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Croyden Woods, Bucks County, PA

May 17, 2025

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philadelphiabotanicalclub

The Philadelphia Botanical Club is dedicated to increasing knowledge and appreciation of the botany of the Philadelphia region & beyond.

Please join us on Zoom or in person on Thursday, M

Please join us on Zoom or in person on Thursday, March 27th at 6:15 p.m. Our guest speaker will be Jack Levy-Diedrich. Jack is a 4th-year doctoral student in Tara Trammell's lab in the Department of Plant and Soil Sciences at the University of Delaware. He will speak on “Plant Biodiversity and Invasion in Urban Forests of the East Coast.”

We will meet at the Pennsylvania Horticultural Society, 100 North 20th St, Philadelphia. Our meeting is in the PHS McLean Library on the ground floor, which is wheelchair accessible.

6:00 p.m. Doors of the library open
6:15 p.m. The meeting begins.
6:30 p.m. Jack's presentation begins.
7:30 p.m. The meeting ends, and the McLean Library closes.

7:30 p.m. For those who would like to join us and our speaker for our after-meeting dinner, we will dine at Thanal Indian Tavern (1939 Arch St.) at the corner of 20th and Arch Streets, directly across the street from our meeting.

On the day before the meeting, we will email the Zoom link. Non-members who wish to log in to the meeting should contact us at philbotclub@gmail.com during the week before the meeting. Our meetings are free and open to the public.

The February meeting of the Philadelphia Botanical

The February meeting of the Philadelphia Botanical Club will be held on Zoom Thursday, February 27 at 6:15 p.m. We will not meet in person.

Our guest speaker, Alina Freire-Fierro, will join us from Ecuador to speak on "The Good, the Bad and the Ugly of Naming Plants: a Latin American Perspective.”

Dr. Freire-Fierro's presentation will explore plant names and the process for naming them. It will also examine the current conflict between nomenclatural stability and socio-political ideologies.

All club members receive the Zoom link the day of the meeting. Not a member? You're still welcome to attend! Email philbotclub at gmail.com prior to the 27th to receive a Zoom invitation.

Join the Philadelphia Botanical Club in person or

Join the Philadelphia Botanical Club in person or on Zoom Thursday, January 23 at 6:15 p.m. for our monthly meeting. Chris LeClair of @tufieldstation @templeambler will speak on "Examining early plant community response to a novel tornado disturbance.”

Chris writes: "On September 1, 2021, Hurricane Ida spawned a tornado that struck Ambler, Pa. with winds of 130 mph. It ravaged the mature eastern deciduous forest that had been under study on the campus of Temple University Ambler. To assess the tornado’s early impact on the forest, Chris measured floral community composition across developmental stages (adult, seedling, and seed); tree canopy as measured with LIDAR; and environmental conditions. Chris’s presentation will describe tornado-induced shifts in abundance and composition of plant species––and how these findings can inform forest management."

We will meet at the Pennsylvania Horticultural Society, 100 North 20th St, Philadelphia. Our meeting is in the PHS McLean Library on the ground floor, which is wheelchair accessible.

6:00 p.m. Doors of the library open
6:15 p.m. The meeting begins.
6:30 p.m. Chris’s presentation begins.
7:30 p.m. The meeting ends, and the McLean Library closes.

7:30 p.m. For those who would like to join us and our speaker for our after-meeting dinner, we will dine at Thanal Indian Tavern (1939 Arch St.) at the corner of 20th and Arch Streets, directly across the street from our meeting.

On the day before the meeting, we will email the Zoom link. Non-members who wish to log in to the meeting should contact us at philbotclub at gmail.com during the week before the meeting. Our meetings are free and open to the public.

"The fringed orchids in genus Platanthera are amon

"The fringed orchids in genus Platanthera are among the most diverse and well-known groups of terrestrial orchids in the eastern US, but many have experienced decline, and are considered threatened both regionally and globally. Hybridization and complex patterns of morphological variation within and among species often complicates accurate field identification, and species definitions remain debated. We combined genomics, morphology, and mycorrhizal fungus associations to shed light on why different fringed orchids grow where they do and when they form hybrids." - Dr. McCormick

Intrigued? We are too! Join the Philadelphia Botanical Club this Thursday in person or via Zoom at 6:15pm to hear more.
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We will meet at the Pennsylvania Horticultural Society, 100 North 20th St, Philadelphia (the northwest corner of Arch and 20th Streets). Our meeting is in the PHS McLean Library on the ground floor, which is wheelchair accessible.

6:00 p.m. Doors of the library open
6:15 p.m. The meeting begins.
6:30 p.m. Dr. McCormick’s presentation begins.
7:30 p.m. The meeting ends, and the McLean Library closes.

7:30 p.m. For those who would like to join us and our speaker for our after-meeting dinner, we will dine at Thanal Indian Tavern (1939 Arch St.) at the corner

On the day before the meeting, we will email the Zoom link. Non-members who wish to log in to the meeting should contact us at philbotclub at gmail.com during the week before the meeting. Our meetings are free and open to the public.

Join us in person or on Zoom Thursday, December 19

Join us in person or on Zoom Thursday, December 19, at 6:15 p.m. Melissa McCormick will speak on “North American Fringed Orchids (Platanthera), a Tale of Hybridization and Mycorrhizal Fungi.”

Dr. McCormick is Principal Investigator and Senior Scientist at the Smithsonian Environmental Research Center, Edgewater, Maryland. @smithsonianenvironment

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We will meet at the Pennsylvania Horticultural Society, 100 North 20th St, Philadelphia (the northwest corner of Arch and 20th Streets). Our meeting is in the PHS McLean Library on the ground floor, which is wheelchair accessible.

6:00 p.m. Doors of the library open
6:15 p.m. The meeting begins.
6:30 p.m. Dr. McCormick’s presentation begins.
7:30 p.m. The meeting ends, and the McLean Library closes.

7:30 p.m. For those who would like to join us and our speaker for our after-meeting dinner, we will dine at Thanal Indian Tavern (1939 Arch St.), directly across the street from our meeting.

On the day before the meeting, we will email the Zoom link. Non-members who wish to log in to the meeting should contact us at philbotclub at gmail.com during the week before the meeting.

Our meetings are free and open to the public. We can't wait to see you for the last meeting of 2024!

Join us in person or on Zoom Thursday, November 21

Join us in person or on Zoom Thursday, November 21 at 6:15 p.m. Dennis Waters @lichens4u will speak on, “Using DNA Sequencing to Untangle the Taxonomy of Lichens.”

Dennis writes:
"Despite two centuries of lichenology in the Mid-Atlantic region, there remain many unresolved questions. Several years of recent fieldwork in Hunterdon County, New Jersey, have turned up taxonomic problems that can’t be answered with the traditional methods of lichenology. A member grant from the Philadelphia Botanical Club has allowed some of these problems to be addressed using modern molecular techniques. This talk will look at several examples of these problems and how DNA sequencing goes where other methods don’t."

The club meets at the Pennsylvania Horticultural Society, 100 North 20th St, Philadelphia (the northwest corner of Arch and 20th Streets). Our meeting is in the PHS McLean Library on the ground floor, which is wheelchair accessible.

6:00 p.m. Doors of the library open
6:15 p.m. The meeting starts.
6:30 p.m. Dennis’s presentation begins
7:30 p.m. The meeting ends, and the McLean Library closes.

7:30 p.m. For those who would like to join us and our speaker for dinner, we will dine at Thanal Indian Tavern (1939 Arch St.) at the corner of 20th and Arch Streets, directly across the street from our meeting.

On the day before the meeting, we will email the Zoom link. Non-members who wish to log in to the meeting should contact us at philbotclub at gmail.com during the week before the meeting. Our meetings are free and open to the public.

Two grant opportunities coming up next month - one

Two grant opportunities coming up next month - one for students and one open to all members of the Philadelphia Botanical Club!

Applications are due December 2 for members and December 15 for students. Applications are just a few pages, and all the details are on the club website. See the link in our bio for our website and navigate to Grants for more info.

And we look forward to welcoming two past grant recipients as speakers at club meetings this year!

See you this Thursday at the next meeting of the P

See you this Thursday at the next meeting of the Philadelphia Botanical Club:
October 24, 6:15 p.m.!
Note our new fall meeting time.

We are glad to be hosting speaker Ryan Drake @rtdrake who will present on “Urban Ecology and Plant Interactions of Hymenoptera.”

We will meet at the Pennsylvania Horticultural Society, 100 North 20th St, Philadelphia (the northwest corner of Arch and 20th Streets). Our meeting is in the PHS McLean Library on the ground floor, which is wheelchair accessible. A Zoom link will be available to members and anyone who emails philbotclub at gmail.com by the day of the meeting.

Join us in person or on Zoom Thursday, October 24,

Join us in person or on Zoom Thursday, October 24, at 6:15 p.m. Ryan Drake @rtdrake will speak on, “Urban Ecology and Plant Interactions of Hymenoptera.”

We will meet at the Pennsylvania Horticultural Society, 100 North 20th St, Philadelphia. Our meeting is in the PHS McLean Library on the ground floor, which is wheelchair accessible.

6:00 p.m. Doors of the library open

6:15 p.m. The meeting starts.

6:30 p.m. Ryan’s presentation begins

7:30 p.m. The meeting ends, and the McLean Library closes.

7:30 p.m. For those who would like to join us and our speaker for dinner, we will dine at Thanal Indian Tavern (1939 Arch St.) at the corner of 20th and Arch Streets, directly across the street from our meeting.

On the day before the meeting, we will email the Zoom link. Non-members who wish to log in to the meeting should contact us at philbotclub@gmail.com during the week before the meeting. Our meetings are free and open to the public.

Welcome back! Philadelphia Botanical Club meetings

Welcome back! Philadelphia Botanical Club meetings resume next week with our annual fall kick-off: reports on summer botanizing. Come join us virtually on Zoom on Thursday, September 26th at 6:15 p.m.

Our virtual meeting will feature members’ botanical photos from the summer. We will not meet in person this month, but look for in-person meetings with a Zoom option starting in October.

Our club president Steve Jones will begin the meeting with a review of Club activities for the coming year. He will suggest ways for members to participate in our field program, lecture series, and club leadership.

At 6:30 p.m. we will share photos and reports of summer botanizing.

We would like to see your photos! If you plan to share some, email them to jbr.botanical at gmail.com before the 26th.

On the day of the meeting, we will email instructions for logging into the meeting on Zoom. If you do not receive the link by 2:00 p.m., please contact us at philbotclub@gmail.com.

Non-members who wish to log in to the meeting should contact us at the same email address. Our meetings are free and open to the public.

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