Tag Archive: mushrooms


cottonwoods fallen budsCottonwoods seem to get a whole lot of bad press and not enough praise.  As soon as the fluff starts to fly in late spring/ early summer people seem to want to gripe about it. Oh sure, some do enjoy the warm season snow, delicate as goosedown, swirling, lofting and icing the sidewalks. It’s a little magical when the flurries are a-fly. I promise  it is not making you sneeze, it’s just what you see in front of you while other tree and grass pollens play merry hell with your sinuses. Cottonwood pollen is released long before the flurf flies- that’s actually the mature seed with a silken sail attached.

There’s also the abundant branch shedding, of course.  It’s not a tree for the obsessively tidy. It’s branching is abundant, even shaggy, and the wood snaps easily in high winds, leading to littered landscapes.  (But if you have a chipper, or are a wizard with the shears, lots of lovely ramial wood chips for soil improvement.)  It rots quickly and also makes great mushroom logs if you have larger diameter fallen branches to dispose of.

I notice when I look up cottonwood trees, everyone writes as if the local tree is ‘THE’ cottonwood.  In fact, it’s a large number of populus that people call “Cottonwood”. In the West coast of North America, my ‘hood, it’s Populus trichocarpa. Most widely distributed is Populus tremuloides (mainly Canada, but found as far south as central Mexico.) Populus deltoides mainly from the central and East USA, but a bit into the Southern Canadian prairies. Populus grandidentata in the East in a swoosh from the Great Lakes to the coast. There’s a whack of them. If you care to make a precise ID of your particular poplar (yes, I also mean cottonwood)- check the ranges. Google ‘Populus’ with your state or province and you should be able to figure out which one you’re looking at. It also hybridizes easily where ranges intersect- just to throw a curveball into your I.D.  It’s not limited to the Americas either- Europe and Asia have plenty of poplars, too.

All varieties can be used in much the same way, though, and while one variety might be medicinally superior, I don’t know which. I’d need a lab and USDA level access to fresh samples. The spring bud resin of any can be used to make a soothing anti-infammatory salve.  Also called Balm of Gilead, use of cottonwood bud salve is very old and very widespread- you can find it in Culpeper’s Compleat Herbal, Russian formulas using bear grease, the Salish peoples of the Pacific Northwest-essentially, everybody who has had access figured out this tree’s resin was a storehouse of medicinal power. Collecting windblown buds in early spring seems the epitome of ethical wildcrafting!cottonwood buds

Poplars grow fast. I guess you might need to, when your substrate is quite likely to shift without the stabilizing influence of your roots. They prefer moist soils, rivers and lakes in most varieties, but definitely abundant surface moisture when the seeds sprout, since they are viable only for a short time.  Water probably distributes as much seed and live material as the air filled with ‘snow’. My nearby Fraser River has large islands in the middle of it essentially made of cottonwoods alone, catching the suspended silt and sand. They shift position stealthily on dark nights…. well, maybe not that fast, but they do creep around. Cottonwood roots easily from dropped branches in spring, and sprouts vigorously from deer and beaver-girdled young trees, it’s a very vigorously alive tree.  Propagation is ridiculously simple.  A tilted log may become a mother of thousands.

The classic river or lakeside profile of the local cottonwood is crowded, shaggy, swoopy- classic cottonwood profilethe branches seem to sag under their own weight, and then optimistically rise up at the tips, almost making an ‘s’ with longer branches. When older, trunks grey and fissure, growing corky. When young they grow in gregarious groups, but are very shade intolerant trees, so tend to grow in groups of similar age.  Young seedlings soon expire in the heavy shade of abundant parent trees.

Cottonwoods can live a few hundred years- as much as 400, but usually don’t.  Typically cottonwoods succumb to rot, or undermining by water, or some other accident at 70-100. Living on riverbanks can be precarious.  They often break records for girth within their span, however.  The largest trees in both Manitoba and Saskatchewan are cottonwoods.

Early settlers would keep an eye out for cottonwood when travelling, as it’s presence indicated water.  They made frequent and widespread use of the fast growing tree for windbreaks, fenceposts, firewood and basketry. Wherever cottonwood is found, the people living among them have a history of use.  The Salish called it ‘The Tree of Life’, the Mojave people used it for practically everything one might use a tree for, the Hopi carved the roots into Kachina dolls. It’s a symbol of benevolent spirits and abundant life wherever it grows. The cambium is edible, and even tasty when the down is flying.cottonwoods branchy br

Other Uses

The wood of the tree itself isn’t as soft as the breakable branches might imply, and makes a very serviceable lumber. It’s fairly soft for making furniture with but oiling it helps prevent scratching and denting, and using it for things like trim or moldings is just fine. Since it grows so fast, that makes it quite a good choice for agroforestry projects. The trees can be coppiced for animal fodder. The wood holds inks unusually well, and makes excellent boxes and baskets, cut thin. Approved by the FDA for food containers and very workable, cottonwood also makes good bowls and cups. It’s light and ideal for models and children’s toys. As firewood it makes 16.8 million BTU’s per cord- not great, actually-but abundant! Cottonwood that has fallen as a result of rot smells a little funky though, so you might want to save that for outdoor fires.

Often thought of as a ‘waste’ tree, cottonwoods are in fact a storehouse of medicine, fast wood, wildlife support and great permaculture potential. See if you can find some at a river near you!

Fun Fact: Pando is a clonal colony of Populus tremuloides in Utah so big that it’s the heaviest (and at an estimated 80,000 years, one of the oldest) known organism.

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The Oaks of Song and Story

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Photo by Aleksander Kaasik

Few trees have the immense history, the personality, and garner the reverence that Oaks do. Oaks are legendary. Although they are not the world’s longest lived trees, they may stand for many centuries, even a millennia, and reach great height and girth.  Some have  become well known as individuals, standing impassive through the rise and fall of man’s short ages and empires, shading one generation after another.

Notable Oaks

The Ivenack Oak  in Mecklenburg, Germany is 1200 years old, and called the King of German Oak Trees. France’s sacred Chapel Oak (Chêne chapelle) has two chapels that were

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Chene chapelle photo by Ji-Elle

built into the hollow trunk in 1669 and a staircase encircling the base of the tree. Hit by a lightning strike when it was about 500, the center burned out but the oak continued to grow, the local Abbot Du Detroit and the village priest, Father Du Cerceau, determined that the lighting striking and hollowing the tree was an event that had happened with holy purpose. So they built a place of pilgrimage devoted to the Virgin Mary in the hollow.  In later years, the chapel above was added, as was the staircase. The Rumskulla Oak of Sweden is acknowledged as the widest Oak in Europe at 14.4 metres, and the most famous tree in Poland is the Bartek Oak, which sheltered King Casimir III (1310–1370) and his court, as well as King Jan III Sobieski, who rested under the oak on his way back from the Battle of Vienna (1683)

There are multiple notable Oaks in Britain, the Sherwood Forest Major Oak, famous for it’s connection to Robin Hood, the Bowthorpe Oak with a hollowed centre capable of holding a dinner party of 20 people (for which it was used in the past), and several Oaks believed to be older than the country of England itself, within the boundaries of Severnake Forest,  the only privately owned ancient forest in England.

The Oak is sacred to many people, although perhaps most famously in western culture to the Celts. When one mentions the sacred Oaks, the prevalent imagery is of a grove of ancient Oaks venerated and whispered to by druids, yet there are Oaks as esteemed and sacred on the opposite side of the globe we easily forget.  In the Oley Valley, Pennsylvania there is a great Chinkapin Oak looked upon as the shrine tree of the Lenape people who were the original inhabitants of the region:

According to legend, a beautiful woman, the wife of a powerful chief, became very ill. All the tribe’s medicine men were called in; they administered many medicines, to no effect. Slowly, the chief’s wife became weaker and sicker. Finally, desperate for a cure, the young chief traveled to the Sacred Oak and there prayed to the Great Spirit for his wife to be saved. When he returned to camp, his wife was well again. Several years went by and the tribe was threatened by a hostile tribe. Once again, the chief traveled to the Sacred Oak and prayed to the Great Spirit, who gave him guidance. The warring tribes smoked the peace pipe together under it’s canopy.  Horticulturist Rachel Theis, who owns the land the Oak sits on, estimates the age of the tree as 500+ and most notably the Oak is of a species not found in the region, an aberration that may have been a trade item, making it all the more special.

Practical Uses

Acorns have long been an important carbohydrate source for people who still forage for food, and we are coming back to that as we try to find alternate sources of carbs that don’t require massive monocultures or ridiculous inputs to grow them.  Oaks are a prime example of hundred year + planning when designing a permaculture landscape, in fact a hundred year old oak is just a baby. You will have to wait a bit if you’re planting young oaks-they generally take about 20 years to produce acorns. Oak will eventually give you and all the nut-eating animals around you a large amount of available calories if you care to put a little time into the shelling, leaching and grinding. Excellent instructions on how to eat acorns, and which varieties are best for what, can be found here at Hunter Gardener Angler Cook. You may need a whole lot of space to process enough for large amounts of flour. The foragers I know who do this use an entire, tarped room to collect and sort the acorns.

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Acorns photo by Norman Walsh

Wood is, of course, an excellent reason to grow oak. Many of the massively wide and incredibly twisted forms of ancient oaks were created by pollarding, the practice of cutting off the top part of a tree to produce a regrowth of a dense and bushy crown, generally for firewood or livestock feed. One year’s growth makes ‘tree hay’- small branches of fairly even size in abundance, while waiting five years or so produces many branches of even size that can be used in woodworking or light construction.  Strong, durable, easy to work and rot-resistant, oak is an extremely useful wood to have handy, and makes excellent firewood (White oak will produce 26.4 million BTU’s per cord.) Big boards require big trees, but firewood for rocket stoves and wood for durable furniture and tools are easy to come by with a few oaks available to sustainably harvest.

Medicine is another reason to utilize oak.  Oak possesses the following healing properties: astringent, fever reducing, tonic, antiseptic, anti-viral, anti-tumor, and anti-inflammatory actions. In addition, oak has been used to get rid of worms and other parasites. Number one use on my list, which is also kind of a cautionary tale, is stopping diarrhea. A simple tea made of the leaves or a bark decoction will also certainly constipate you if you’re not running to the john, so fair warning. Go easy on the internal use until you have some idea of how much it’s going to bung you up. This is another reason why most acorns require quite a bit of leaching before they are ready to be eaten.

A fast poultice of oak leaves can be used to bring down swelling and reduce irritation due a wide variety of problems like insect bites, poison ivy, or (ahem) hemorrhoids. 

The abundant tannins lend themselves to a whole host of other uses around a homestead.  Tanning hides with oak is old as the hills, although certainly not the only tree you can use.  Braintan.com has done a great job explaining how to go about the process.  Oak chips and leaves can be used to clarify and flavour beer or wine. Oak galls can be used to make a good dark ink. Oak leaves take forever to break down, (usually two-three years) so shredded leaves added to a compost pile are more a’brown’ material than ‘green’, but help to make a very stable mulch. Yes, they are acid, but it’s a weak organic acid and composting down oak leaves isn’t going to seriously affect your soil pH, unless you pile up a literal ton of fresh leaves in one spot.

Oak makes good mushroom logs (highly recommended for shiitake), and also is a host tree for delicious boletes, chanterelles and (nomnomnom) truffles.

Acorns make excellent pig and goat food, right around the time you might want to fatten them up.  An oak tree sited to hang over their pen, or being allowed to forage under oaks in acorn season adds nutrition and easy carbs to their diet without any work from you.

Oak makes microclimates. An old oak tree can be BIG- really, really big.  A hundred foot spread is an entirely reasonable expectation. Keep that in mind when siting a new tree or creating guilds.  One large tree can pump out a huge amount of water into the air via transpiration, change the nature of the ground under it with shading and yearly mulch, keep plants from the harshest of winter damage, even while leafless, and provide windbreaks and shelter in a field.

I’d like to make some notes about guilding with oaks here, but in reality your first considerations should be root competition and shade when guilding, because oaks are pretty convivial. Toby Hemenway did some research on the Oregon White Oak community and came up with these natives growing with White Oak: California Hazelnut, Pacific Madrone, Mazzard Cherry, Black Hawthorn, Saskatoon Serviceberry, Creambush Oceanspray, Round-Leaved Snowberry, Thimbleberry, Trailing Blackberry, Sweetbriar Rose, Broad-Petaled Strawberry, Poison Oak, Yerba Buena, Sweet Ciceley, American Vetch. From that, I’d say you’re safe with hazelnuts, any kind of Prunus, Amelanchier, strawberries, any Rubus, Ribes or Rosa, and leguminous ground covers. Ramps should work well in the dappled shade underneath. Garry Oak Ecosystems data may be useful in creating effective guilds as well- I know I’d sure love to see more mass Camas plantings!

Hope this helps you in valuing your Oaks, if you have some, or inspires you to try something new with them. Happy gardening!