Re: Flowering time : latitudinal relationships?
- To: woodyplants@mallorn.com
- Subject: Re: Flowering time : latitudinal relationships?
- From: C* P* L*
- Date: Sun, 5 Dec 1999 14:10:37 -0600 (CST)
> I have several books that are basically collections of flowering times for
> a given area. One for Boston, written by Mable Sedgwick in 1907. She lists
> plants only for the months of March-September and dates are early,
> middle or
> late for any given month. In the preface, she writes "the season about
> New York is, generally speaking, ten days earlier. A rough and ready
> calculation allows six days' difference to every degree of latitude"
> Joseph Hudak compiled a similar book in 1976, which has since be reprinted
> by Timber Press. He is also in Boston, butclaims 3-4 days for each degree
> of latitude. Both of these books deal primarily with perennials.
Lisa, thank you very much for these great references!
> Incidently, if you would like to crosscheck some recent data, the MO
> Botanical Garden, www.MoBot.org , has posted plants in bloom, by week
> for several years.
That's also a great reference!
So, using the "indicator species" concept from the other post, I wonder
if I can find a correlation. For example, Aesculus glabra is found
blooming in Chicago from 29 Apr - 18 May.
Apparently it blooms at the Missouri Botanical Garden from 10 Apr - 23 Apr.
Can I apply this against other plants that bloom at the same time as
A. glabra?
Seems to work for Vaccinium corymbosum and Aquilegia canadensis...
But it's odd; Lindera benzoin is reported as blooming at the same time
in both places.
> If you ever decide to publish your records, I'll be in line to buy
> a copy
Actually, most of my stuff comes from two sources:
"Woody Plants of the Morton Arboretum" by the Morton Arboretum
"Plants of the Chicago Region" by Floyd Swink and Gerould Wilhelm
The first book lists most of the woody plants found on the grounds of
the Arboretum along with the location, a snippet or two about the plant,
and usual flowering time. It's about 500 pages long.
The second book is a masterpiece. Both authors worked at the Morton
Arboretum too, but they tended to wander around the Chicago area a lot.
Basically, it lists any plant that had been found in the "wild",
whether native or exotic, for each of the counties in the Chicago area.
It also lists flowering times for each of these species along with
plant associations along with a "coefficient of conservatism" rating.
It's about 900 pages long.
Chris
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