season frost. In those years, the larkspur suffers reproductive failure, affecting animal species that rely on them for...		More Info

		Effects of frost on wildflowers: an unexpected consequence of climate change--image 17 of 22 The glacier lily (Erythronium grandiflorum) is one of the earliest wildflowers to bloom after snowmelt in the Rocky Mountains. Its ovaries and seeds are sensitive to late-season frosts. But...		More Info
		http://www.amjbot.org/content/97/9/1431.full

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