I recently purchased the massive Conifers Around The
World, and had to lug it ten blocks back to my car. It is authored by two
Hungarians, Zsolt Debreczy and Istvan Racz, who began their venture in the mid
1970's. The two volumes, with over 1,000 pages and a few thousand photos,
seemingly misses nothing, no matter how obscure, and includes many species I
have never heard of before. I have always imagined that if I was stranded on a
deserted island, I would be perfectly happy if I had enough food, a pretty hula
girl, and the Oxford English Dictionary. But maybe now I would take the food,
the girl, and the conifer book.
My first night with the book--at home, not on my fantasy
island--I read about the wealth of coniferous species in China. Some are rare,
some not, and again there is a sizeable group that I have never heard of
before.
So today's blog will focus on some of these species, ones
that I have grown for profit, and others where I have just collected one tree
for the Arboretum.
Abies (or "True Firs") are well represented in
China. I like them all, but my favorite has to be Abies squamata, the
"Flaky Bark Fir." Although it is native to dry habitats on the border
with Tibet, and can be found at an elevation of 15,000 feet, nevertheless it
succeeds quite well in the Flora Wonder Collection. I've also seen it thrive in
Germany, and a particularly impressive specimen exists at Arboretum Trompenburg
in Rotterdam. I presume these are seedling grown, but mine are produced by
grafting (as low as possible) onto practically any Abies rootstock, with
hardiness and soil adaptability being the important factors.
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Abies squamata |
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Acer griseum |
The main feature of Abies squamata is the beautiful
exfoliating bark. The photos above show a great similarity to Acer griseum. The
foliage of squamata is as attractive as any other Chinese species, and it
sports deep blue cones. We have had crops of six-year-old trees cone, and at
the same age the bark is already noticeable. It is certainly one of my most
favorite of all conifers.
I'll mention one other Abies species from China, Abies
beshanzuensis, not because it is more attractive than the others, but because
it is extremely rare, indeed the "rarest conifer in the world,"
according to Debreczy and Racz. My trees resemble the photos in their book, so
I suppose I have the correct species, but of course I don't know for certain.
So if there were only eight trees in existence at their discovery (1975), which
is now reduced to only three, how did I get it, and furthermore, should I even
have it at all? Scions were sent to me by a botanist--I won't say who--about
twelve years ago. He used to ship to me a number of other rare conifers, and
even though the scionwood was old and scrappy, usually at least one would
survive. I had no idea at the time, however, that beshanzuensis was endangered.
I have propagated it on various rootstocks, and when available, Abies firma,
which it resembles, might be the best choice. To date none of my trees have
coned, in fact that's its problem in the wild.
An obscure conifer species, but one that I like, is
Amentotaxus argotaenia, the "Catkin Yew." Sadly it is only hardy to
USDA zone 8, and my one tree currently resides in our tropical Greenhouse 20,
our unprofitable, but fun house. It does resemble Taxus, or "yews;"
in fact the catkins are known as aments, hence the name. Red berries
will occur at branch tips, although my ten-year-old tree has not yet fruited.
Calocedrus macrolepis is a beautiful species, but it too is
not very hardy (USDA zone 8) as it comes from southern China in Yunnan
province. This "Chinese Incense Cedar" features flat sprays of
blue-green foliage with silvery-blue undersides. Its texture and appearance are
more appealing to me than any Thuja or Chamaecyparis, and also more so than its
sister species, decurrens. This winter I'll graft a few onto decurrens, which
is plenty hardy, and eventually plant one out. Calocedrus means "beautiful
cedar."
Cunninghamia lanceolata is known as "China Fir,"
and it is frequently planted as a forest tree, for the trunks are usually
straight for this fast-growing species. It is rarely used in American
landscapes for a number of reasons: when it is not totally happy it can be
ugly; old needles persist, so when damaged, or browned from extreme cold, the
tree will look practically dead for a few years; and finally the needles are
sharp as hell, so it is not friendly to the touch. My grandmother in Eugene,
Oregon had a hedge of Cunninghamia, which served well to keep the neighbor dogs
and children out of her yard. Very strangely, near the airport in Hillsboro,
Oregon, a planting of Cunninghamia was used in the highway divider. I don't
think 99% of the landscape architects know anything about the species, but
apparently one did.
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Cunninghamia lanceolata 'Bánó' |
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Cunninghamia lanceolata 'Glauca Prostrate' |
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Cunninghamia lanceolata 'Glauca' |

Cunninghamia lanceolata 'Glauca'
The cultivar 'Glauca' can be attractive, and a wonderful specimen exists just two miles from Flora Farm in a lower working-class neighborhood. I photographed the cultivar 'Bánó' somewhere--I can't remember--but I do not grow it. At Arrowhead Alpines in Michigan I encountered a specimen with no intention of producing a leader, and they dubbed it 'Glauca Prostrate'. My plants of it also tend to grow laterally, but eventually, I'm pretty sure they will develop a leader or leaders. But woe if you have to pull weeds next to the vicious blades.
Cathaya argyrophylla is the "Chinese Silver Fir,"
and is described in Conifers Around The World as "unique a living
fossil as the Great Panda of China..." Well, the public won't be lining up
to view it I'm sure, but it is a very pretty conifer, and most photogenic don't
you think? The needles are gray-green with silvery undersides, hence the
specific name argyrophylla, but unfortunately the small cones are ugly little
turds, as photographed here last year, and would be of no value except to
propagate more. We can root the species, but never do very well.
Just what is Cathaya, other than meaning "from
China?" Early on in my career it was the "holy grail" of
conifers, though only hardy to USDA zone 7. Every conifer collector would die
to have it, but China was emphatic that it belonged to China, that nobody
was going to get it. A story went around that three Chinese individuals were
caught trying to smuggle out Cathaya, and they were summarily executed. It is a
believable story unfortunately.
So anyway we eventually received some seed which germinated.
When I mentioned Just what is it?, the question was pertinent, because it was
its own genus, and what could be used as understock? Some suggested
Sciadopitys, or Larix or Pseudotsuga. Even Abies. I haven't tried any of the
above, but maybe should, as our rooting propagation ranges from low to dismal.
And I'll keep my seed source secret so the Chinese won't come calling.
My final thoughts about Cathaya are derived from reading Chris Callaghan's excellent article Cathaya argyrophylla, some little known facts in the International Dendrology Society's 2011 yearbook. For example "...few people outside of, and probably within, China (including myself until recently), would know that the botanical discovery of Cathaya, recorded for 1955, was actually 17 years earlier and preceded that of Metasequoia glyptostroboides, the other more renowned Chinese 'living fossil' found by T. Kan in Hupeh in 1941, by three years."
Later he writes "It is interesting to speculate that had Cathaya seeds or plants been brought out of China before the war, whether it would have shared some of the fame enjoyed by Metasequoia today, instead of sinking into virtual obscurity everywhere other than China."
Callaghan furthermore projects that Cathaya should be upgraded to endangered status, as fewer exist than with the Metasequoia population. In China a nature series, Forest China, filmed a program entitled Hermit of the Forest, and in the program the Chinese give Cathaya the ultimate accolade, "the Lord of the Firs."
My final thoughts about Cathaya are derived from reading Chris Callaghan's excellent article Cathaya argyrophylla, some little known facts in the International Dendrology Society's 2011 yearbook. For example "...few people outside of, and probably within, China (including myself until recently), would know that the botanical discovery of Cathaya, recorded for 1955, was actually 17 years earlier and preceded that of Metasequoia glyptostroboides, the other more renowned Chinese 'living fossil' found by T. Kan in Hupeh in 1941, by three years."
Later he writes "It is interesting to speculate that had Cathaya seeds or plants been brought out of China before the war, whether it would have shared some of the fame enjoyed by Metasequoia today, instead of sinking into virtual obscurity everywhere other than China."
Callaghan furthermore projects that Cathaya should be upgraded to endangered status, as fewer exist than with the Metasequoia population. In China a nature series, Forest China, filmed a program entitled Hermit of the Forest, and in the program the Chinese give Cathaya the ultimate accolade, "the Lord of the Firs."
I won't repeat the discovery of Metasequoia
glyptostroboides, the "Dawn Redwood," and its "living
fossil" acclaim, as it has been told many times before. It will quickly
grow into a huge tree with a beautiful fluted trunk--and you know I am a trunk
man. I especially like the tiny cones, as they look like miniature
Sequoiadendron cones, except that the Metasequoia are cubically shaped,
something my children find appealing. Meta is a Greek word meaning
"after," "beside," "with" "like" or
"akin to." Strange that two Chinese botanists, Hu and Cheng, would
use a Greek prefix for their wonderful new genus, but then it was also strange
that the British tried to cram Wellingtonia down our throats, and that
Sequoia, the name of a Cherokee Indian leader was used for the coast redwood,
the tallest tree on earth, and then Sequoiadendron eventually for the most massive
on earth.

Left: The original Metasequoia glyptostroboides 'Kools Gold' in Holland.
Right: Nelis trying to hide from the camera.
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Metasequoia glyptostroboides 'Kools Gold' aglow in the evening light |
'Kools Gold' is known as 'Golden Guusje' in Europe.
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Metasequoia glyptostroboides 'Gold Rush' |
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Metasequoia glyptostroboides 'Gold Rush' |
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Metasequoia glyptostroboides 'Miss Grace' |
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Metasequoia glyptostroboides 'North Light' |
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Metasequoia glyptostroboides 'North Light' |
Metasequoia is a handsome tree, but requires a park or large
estate to accommodate it. Much preferred horticulturally are the various
cultivars. I'll only list them, as I've promoted them many times before: 'Kools
Gold', 'Gold Rush' (or 'Ogon'), 'Miss Grace' and 'North Light'. One of my
"fantasy" trees, would be to find a bright powder-blue form. Then it
would become my first-ever tree to patent, and I would become wealthy, and I
could finally retreat to my deserted island after all.
I can't continue after that fantasy, so Chinese Conifers,
Part Two will continue next week.