[CANUFNET] Tree "Sexism" in Canada: Call for information & thoughts

Wed Mar 4 19:46:47 EST 2020

of course!  I wrote that when I was recovering from a minor procedure, so
it all needs to be checked thoroughly!  Thanks for that.  Owen

On Wed, 4 Mar 2020 at 14:08, Gerard . <gerard at fortrees.com> wrote:

> Owen,
> Plants with both sexes on the same tree are monecious. Diecious trees have
> been only one sex or the other. Female poplar or willow trees can create
> issues that with  all the fluffy seeds that are produces, which can also
> become a fire hazard, in areas where they are common. Other trees, such as
> crabapples, have perfect flowers, with male and female parts in the same
> flower.
> Gerard Fournier
>
> Sent from my BlackBerry - the most secure mobile device - via the TELUS
> Network
> *From:* canufnet at list.web.net
> *Sent:* March 4, 2020 1:45 PM
> *To:* canufnet at list.web.net
> *Reply-to:* canufnet at list.web.net
> *Cc:* urbanforestryguy at gmail.com; rseltzer at treecanada.ca
> *Subject:* Re: [CANUFNET] Tree "Sexism" in Canada: Call for information &
> thoughts
>
> Most trees used in urban hard surface areas do not produce enough fruit to
> be bothersome in the way that has been described.  e.g. elms, maples, oaks,
> iron-wood, ornamental cherries and plums, beech, hornbeam, Korean dogwood
> etc
>
> Many ornamental trees that produce fruit can and should be used in park
> settings and people's where there are no hard surfaces to become
> sticky/slippery/smelly, as they provide food for birds and look gorgeous
> when in bloom. Examples would be hawthorns, crab apple, some dogwoods, etc
>
> Nut-bearing trees should also be considered for park spaces and yards, as
> they can provide food for both animals and humans, and don’t impact people
> negatively when planted away from hard surface areas.
>
> Edible fruit-bearing trees should be planted by home-owners  and in
> community garden areas to be ‘slow’ food sources that do not have to be
> transported and can be picked ripe and consumed fresh.
>
> Most conifers planted as ornamentals have both sexes on the same tree
> (dioecious) so sex selection is not an issue.  However, those that produce
> large cones should be planted in garden beds to prevent nuisance issues
> from arising.
>
> Here in the coastal areas of British Columbia, pollen from native trees
> such as black cottonwood, growing in ravines and other natural areas, fills
> the air in the spring, probably in greater volumes than produced by
> non-native urban trees.
>
> We want to encourage pollinators, not discourage them, so plant females
> that flower!  As always, plant trees that are suitable for the spaces in
> which they will grow to maturity.
>
> Owen Croy
>
> On Wed, 4 Mar 2020 at 07:04, Rebecca Seltzer via CANUFNET <
> canufnet at list.web.net> wrote:
>
>> Hello everyone,
>>
>>
>>
>> We at Tree Canada just received some questions from a reporter at the
>> Guardian, and I thought it would be good to share with the wider urban
>> forestry community. Please do contact Ally Hirschlag directly with your
>> comments.
>>
>>
>>
>> *Context:*
>>
>> “Male trees are cleaner and easier to manage than female trees. Unlike
>> their female counterparts, distinctly male plants produce pollen but do not
>> produce seeds, pods and fruit, which fall to the ground and create mess.
>> Female trees also attract pests, including bees, because they provide a
>> source of food.” Source
>> <https://globalnews.ca/news/5403667/botanical-sexism-climate-change-asthma-allergies/>
>>
>>
>>
>> “Commercial horticulture produces vast numbers of all-male clonal
>> selections from dioecious plants […] Close to 100% of all the ash (
>> *Fraxinus)*, poplar (*Populus), *pistache *(Pistacia), *bay laurel *(Laurus),
>> *junipers* (Juniperus), *willows* (Salix), *gingko tree *(Gingko), *
>> Griselinia* (Griselinia), *mulberries* (Morus), *yellowwood*
>> (Podocarpus), *locust* (Gleditsia) *and logwoods *(Xylosma) *sold are
>> clonal males.” Source
>> <https://books.google.ca/books?redir_esc=y&id=pAJCDwAAQBAJ&q=clonal+males#v=snippet&q=clonal%20males&f=false>
>>
>>
>>
>> *The questions:*
>>
>>    - In Canada, has there been a significant proportion of entirely male
>>    trees or male clones planted in urban areas? Why has this trend been
>>    perpetuated?
>>    - Has this caused an uptick in pollen dispersal in urban communities?
>>    - Do you know of specific communities in Canada looking to lower
>>    their pollen count by adding more female trees and/or less allergy-causing
>>    pollinators?
>>    - What else are communities in Canada doing to combat worsening
>>    allergies in urban or suburban areas due to high tree pollen counts?
>>
>> *Contact information:*
>>
>> Ally Hirschlag
>>
>> ally.hirschlag at gmail.com
>>
>> 2013144322
>>
>>
>>
>> Thank you all!
>>
>>
>>
>> [image: TreeCanada Logo]
>>
>> *Rebecca Seltzer*
>>
>> Program Assistant | Assistante de Programme
>> treecanada.ca  arbrescanada.ca
>>
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>>
>>
>>
>>
>
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