next message in archive
no next message in thread
previous message in archive
previous message in thread
Index of Subjects
Index of Subjects
Quoting Jim Wolford <jimwolford@eastlink.ca>:
> On Sept. 3 Martin Thomas wrote me the following note in response to
> mine, and he includes the Scots' Bay expanding colony of pink
> jewelweed (Himalayan Balsam) that Ian McKay just reported. Jim in
> Wolfville
>
>>
>> I have been checking up on Impatiens capensis and pallida in NS,
>> largely because of the great differences in specific
>> characteristics in various descriptions in available books and
>> because if one looks at large populations of capensis around here,
>> the variations within that species are huge.
* there's amazing variation in just the stature of I. capensis in
Ontario. In 2008 we saw stands on bare pitted limestone Lake Huron
shores that were only 10 cm tall, and along the Rideau River, around
piled aquatic vegetation dredged from a swimming area, 2 m tall plants
that had stems 3.5 cm in diameter. We wondered how much of this was
due simply to nutrient supply and other environment, and how much
genetic adaptation separated these populations.
fred.
------------------------------------------------------------
Frederick W. Schueler & Aleta Karstad
Daily Paintings - http://karstaddailypaintings.blogspot.com/
Vulnerable Watersheds - http://vulnerablewaters.blogspot.ca/
study our books - http://pinicola.ca/books/index.htm
RR#2 Bishops Mills, Ontario, Canada K0G 1T0
on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
(613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/
striving to be, with Rachel Carson,
"fanatic defender[s] of the cult of the balance of nature"
------------------------------------------------------------
next message in archive
no next message in thread
previous message in archive
previous message in thread
Index of Subjects