{"id":29102,"date":"2019-10-18T15:41:50","date_gmt":"2019-10-18T19:41:50","guid":{"rendered":"http:\/\/news.maryland.gov\/dnr\/?p=29102"},"modified":"2019-10-28T09:06:44","modified_gmt":"2019-10-28T13:06:44","slug":"the-cultivar-question","status":"publish","type":"post","link":"https:\/\/news.maryland.gov\/dnr\/2019\/10\/18\/the-cultivar-question\/","title":{"rendered":"The Cultivar Question"},"content":{"rendered":"<p><span style=\"font-weight: 400\">While searching for the best plants to include with a garden, you have likely come across cultivars for sale. The use of native cultivars (aka nativars) has been growing as the popularity of native plants surges.\u00a0<\/span><\/p>\n<div id=\"attachment_29103\" style=\"width: 590px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/Monarda-Claire-Grace-by-cultivar413-CC-by-2.0.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-29103\" class=\" wp-image-29103\" src=\"http:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/Monarda-Claire-Grace-by-cultivar413-CC-by-2.0.jpg\" alt=\"Photo of purple monarda flowers\" width=\"580\" height=\"326\" srcset=\"https:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/Monarda-Claire-Grace-by-cultivar413-CC-by-2.0.jpg 640w, https:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/Monarda-Claire-Grace-by-cultivar413-CC-by-2.0-300x169.jpg 300w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/><\/a><p id=\"caption-attachment-29103\" class=\"wp-caption-text\">In Mt. Cuba trials, Monarda fistulosa \u2018Claire Grace\u2019 was favored by butterflies. Photo by cultivar413 CC by 2.0<\/p><\/div>\n<p><!--more--><\/p>\n<p><b>What\u2019s in a Name?<\/b><\/p>\n<p><span style=\"font-weight: 400\">To understand more about nativars, you should be aware of the following terms:\u00a0<\/span><\/p>\n<p><b>Native- <\/b><span style=\"font-weight: 400\">a species that was naturally found in a given area. In the United States, we limit that to those species found before European settlement.<\/span><\/p>\n<p><b>Cultivar- <\/b><span style=\"font-weight: 400\">a variety of a native species that has been deliberately selected, crossbred or hybridized for desirable characteristics that can be maintained by propagation. Often, these species are represented by the name of the plant with the cultivar variety in apostrophes. Example: garden phlox \u2018Jeana\u2019\u00a0<\/span><\/p>\n<p><b>Straight Species- <\/b><span style=\"font-weight: 400\">a native species in its natural form\u00a0<\/span><\/p>\n<p><b>Nativar- <\/b><span style=\"font-weight: 400\">a cultivar of a native species<\/span><\/p>\n<p><span style=\"font-weight: 400\">The use of nativars is varied. Some nativars are bred for showier characteristics while others are designed to resist diseases and pests or to tolerate wider environmental variables, like soil moisture. It is important to note that most nativars are bred for human-valued aesthetics such as number and size of flowers, flowering period and foliage size or color. However, the question looms: are these nativars providing the same wildlife values and ecological functions as straight species? The answer is complex.\u00a0<\/span><\/p>\n<p><b>Examining the Research\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400\">Research examining nativars versus straight species is still a relatively new. In some studies, the species are compared by the number of animal visits while other studies examine nectar and pollen content. Below are summaries from several research studies conducted on nativars:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A <\/span><a href=\"https:\/\/ento.psu.edu\/pollinators\/resources-and-outreach\/bees-bugs-blooms-2013-a-pollinator-trial\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400\">2015 Penn State trial<\/span><\/a><span style=\"font-weight: 400\"> found that around 50% of the time, the straight species was better than the nativar in terms of the number of pollinator visits. In the experiments, the straight species wild bergamot (<\/span><i><span style=\"font-weight: 400\">Monarda fistulosa<\/span><\/i><span style=\"font-weight: 400\">) was visited by almost four times more pollinators than the nativar wild bergamot \u2018Claire Grace.\u2019 Similarly, the straight species New England aster (<\/span><i><span style=\"font-weight: 400\">Symphyotrichum novae-angliae<\/span><\/i><span style=\"font-weight: 400\">) had three times more pollinator visits than the nativar New England aster \u2018Purple Dome.\u2019 On the flip side, the nativar aromatic aster \u2018October Skies\u2019 (<\/span><i><span style=\"font-weight: 400\">Symphyotrichum oblongifolium<\/span><\/i><span style=\"font-weight: 400\">) had two and a half times more pollinator visits than the straight species, and the nativar threadleaf tickseed (<\/span><i><span style=\"font-weight: 400\">Coreopsis verticillata<\/span><\/i><span style=\"font-weight: 400\">) \u2018Moonbeam\u2019 had twice as many visits than the straight species.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Missouri Botanical Garden reports that while the nativar serviceberry (<\/span><i><span style=\"font-weight: 400\">Amelanchier canadensis<\/span><\/i><span style=\"font-weight: 400\">) \u2018Glenn Form\u2019 (aka Rainbow Pillar) is typically unaffected by powdery mildew like the straight species, less than 10% of the flowers produce mature fruit.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><a href=\"http:\/\/dspace.udel.edu\/bitstream\/handle\/19716\/21442\/2016_NevisonKeith_MS.pdf?sequence=1&amp;isAllowed=y\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400\">Nevison (2016)<\/span><\/a><span style=\"font-weight: 400\"> found that within the garden phlox (<\/span><i><span style=\"font-weight: 400\">Phlox paniculata<\/span><\/i><span style=\"font-weight: 400\">) group, the cultivar \u2018Jeana\u2019 attracted fourteen times the insect abundance as the straight species with over twice the insect diversity. Garden phlox \u2018Dick Weaver\u2019 also attracted more insects than the straight species. The worst performing cultivar was garden phlox \u2018Volcano Red.\u2019 Eastern tiger swallowtails were the insects encountered the most in the trials and the top two cultivars had similar nectar volume and sugar concentration as the straight species. The cultivar \u2018Jeana\u2019 had almost twice as many flowers as the straight species and grew taller as well, two traits which may have enhanced its attractiveness.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Trials at the Mt. Cuba Center examined the number of pollinator visits on cultivar <\/span><i><span style=\"font-weight: 400\">Monardas<\/span><\/i><span style=\"font-weight: 400\"> versus straight species. Interestingly enough, the cultivar wild bergamot \u2018Claire Grace\u2019 which underperformed in Penn State\u2019s trials was favored by butterflies and moths in Mt. Cuba\u2019s trials. In addition, the cultivar bee balm \u2018Jacob Cline\u2019 received over 200 more hummingbird visits than the straight species.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/journal.ashs.org\/horttech\/view\/journals\/horttech\/28\/5\/article-p596.xml\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400\">Baisden et al. (2018)<\/span><\/a><span style=\"font-weight: 400\"> compared insect herbivory on woody plant cultivars versus straight native species. Overall, most plants did not have a significant difference in herbivory between the cultivars and straight species. The exceptions included cultivars which had more red or purple (anthocyanin-enriched) leaves. The researchers surmised that the additional anthocyanins made the leaves distasteful.\u00a0<\/span><\/li>\n<\/ul>\n<div id=\"attachment_29104\" style=\"width: 485px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/Lobelia-speciosa-by-stevekeiretsu-CC-by-NC-ND-2.0.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-29104\" class=\" wp-image-29104\" src=\"http:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/Lobelia-speciosa-by-stevekeiretsu-CC-by-NC-ND-2.0.jpg\" alt=\"Photo of cardinal flower\" width=\"475\" height=\"317\" srcset=\"https:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/Lobelia-speciosa-by-stevekeiretsu-CC-by-NC-ND-2.0.jpg 799w, https:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/Lobelia-speciosa-by-stevekeiretsu-CC-by-NC-ND-2.0-300x200.jpg 300w, https:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/Lobelia-speciosa-by-stevekeiretsu-CC-by-NC-ND-2.0-768x512.jpg 768w\" sizes=\"auto, (max-width: 475px) 100vw, 475px\" \/><\/a><p id=\"caption-attachment-29104\" class=\"wp-caption-text\">Hybrid cardinal flower (Lobelia x speciosa) by stevekeiretsu CC by NC ND 2.0<\/p><\/div>\n<p><span style=\"font-weight: 400\">It is important to note that simply quantifying the number of bee or pollinator visits does not make a plant beneficial to wildlife. For example, White (2016) found that hummingbirds visited commercial hybrid lobelia (<\/span><i><span style=\"font-weight: 400\">Lobelia x speciosa<\/span><\/i><span style=\"font-weight: 400\">) more often than the straight species of cardinal flower (<\/span><i><span style=\"font-weight: 400\">Lobelia cardinalis<\/span><\/i><span style=\"font-weight: 400\">). However, when they examined the nectar content, the hybrid only provided 20% of the energy that the hummingbird would get from the straight species. The hybrid was causing hummingbirds to expend more energy to get less food. Future studies are needed to assess the nutritional content of straight species versus nativars.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">One additional looming question concerning nativars is how they might affect wild populations of plants if cross pollination occurs. It is possible that cross-pollination may change the gene pool for local plant populations which may have unintended consequences.\u00a0<\/span><\/p>\n<p><b>Final Thoughts<\/b><\/p>\n<p><span style=\"font-weight: 400\">Overall, it is best to proceed with caution when deciding on whether or not to add nativars to your landscape. When purchasing plants, you should question your supplier on whether or not the plants are straight species or cultivars. When in doubt, opt for the straight species if it is available as that plant is the one that co-evolved with our local wildlife and ecosystems.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">If you are like me, you likely have some nativars as part of your current gardens. In some situations, nativars work better for our needs, too, or are more accessible.\u00a0 A nativar is generally better than a non-native species, and it is certainly better than an invasive species!\u00a0<\/span><\/p>\n<p><b>References<\/b><span style=\"font-weight: 400\">:\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Baisden, E., D. W. Tallamy and E. Boyle. 2018. Do Cultivars of Native Plants Support Insect Herbivores? HortTechnology. 28(5): 596\u2013606.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Coombs, G. 2016. Monarda for the mid-atlantic region. <\/span><a href=\"https:\/\/1x848d9mftq5g9wx3epiqa1d-wpengine.netdna-ssl.com\/wp-content\/uploads\/2016\/06\/Monarda-Report-FINAL.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400\">https:\/\/1x848d9mftq5g9wx3epiqa1d-wpengine.netdna-ssl.com\/wp-content\/uploads\/2016\/06\/Monarda-Report-FINAL.pdf<\/span><\/a><span style=\"font-weight: 400\"> Accessed October 2, 2019.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Holcomb, E. J. and C. Schmotzer. 2015. Bees, Bugs, and Blooms Penn State Extension. <\/span><a href=\"https:\/\/ento.psu.edu\/pollinators\/resources-and-outreach\/bees-bugs-blooms-2013-a-pollinator-trial\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400\">https:\/\/ento.psu.edu\/pollinators\/resources-and-outreach\/bees-bugs-blooms-2013-a-pollinator-trial<\/span><\/a><span style=\"font-weight: 400\"> Accessed October 2, 2019.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Missouri Botanical Garden. 2019. <\/span><i><span style=\"font-weight: 400\">Amelanchier canadensis<\/span><\/i><span style=\"font-weight: 400\"> \u2018Glenn Form\u2019 Rainbow Pillar.. <\/span><a href=\"http:\/\/www.missouribotanicalgarden.org\/PlantFinder\/PlantFinderDetails.aspx?taxonid=293359\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400\">http:\/\/www.missouribotanicalgarden.org\/PlantFinder\/PlantFinderDetails.aspx?taxonid=293359<\/span><\/a><span style=\"font-weight: 400\"> Accessed October 2, 2019.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Nevison, K. 2016. Considering a role for native plant cultivars in ecological landscaping: an experiment evaluating insect preferences and nectar forage values of <\/span><i><span style=\"font-weight: 400\">Phlox<\/span><\/i><span style=\"font-weight: 400\"> species vs. its cultivars. Unpublished master\u2019s thesis, University of Delaware.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">White, A. 2016. From nursery to nature: evaluating native herbaceous flowering plants versus native cultivars for pollinator habitat restoration. Unpublished doctoral thesis, University of Vermont.<\/span><\/p>\n<hr \/>\n<p><em>Happy Fall!<\/em><\/p>\n<p><em>Fall is my favorite time of year. I love the sights and smells as the summer fades, and it is a great time to be out in the garden. Currently, many animals are in the midst of migration, and we are having some record breaking dragonfly migration swarms this year! As fall unfolds, here are a few things to consider this time of year:\u00a0<\/em><\/p>\n<ol>\n<li><em><a href=\"https:\/\/news.maryland.gov\/dnr\/2018\/09\/24\/habichat-bewitching-butterflies\/\" target=\"_blank\" rel=\"noopener noreferrer\">Skip the fall clean-up to help local wildlife<\/a><\/em><\/li>\n<li><em><a href=\"https:\/\/news.maryland.gov\/dnr\/2017\/09\/01\/habichat-seed-sowing\/\" target=\"_blank\" rel=\"noopener noreferrer\">Consider sowing seeds<\/a><\/em><\/li>\n<li><em><a href=\"https:\/\/dnr.maryland.gov\/wildlife\/HabichatArchive\/Habichat44.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Fuel fall migrants<\/a><\/em><\/li>\n<\/ol>\n<p><em>In addition, last year\u2019s rainy summer, coupled with this year\u2019s drought and other factors, have taken a toll on oaks in our region. The University of Maryland Extension has put together an informative and concise article on <a href=\"https:\/\/extension.umd.edu\/hgic\/topics\/why-oak-trees-are-declining\" target=\"_blank\" rel=\"noopener noreferrer\">Why Oak Trees are Declining<\/a>. If you are in need of trees and shrubs for conservation or lumber, check out the <a href=\"http:\/\/nursery.dnr.maryland.gov\/\" target=\"_blank\" rel=\"noopener noreferrer\">Maryland State Tree Nursery<\/a> which is accepting orders for Spring 2020.\u00a0<\/em><\/p>\n<p><em>In this issue, you can learn about a lovely native wildflower, the New England aster, as well as a native group of bees called sweat bees that help to pollinate New England aster and its relatives. In addition, with advances in plant research, we are learning more about how cultivars affect our landscapes. Finally, learn about an up and coming invasive insect in Maryland, the spotted lanternfly, and how to report if you see one in the state.\u00a0<\/em><\/p>\n<p style=\"text-align: right\"><em>Happy Habitats,<br \/>\n<\/em><em>Kerry Wixted<\/em><\/p>\n<hr \/>\n<p><em><a href=\"https:\/\/public.govdelivery.com\/accounts\/MDDNR\/subscriber\/topics?qsp=MDDNR_5\" target=\"_blank\" rel=\"noopener noreferrer\">Click here<\/a>\u00a0to have HabiChat\u2014the quarterly backyard wildlife habitat newsletter from the\u00a0<a href=\"http:\/\/dnr.maryland.gov\/wildlife\/Pages\/habitat\/wildacres.aspx\" target=\"_blank\" rel=\"noopener noreferrer\">Wild Acres<\/a>\u00a0program\u2014delivered right to your inbox!<\/em><\/p>\n<p style=\"text-align: center\"><strong><em>In this Issue<br \/>\n<\/em><\/strong><a href=\"https:\/\/news.maryland.gov\/dnr\/2019\/10\/18\/native-animal-profile-sweat-bees-aka-halictid-bees\/\"><em>Native Animal Profile: <\/em><\/a><em><a href=\"https:\/\/news.maryland.gov\/dnr\/2019\/10\/18\/native-animal-profile-sweat-bees-aka-halictid-bees\/\">Sweat Bees (aka Halictid Bees)<\/a><br \/>\n<a href=\"https:\/\/news.maryland.gov\/dnr\/2019\/10\/18\/native-plant-profile-new-england-aster-symphyotrichum-novae-angliae\/\">Native Plant Profile: New England Aster (Symphyotrichum novae-angliae)<\/a><br \/>\n<a href=\"https:\/\/news.maryland.gov\/dnr\/2019\/10\/18\/seek-and-destroy-the-spotted-lanternfly\/\">Search and Destroy: the Spotted Lanternfly<\/a><\/p>\n<p><a href=\"http:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/header.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-29111\" src=\"http:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/header.jpg\" alt=\"Header photo of monarch butterfly on New England aster flower\" width=\"900\" height=\"378\" srcset=\"https:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/header.jpg 900w, https:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/header-300x126.jpg 300w, https:\/\/news.maryland.gov\/dnr\/wp-content\/uploads\/sites\/2\/2019\/10\/header-768x323.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>While searching for the best plants to include with a garden, you have likely come across cultivars for sale. The use of native cultivars (aka nativars) has been growing as the popularity of native plants surges.\u00a0<\/p>\n","protected":false},"author":174,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[957,13],"tags":[3614,3617,5078,4914,4211],"class_list":["post-29102","post","type-post","status-publish","format-standard","hentry","category-appnews","category-wildlife","tag-habichat","tag-kerry-wixted","tag-native-gardening","tag-native-plants","tag-wild-acres"],"acf":[],"_links":{"self":[{"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/posts\/29102","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/users\/174"}],"replies":[{"embeddable":true,"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/comments?post=29102"}],"version-history":[{"count":10,"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/posts\/29102\/revisions"}],"predecessor-version":[{"id":29256,"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/posts\/29102\/revisions\/29256"}],"wp:attachment":[{"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/media?parent=29102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/categories?post=29102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news.maryland.gov\/dnr\/wp-json\/wp\/v2\/tags?post=29102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}