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Archive for September, 2012

Lingzhi mushroom (Ganoderma lucidum) in Sunnyside, Queens. Photo by Erik Baard.

Shoppers at the Sunnyside Greenmarket in Queens last weekend scooped up fresh regional produce yet sidestepped the prized Ganoderma lucidum mushroom growing at their feet.  This medicinal mushroom, more popularly known by Chinese and Japanese names, Lingzhi or Reishi respectively, is also indigenous to our region. You can find it at the base of common hardwoods filling our parks and lining our streets.

Identification of this fungus is easy — the upper fruiting body is often kidney shaped and is remarkable for looking glazed. Indeed, while Asian names reference divinity and immortality, the western scientific name derives from Greek and Latin roots for “shining bright skin. ” Apparently no one has studied the evolutionary advantage of the Ganoderma lucidum’s sheen.

This mushroom isn’t eaten because it’s bitter and tough, with a texture “like balsa wood or hard cardboard,” said Dr. Kathie T. Hodge, Associate Professor of Mycology and Director of the Cornell Plant Pathology Herbarium.  This mushroom comes into the kitchen is as a powder that some people mix with coffee, or use to wholly replace coffee. Whether powdered or extracted by boiling or alcohol, it’s consumed for believed health benefits.  Research into these potential benefits continues, but traditional uses include fighting tumors and viral infections, and generally boosting the immune system. The “red reishi” variety is considered more potent than the black.

Red reishi from below. Photo by “Wildman” Steve Brill (http://www.wildmanstevebrill.com/).

Is your curiosity is piqued? Harvest. “It will die this fall, so if you want to hack it off, now is the time,” said Hodge. Under the section of the fruiting body that looks glazed is a duller white section riddled with tiny pores. These pores release spores, which are carried by the wind. Once that’s complete, this whole upper section rots off, often consumed by a green mold. “If you find it green, it’s too old. Don’t use it,” Hodge cautioned. This mushroom is also consumed by some rather specifically adapted beetles, both beautiful and bizarre. Their presence might quash some human appetites.

Megalodacne fungus eating beetles. Photo by Kathie Hodge, Cornell University.

Bolitotherus cornutus fungus beetles. Photos by Kathie Hodge, Cornell University.

Foraging mushrooms can be dangerous, especially from urban tree pits. It’s best to go with an experienced forager to a natural area or to take a class, such as those taught by Gary Lincoff, author of The National Audubon Society Field Guide to North American Mushrooms and a New York Botanical Garden instructor. Or, Lincoff noted, it’s “sold in Chinatown.” Organic red reishi mushrooms are also sold at health food stores and online.

If you’re a determined forager finding only mushrooms that have gone green, don’t fret. They will grow back next year. Deep in the tree bark and roots is the mycelium — the complex base of the mushroom — ready to regrow a fruiting section next year. And check the maples, oaks, beech, sycamore, cherry, and birch trees in the vicinity. When spores land in a tree wound they take root and grow into new mycelia that then also fruit. The downside to Ganoderma lucidum  is that its feeding on lignan, a plant compound, weakens trees. Hodge cited research pointing to a 30-year life span for red oaks with this mushroom, but noted that the stresses of an urban environment might hasten a tree’s demise. The death blow is very likely to be a windstorm toppling the enfeebled tree. One interesting note is that many of the antioxidant and anti-carcinogenic benefits of Ganoderma lucidum are also attributed to lignans themselves.

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Red bat. Photo by Gil Lopez.

By Erik Baard

When New York City flies under the Gotham moniker, there’s a good chance Bat Man will show up in scenes of mayhem. But in this living city, residents usually have to work harder to spy bats, seeking them out in quiet corners or on professionally guided tours — sometimes with the help of modern technology.

That wasn’t the case for Woodside, Queens’  Gil Lopez, an edible landscape designer and urban farmer. Later in the evening after the great summer hail of August 15th, he emerged from his bedroom to find this red bat had flown into his apartment livingroom.

“He was cute. He had an adorable, fuzzy face and a little snub nose,” Lopez said. “When his wings weren’t spread out, he was no bigger than my fist. I could have held him in my palm.”

Red bat. Photo by Gil Lopez.

As it happens, Lopez waved his arms to steer the bat into the bathroom. The bat flew rapidly around his arm-waving host without making any contact, despite close quarters. Lopez was surprised by the bat’s “smooth, gliding flight” and that it was tracking him with its eyes. Contrary to popular mythology, bats have vision.

Lopez had thoughts of putting the red bat to work clearing mosquitos away from the urban farm he co-founded, but instead helped it out the bathroom window. Lopez’s five-minute encounter extraordinary; unlike the colonies of little brown bats that pack caves and other hollows in NYC, red bats live largely solitary lives among trees. Because there aren’t social, they’ve been spared the “white nose syndrome” afflicting other bats.

Red bats at rest. Photo by Lynn Robbins.

“I am surprised that one was found in a NY apartment,” said Lynn Robbins, a Missouri State University biologist who specializes in bats. But the hail storm may have played a role. “The only time people report them to me is after a storm, when their tree roost may not have provided them enough protection and they can show up anywhere, but in a man-made structure is not common.”

Lopez lives across Queens Boulevard from the quiet and leafy New Calvary Cemetery, a pretty ideal red bat habitat. A keen observer might spot them in normal conditions hunting for bugs around street lights glowing amid the deciduous trees of the graveyard.

Red bats might soon be even harder to spot. Their coloring (females are grayer) camouflages them against predators among autumn leaves, and when temperatures drop near zero, they dig down into the leaf litter and enter the low metabolic state called torpor. When asked if decomposing leaves leaves produced heat to sustain the bats, Robbins replied that the leaves are “probably just insulation over that big thermos called earth.”

Red bat camouflaged in autumn. Photo by Lynn Robbins.

Red bat in leaf litter. Photo by Lynn Robbins.

Red bats “can migrate long distances to enhance their survival,” Robbins notes. But a mild winter might yield more red bats — they bear up to five young in a litter, as compared to the two typical for bats. “If there is good weather and and plenty of food, their numbers can grow much more rapidly than other species,” Robbins said.

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