Archive for the 'Climate' Category

Larkspurs in November

Wednesday, November 16th, 2016

Last Saturday at the Port Louisa National Wildlife Refuge along the Mississippi River we were surprised to find several larkspur (Delphinium sp.) plants among a dense stand of dried goldenrods. They were in the open woodland near the new visitors’ center on the bluff looking down into the flood plain.

Native larkspurs are mostly known to bloom in May, June and July. We are not certain of the species because the plants were 3 to 3 1/2 feet (a meter and a bit) tall. The Dwarf Larkspur (Delphinium tricorne) that we see in the spring are about 1/3 that tall.

To find several healthy green plants with gorgeous blooms on November 12 is very unusual. Climate changes that have led to such a warm autumn are confusing other plants. We found some Common Fleabane (Erigeron philadelphicus) still blooming in our yard yesterday. Its normal bloom time is April into July.

Yesterday the Astronomy Picture of the Day site hosted by NASA (National Aeronautics and Space Administration) had a picture showing the Temperature Departure From Average for much of the Northern Hemisphere for November 14, 2016. Here in Iowa the temperature looked like it was 10 to 18 degrees F. above normal. Over the North Pole it was 36 degrees F. above normal for this time of year. Some areas of the map were cooler than normal but great swaths were much warmer than they typically are.

As much as we enjoy beautiful flowers, their blooms at the wrong time of year will mean they bloom in vain. Ruby-throated Hummingbirds headed south in September. The long-tongued bees and butterflies that also pollinate larkspurs may no be longer around so they may not set seeds.