Tour Gentians and Trees at North Park Arboretum, October 2020

Thank you, Dianne. We all enjoyed the tour and learned a lot about North Park, the arboretum, and gentians.

Evan checking a Katsura leaf

Katsura tree with a memorial bench

Black gum tree in fruit

Red maple

Walking a magical carpet of leaves with Dianne leading us.
An excellent resource she recommended  is The Sibley Guide to Trees.

Thank you Dianne for the tour which we all enjoyed and we could not have had a better fall day. 

Dianne showing Linda the handout with numbers showing the location of named tree species.

Perfect day to be out for Denny and Linda

Identifying tag on named trees

 

1) Black Gum, aka Black Tupelo, aka Sour Gum

Nyssa sylvatica

 

Grows to 60' tall, likes full sun.  A single straight trunk.  The grain of the wood spirals in a cross gram which makes it tough and almost impossible to split.  The fruit are blue-black oval drupes with a 14% fat content.  The birds love it.

Blacd gum in fruit

 

2)

Sweet Gum

Liquidambar straciflua

 

Grows 60-75 feet tall.  Star shaped leaves and dangling round seed balls. Great fall color of yellow, orange, red and maroon on a single tree.  Deer resistant.  Host plant for Luna moth and Hickory Horn devil

Red maple leaf

Sweet gum

 

3)  Northern Hackberry

Celtis occidentalis

 

related to elms and once placed in the same family Ulmaceae, but now considered part of the hemp family, Cannabacaeae.

The fruit is small and orange/brown and loved by birds. It has a 10-20 foot taproot which makes it drought tolerant.  Can live 200 years.  Host to snout butterfly, tawny emperor butterfly and mourning cloak butterfly.

Hackberry

 

4) Eastern Red Cedar

Juniperus virginiana

 

Evergreen. Grows 20-50 foot tall.  The aromatic wood is used to make storage chests.  The berries are used as flavoring in gin.  The birds also eat them.

Juniper/Red cedar

 

5) Northern White Cedar, aka arborvitae

Thuja occidentalis

Evergreen Grows 30-45 feet tall.

Leaves re opposite in flattened fan shaped sprays.

 

6) Flowering crabapple

Only four species are native but aliens are so similar in leaf chemistry that there is little evidence that native insects can tell the difference.

 

7) Chinese Elm, aka Lacebark Elm

Ulmus parvifolia

 

It is resistant to Dutch Elm disease. Has distinctive gray-green bark exfoliating to orange patches.

The host plant for the question mark and comma butterflys

Lacebark elm

 

8) Osage Orange

Maclura pomifera

Native to OK and Texas  Lewis and Clark discovered it in 1804.  Jefferson had two in his garden from seeds sent to him by Lewis and Clark.

In the 1850's it was used as a hedge, thus its alias "hedge apple". The fruit is NOT edible.

 

Osage fruit, size of baseball

Osage fruit (monkey balls) on the ground. 

9)  Red Oak

Quercus rubra

Grows 90-150' tall.

Native.  The acorns have a shallow cup.  This is a "mast year" for red oaks.

 

10) Shagbark Hickory

Laris deciduas   Grows 70' tall

 

Named for its shaggy bark.  Host for the hickory horned devil, hickory tussock moth, american dagger moth and walnut caterpillar.

Shagbark hickory (tall tree, shedding bark)

 

11)  American hornbeam, aka Ironwood, aka musclewood

Birch Family

Carpinus caroliniana  Grows 30' tall.

bark is smooth gray, fluted, muscular looking

 

12) Katsura

Cercidiphyllum japonicum

native to Japan

heart shaped leaves.  Smells like roasted marshmallows.

 

13) Umbrella Magnolia

Magnolia tripetala

15-30' tall.  Leaves very large. Flowers creamy white May/June

Umbrella magnolia

 

14) Corkwood Tree

Leitneria floridana

Very light wood. Used for fishing bobbers. Prefers swamps and streambeds

Cork tree

Many areas have not been cleared in ages, but we did see a gentian here.
Other locations were better for spotting. See below for a closeup.

September tour of Sandy Csikari's garden

Sandy gives a brief overview

On a pleasant September evening, members gathered at the home of Sandy Csikari to tour her beautiful gardens. Sandy Csikari is a Penn State Master Gardner who has spoken to our club in the past about hydrangeas. In 2016 her garden was a part of the Pittsburgh Botanic Town and Country Garden Tour. 

 

Sandy’s garden was established in 1988.  She has approximately 100 varieties of daylilies and 400 varieties of hostas. The hostas have been planted in pots, and buried in the ground, also lined with gravel due to the issue she has with voles.  If she did not do this, the roots of her hostas would be eaten, destroying the plant.

 

Sandy is using a variety of fencing materials to keep out the deer.  The one time she left the gate open, you could see where the deer got in and did damage.  In the front of her house, her plantings are focused on plants left alone by the deer.  There was Alyssum, Vining Vinca, Mums, various grasses, Zinnias, Irises, Wandering Jew, Lantana, Begonia, Perilla (a plant in the Coleus family which reseeds readily), Flowering Vinca which had reseeded itself from last year and liriope.

 

All of the hostas and daylilies she has were labeled for identification.  Sandy has a mixture of sun and shade gardens.  The gardens gave one a sense of peace.  In her many shade gardens she had Hostas, Ferns, Caladium, Toad Lilies, Coral Bell, Ligularia, Arum Itallica, Jack Frost Bruneria, Persicaria (this is kept controlled in the shade, easily pull out plants where not wanted), Elephant Ear, Astilbe, and Ginger among other plants too numerous to name.

 

In the sunnier gardens there were many Zinnias in Boom, as well as Dahlias and a variety of other flowers. 

 

For September, a very colorful garden.

 

If anyone has any ideas for October’s meeting, please get in touch with Colleen.  Unless we can come up with a tour somewhere, it is looking like there will be no meeting in October.

 

We are not collecting dues at this time due to the uncertainty of how next year will look.  This will be revisited early in 2021.

 

It has been decided that we will not be doing our usual Christmas luncheon this year.  It just wouldn’t be fun having to deal with all of the restrictions that are currently in place surrounding dining.

 

Due to the uncertainty of the availability of the church, we will not be planning a January meeting.  

 

Reminder that we are looking for a member to assume responsibility for programming.  You can partner up with one or more members to make it a little easier. Please contact Colleen to get more information if you are interested. Holding office or chairing a committee is a great way to get involved.

Rose Mary's photos below

 

Claudia & Jane

Debbie & Jeanne

Arum italic (orange spikes)

Sandy gave us a choice of plants from her garden

Tree Pittsburgh Tour, August 24, 2020

 LAGC Meeting – August 25, 2020 

Please see end of notes for information about our next meetings and officer and chair needs.

On a warm August evening evening, members gathered at Tree Pittsburgh’s Heritage Nursery.

 

Joe Stavish, the Manager of Community Education provided us with background information and conducted us on a tour of their nursery.

 

Tree Pittsburgh was established in 2006, starting out as Friends of Pittsburgh Urban Forest.  They started out working with the City of Pittsburgh and have expanded to working with Allegheny County in tree planting and replanting projects.  There are approximately 40,000 street trees that are taken care of.  If the tree should come down or otherwise die, it is replaced by an urban tolerant tree from their stock.  In the County, they are working to help establish hillside and mass plantings where there is little to no tree canopy.  They work with other like-minded organizations to determine what trees need to be planted, and where.

 

The current location of Tree Pittsburgh is on the former Tippins Steel Mill, where the overflow buildings and floating marina once stood.  It is considered a brown field, due to the contaminated soil from the prior steel mill industry buildings.  They are working to restore native trees to their site, a long narrow 5 mile stretch of land.  When they first got the site, they used goats to eat all the invasives, then started planting trees on the hillside along the river.  As the tree canopy increases, available sunlight to invasives decreases, thereby reducing their growth.  Volunteers also work to cut back invasives as they appear.  Invasives can also change the soil chemistry, so by removing them, soil is brought back to its native state.

 

They have 9 giant rain barrels which will hold up to 6,000 gallons of rainwater, coming off of the sloped roof.  The entire roof is comprised of solar panels, resulting in a net 0 energy consumption organization.

 

Approximately 14,000 trees are currently growing, made up of 60 – 70 different species.  The urban tolerant trees come from growers in the state.  All other trees that are grown by Tree Pittsburgh start from seed, using a shredded pine bark/peat moss/slow release fertilizer mixture.  The seed comes from volunteers or members of the public.  Joe will provide Marlowe with a seed collection guide, to make sure you’re collecting the right seed for them, if interested.  The goal is to maintain genetic diversity. Seeds are started in the hoop house and live there for approximately 1 year. Once the seedling emerges, and it is time to transplant or up-pot them, the roots are pruned.  This is done each time the tree is up-potted, so that when it is planted in the ground, the tree will thrive. From the hoop house it is moved to a temporary hoop house, sealed with plastic.  When it is time, they are then moved into outdoor growing rooms to acclimate to being outside. In the winter, trees are buried in bark mulch to insulate the pots.  They get the mulch from companies that prune trees, looking to dispose of the shreddings.  Once a tree reaches 5 years of age, it needs to go in the ground, so all of their trees in pots are 5 years or younger.  A smaller tree suffers less transplant shock and has a greater ability to survive. 

 

The entrance to Tree Pittsburgh’s offices had a large stand of Comptonia – Sweet Fern on one side, which is a ground cover shrub and fragrant in the springtime.  Very unusual looking shrub, no members were familiar with it.  On the other side of the entrance was a large stand of Aromatic Sumac, also a low growing shrub.  Both of these shrubs are deer resistant, a plus for us gardeners.

 

A native or heritage tree is one that is 100 years or older. It is very important, as with any other plantings to plant the right tree in the right place.  It’s all about location.

 

There are a number of ways that the public can get trees from Tree Pittsburgh.  They have a tree giveaway, which is sponsored by a foundation.  They target communities that need trees, those with little to no tree canopy.  They are a vendor at May Market as well as the Landscape Symposium in the spring.  They hold their own sales also.  They do have a plant availability list, but require a minimum order of 10 trees.  If there are enough members interested, this is something that could be looked into.

 

Tree Pittsburgh also conducts education and advocacy programs throughout Allegheny County.  A tree Tenders certification course is offered a few times each year, for those members who are interested in furthering their tree expertise. 

Reminder that we are looking for a member to assume responsibility for programming.  You can partner up with one or more members to make it a little easier. Please contact Colleen to get more information if you are interested. Holding office or chairing a committee is a great way to get involved.

 

The church will not be available to us for the rest of the year.  Some ideas were suggested for September and October meetings.  Once confirmed an e-mail will be sent out to all members, notifying them of meeting details.  It is possible that they will be on a Tuesday, other than the 4^th Tuesday of the month, so pay special attention to the date, when you get the email, to determine whether or not you’ll be able to attend.

 

 Submitted by Andrea Maire. Photos courtesy of Dianne Machesney and Colleen Fingal.