John George JACK was born in Canada in
1861, but was of Scots descent, his Grandfather John JACK having
immigrated to that continent from Scotland in 1831.
His family were descended from the Jacks
of Braco in Perthshire, Scotland, and as such, John George JACKS family
are very likely to have been related to David Jack, the famous Crieff
born, Californian Land Baron, and Dairyman of the 19th Century, whose
family also originated from Braco, and who is widely regarded as being the
creator of the famous Monterey Jack cheese. David Jack was no average
Agriculturist himself, being amongst the first to introduce irrigation to
the dry lands of the Salinas Valley in California.
John JACKS ancestors are known to have
farmed at Middle Fedal Farm, Braco, Perthshire, from as early as 1700.
The Braco Jacks were small farmers and indeed it would appear the family
had a penchant for agriculture and horticulture coursing through their
John George JACK was born in Chateauguay,
Quebec, Canada on 15 April, 1861. His mother Annie L. JACK was a
well-known horticulturist who produced a series of articles under the
title of Garden Talks and wrote a handbook on The Canadian Garden.
Johns education was undistinguished and did not extend beyond high school
level, but clearly he inherited his mothers love of the subject and
through long study and practical experience developed a thorough knowledge
of plants. 3
He spent two winters studying entomology
with a Dr H.A. Hagen, and he spent the summer of 1883 working in the
experimental grounds of a Mr E.S. Carmen who was Editor of The Rural New
Yorker at River Edge, New Jersey.
In 1886, Jack went to the Arnold Arboretum
at Harvard University to work and study under Professor C.S. Sargent. As a
working student he earned a dollar a day. However, he took full advantage
of this opportunity, and in time became an acknowledged expert in
detecting variations and species hybrids. His work gained the confidence
of Sargent and Jack checked identifications of plantings on the grounds
and contributed a column Notes on the Arnold Arboretum which regularly
appeared in the publication Garden and Forest. In 1891 Sargent
recommended that Jack be appointed as a Lecturer in arboriculture. This
was prompted in large part by Jacks ability to communicate his knowledge
of the subject to an interested audience, something which despite his
academic eminence, Sargent had an aversion to doing. 5
Jacks classes at the Arboretum were geared
towards the interested amateur, which considering Jacks own background in
the subject, probably suited him well. Jacks enthusiasm and friendly
disposition made his courses very popular. Despite suffering from
red-green colour blindness Jack was skilled at identifying and selecting
the plants he saw. Jacks lectures became an annual feature and helped
raise the profile of the Arboretum and the work being carried out there.
Jack spent the summers of 1898 and 1900 as
an agent of the Geological Survey and of the Department of Agriculture of
the United States, in the course of which he explored the forests of
central Colorado and of the Big Horn Mountains of Wyoming. He also served
as an Instructor in Forestry at Harvard from 1903 to 1908, and was
Lecturer in Forestry at the Massachusetts Institute of Technology from
1899 to 1908. He was appointed an assistant Professor of Dendrology at
Arnold Arboretum in 1908. 7
Jack travelled extensively to study various
species and this included trips within Canada and to the United States and
the Far East. 8
In 1891 he paid visits to botanic
gardens and nurseries in France, Germany, Italy, Denmark and England.
In 1904 he returned from a trip to
Alberta, Canada with Professor Alfred Rehder, in possession of the dwarf
white spruce, Picea glauca conic. 10
In 1905 he decided to take a trip to the
Far East, such as his mentor Sargent had done earlier. Jack had to finance
this trip on his own as the Arboretum had little money to devote to
exploration. He financed his trips from outside sources as he only earned
$500.00 a year. During this trip Jack did not venture into dangerous
Mainland China but concentrated his efforts around Northern Coastal towns
where he searched for outstanding cultivated species.
However, he spent the major part of his
time in the Far East in Japan and Korea. At that time Korea had been
little explored by collectors and he was unable to wander freely there due
to the Russo-Japanese War. After spending about a year out East, Jack
returned to North America with some 650 kinds of seeds and seedlings of
both wild and cultivated plants, including some of which had never been
grown in the United States.
Among other things, he brought back the
only Winter Hazel reliably hardy in New England, Corylopsis
glabrescens, a new cork tree, Phellodendron lavallei, the Davidhemiptelea, Hemiptelea davidii, and a superior
cultivar of the Siberian Crabapple, Malus bacata jackii. He
also acquired seed of the Royal Azalea, Rhododendron schlippenbachii,
and a compact single flowered form of the Yodogawa azalea,
Rhododendron yedoense poukhanense. Both of these Rhodeodendrons
are now commonly found in gardens in North America.
In 1907, Professor Jack married Cerise
Emily Agnes Carmen, who was daughter of Elbert S. CARMEN publisher of the
Rural New Yorker. They had no family of their own, but adopted two
children. Cerise Jack died in 1935. The couples daughter Betty Wirth and
her husband lived with the Professor in his later years at "Folly Farm" in
East Walpole. 14
John Jack was as hardy as some of the
specimens he was so interested in and aged 75 years was known to rise at
6am, work all day, often venturing into the countryside on horseback and
working on until 11 or 12 oclock at night. At age 85 years he still
lovingly tended to his garden, but complained about being unable to work
after supper. He published many hundreds of papers throughout the years
and contributed many articles in various horticultural journals. He
retired from full time employment in 1935.
John George JACK, by then Assistant
Professor of Dendrology, Emeritus, at the Arnold Arboretum, died at "Folly
Farm", aged 88 years. He had been confined to his bed since August 1948
having fallen and broken his hip while tending to his Orchard.
Jacks enthusiasm for his work shone
brightly, and all who knew him found him to be a friendly, interesting,
and knowledgeable teacher of field classes who contributed significantly
to the various fields of Natural History. In recognition of his work the
following species were named for Professor Jack: -
Sinojackia Hu, a new genus with two species
Alnus Jackii Hu ( A, tuberculosa Hand.-Mazz).
*Amelasorbus Jackii Rehd.
*Betula Jackii Schneid.
Crataegus Jackii Sarg.
Juniperus communis var. Jackii Rehd.
*Populas Jackii Sarg.
*Quercus Jackiana Schneid.
Rosa Maximowiczii var. Jackii (Rehd.) Rehd. (R. Jackii Rehd.).
*Sorbaronia Jackii Rehd. (Pyrus Jackii [Rehd.]
*Viburnum Jackii Rehd.
Professor Jack discovered the hybrids
marked with an asterisk. 17
Glossary of terms
Agriculturist one versed in the art of
Horticulturist - one versed in the art of cultivating gardens
Dendrology - the natural history of trees.
Entomology - the science of insects
Arboretum - a botanic garden of trees
Arboriculture - forestry; the culture of trees; especially timber trees.
Hybrid Species - an organism, which is the offspring of a union between
different species or varieties.
Chambers - 20th Century
John JACKS ancestors farmed at Middle Fedal,
Braco, which is situated on the Braco to Kinbuck Road and is only a few
miles on the Kinbuck side of Silverton Farm, Braco where David Jacks
ancestors farmed. The Register of Testaments of the Commissariot of
Dunblane, 1535 1800 show families of Jacks at both farms for a
considerable length of time.
Norman Jack of Canada, John George Jacks great
nephew confirms that his ancestors left Middle Fedal and moved to the
Alloa area following many decades of farming at Middle Fedal.
Journal of the Arnold Arboretum, Vol. XXX,
October 1949, Number 4.
Footnote to page 105 of Silva of North America
by C.S. Sargent, Vol. 13, (1947)
Charles Sprague Sargent and the Arnold
Arboretum, SB Sutton, Harvard University Press, Cambridge,
One of Jacks findings around this time was
Crataegus Champlainensis which is referred to by C.S. Craigen "a
tree from fifteen to twenty feet in height, with a tall stem eight or
ten inches in diameter covered with dark deeply fissured bark broken on
the surface into thin loose plate-like scales, and stout wide-spreading
branches which form a round topped and often symmetrical head Crataegus
Champlainensis grows on heavy clay soil, and is a frequent inhabitant of
the limestone ridges of the Champlain valley, from Middlebury, Vermont,
and Crown Point, New York, northward, and of the valley of the St.
Lawrence, where it has been found at Chateaugay, Adirondack Junction,
and Caughnawaga in the Province of Quebec, and where it was discovered
in September, 1899, by Mr. J.G. Jack.
Journal of the Arnold Arboretum
Arboretum Explorers, Vol. 22, Page 48, New York
Botanical Garden, April 1972.
Journal of the Arnold Arboretum
The Author expresses his thanks to Library
Staff at the Arnold Arboretum of Harvard University, 125 Arborway, Jamaica
Plain, MASSACHUSETTS for supplying materials used in the compiling of this
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