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Look Who's Visiting Us Now!

Dr. Peter Raven at the JC Raulston Arboretum

"Plant Conservation in the 21st Century"Peter Raven, Ph.D., President Emeritus, Missouri Botanical Garden

  • Thursday, December 4, 2014 – 7:30 pm9:00 pm

About Peter Raven

Peter H. Raven is one of the world's leading botanists and advocates of conservation and biodiversity.

For four decades, he headed the Missouri Botanical Garden, an institution he nurtured into a world-class center for botanical research and education, and horticultural display. He retired as president in 2010 and assumed the role of president emeritus and consultant through 2014.

Described by Time magazine as a "Hero for the Planet," Peter champions research around the world to preserve endangered plants and is a leading advocate for conservation and a sustainable environment.

In recognition of his work in science and conservation, he's the recipient of numerous prizes and awards, including the prestigious International Prize for Biology from the government of Japan and the U.S. National Medal of Science, the country's highest award for scientific accomplishment. He has held Guggenheim and John D. and Catherine T. MacArthur Foundation fellowships.

Peter Raven was a member of President Bill Clinton's Committee of Advisors on Science and Technology. He also served for 12 years as home secretary of the National Academy of Sciences and is a member of the academies of science in Argentina, Brazil, China, Denmark, India, Italy, Mexico, Russia, Sweden, the U.K., and several other countries.

The author of numerous books and reports, both popular and scientific, Peter co-wrote Biology of Plants, an internationally best-selling textbook, now in its sixth edition. He also co-authored Environment, a leading textbook on the environment.

From Missouri Botanical Garden's Web site.

Cost
Free for Friends of the JC Raulston Arboretum members, NC State University students (with ID), and Department of Horticultural Science faculty and staff, all others $5.00.
Registration
Advance registration is not available.
Location
Ruby C. McSwain Education Center, JC Raulston Arboretum at NC State University, 4415 Beryl Road, Raleigh, North Carolina.
Directions
Need directions? Click here.
Parking
Free parking is available at the JC Raulston Arboretum and along Beryl Road.
Questions
Please call (919) 513-7005 for more information about this lecture.

Magnolia Propagation Research

Not all great plants make their way to garden centers for a variety of reasons.  One significant reason that prevents some beautiful specimens from entering the mainstream is difficulty in propagating and producing them in enough numbers. There are many evergreen magnolias from Asia that have proven very difficult to produce in any way other than seed.  Seed production for trees can be impractical in most cases for many nurseries for a variety of reasons.  At the JC Raulston Arboretum, we've been growing one species which we think is quite outstanding - Magnolia yuyuanensis or Chinese wood-lotus.  It bears pure white cupped flowers with deep red stamens in spring followed by pinkish-red seed pods and all backed by narrow, glossy, evergreen foliage.  Our plants have survived temperatures as low as -19C (-3F) for short periods and have had no issues with temperatures in the low teens.CTG18608

The propagator at Atlanta Botanical Garden, Ethan Guthrie, has been using very high rates of rooting hormone (50,000ppm KIBA or potassium salt of indolebutyric acid).  Typical commercial concentrates of KIBA top out at 10,000ppm KIBA so Ethan's rates are through the roof but you can't argue with his success.

An NC State Horticultural Science graduate student, Dominic Gillooly, is now working with Dr. Tom Ranney to get a handle on propagating M. yuyuanensis and other evergreen species.  He'll be trying rooting hormone rates of between 10,000ppm to 50,000ppm with a control of 0ppm on these magnolias to try to develop a commercially feasible propagation regime for these outstanding plants.

Graduate student Dominic Gillooly collecting a couple hundred cuttings of Magnolia yuyuanensis for a research project.

Knowing how difficult producing this plant from cuttings has proven to be we planted a hedge of them years ago with plans to coppice or cut them back regularly to produce good cutting wood for research on the best propagation methods.  We love it when our plans and our faculty and student's needs coincide.  If Dominic and Tom can produce some good results, we'll be sure to get these great magnolias and the knowledge of how to produce them into the hands of NC nurserymen fulfilling J.C.'s exhortation to "Plan - and Plant for a Better World."

Follow me at @jcramark because life is too short for boring plants.

Check out all the happenings, see more images, and learn more at the JC Raulston Arboretum where we are Planting a Better World.

Look Who's Visiting Us Now! - Scott McMahan

20130709-173252.jpg Scott McMahan, owner of McMahan's Nursery in Clermont, GA and Garden*Hood (winner of Best New Plant Source by Atlanta Magazine) in Atlanta, GA stopped by for a visit and a raid on the JC Raulston Arboretum collections. Scott's rare plant nurseries offer a wide variety of plants including selections from his many plant collecting trips to Asia. Scott has been collecting in China, Taiwan, Korea, Bhutan, etc. for years often with JCRA friends Dan Hinkley and Ozzie Johnson. Scott has been the source of some great plants growing at the JCRA including a fantastic, huge leaved Hydrangea longipes and the stunning vine Schizophragma megalocarpa. He brought us a few treasures such as 2 different unidentified species of snowbell and a Sinofranchetia. We sent him on his way with a few things from the nursery and a bag full of cuttings. Check out his retail nurseries next time you're in GA, more information can be found at www.mcmahansnursery.com and www.gardenhoodatlanta.com Follow me at @jcramark because life is too short for boring plants.