2022 Update: Echinacea hybrids (exPt 6,7,9) and Echinacea pallida flowering phenology

Johanna and Emma decapitating E. pallida (Geena’s photo).

Echinacea pallida flowering: 

Location: Hegg Lake WMA. Start year: 2011. Echinacea pallida is a species of Echinacea that is not native to Minnesota. It was mistakenly introduced to our study area during a restoration of Hegg Lake WMA. Since 2011, Team Echinacea has visited the pallida restoration, taken flowering phenology, and collected demography on the non-native plant. We have decapitated all flowering E. pallida each year to avoid cross-pollination with the local Echinacea angustifolia. Each year, we record the number of heads on each plant and the number of rosettes, collect precise GPS points for each individual, and cut off all the heads before they produce fruits. This year, we cut E. pallida heads off on June 28th. Overall, we found and shot 224 flowering E. pallida plants, and 824 heads in total, averaging 3.7 heads per plant. These non-native plants were hearty with an average rosette count of 8 rosettes and an individual with a maximum of 65 rosettes! We did not take phenology data on E. pallida this year.

You can find more information about E. pallida flowering phenology and previous flog posts on the background page for the experiment.


Location: near exPt8. Start year: Crossing in 2011, planting in 2012Experimental plot 6 was the first E. angustifolia x E. pallida hybrid plot planted by Team Echinacea. A total of 66 Echinacea hybrids were originally planted. All individuals have E. angustifolia dams and E. pallida sires. In 2022, we visited exPt06 on June 27th visited 28 positions and found 18 living plants. No plants have flowered in this plot yet. 

You can find more information about experimental plot 6 and previous flog posts about it on the background page for the experiment.


Location: Hegg Lake WMA. Start year: Crossing in 2012, planting in 2013. Experimental plot 7 is the second E. pallida E. angustifolia plot. It contains conspecific crosses of each species as well as reciprocal hybrids, totaling 294 individuals. This summer, we visited 215 positions, and of these plants, only 119 plants were still alive. When measuring, we put pollen exclusion bags over every flowering head. There were 28 flowering plants this year, which is the most flowering plants in this plot to-date. From these 28 flowering plants, we harvested 28 heads. We have not yet used the pedigree data to see what number of these plants are hybrids or not.

You can find more information about experimental plot 7 and previous flog posts about it on the background page for the experiment.


Location: Hegg Lake WMA. Start year: 2014. Experimental plot 9 is a hybrid plot, but, unlike the other two hybrid plots, we do not have a perfect pedigree of the plants. That is because the E. angustifolia and E. pallida maternal plants used to generate seedlings for exPt9 were open-pollinated. We need to do paternity analysis to find the true hybrid nature of these crosses (assuming there are any hybrids). There were originally 745 seedlings planted in exPt9. We searched at 361 positions and found 247 living plants in 2022. When measuring, we placed pollen exclusion bags over every flowering head. Of these individuals, 49 were flowering. We harvested 109 heads from this plot!

You can find out more information about experimental plot 9 and flog posts mentioning the experiment on the background page for the experiment.

Overlaps with: demographic census in remnants

Data collected for exp679: For all three plots, we collected flowering status, rosette count, leaf length, head count and head height. All measuring data can be found in the cgdata repository (~/cgdata/summer2022/measureGood). Measuring data should be uploaded to SQL database eventually, but it is not currently there for 2022. For experimental plots 7 and 9, we also took phenology data periodically through the summer starting on June 24th and ending on August 5th, which can be found in the cgdata repository (~cgdata/summer2022/p79phenology).

Data collected for E. pallida demography: Demography data, head counts, rosette counts, GPS points shot for each E. pallida. Find demo and surv records aiisummer2022 repository. GPS coordinates can be found in demap.


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