Friday, April 2, 2010

Plant of the Week

Snow-on-the-mountain
Euphorbia marginata Pursh
other common names: mountain snow, variegated spurge, white-margined spurge, wolf’s milk, milkweed (incorrect)
Euphorbia: named in honor of Euphorbus, who was a physician to King Juba of Numidia
Marginata: alluding to the broad white margins of the leaves, especially the upper leaves of the plant
Spurge family: Euphorbiaceae

Wednesday, March 31, 2010

An Interview with Donald Huffman: Part 3

What advice would you give to beginning biologists? What are the particular challenges of being a biologist in the Midwest?
My advice to beginning biologists is to avoid being too narrow in basic science studies. Considering the importance of cellular and molecular-level biology in the past 50 years, don’t limit yourself to studying organismal or population-level biology. There is a tendency to specialize, but I feel this should be postponed until at least the graduate level, because you cannot predict how useful molecular and cellular techniques and knowledge may be in understanding any group of organisms. It goes without saying that anyone wishing to become a biologist should take advanced courses in chemistry and physics as well as math.

The challenges to a Midwest biologist are about the same as those encountered elsewhere. A broadly trained biologist should be able to function readily in any part of the world. Each region has its own peculiar challenges, and one of the greatest challenges in the Midwest is to understand the problems and solutions arising due to overuse of land for agricultural purposes. Ultimately biologists must join in the effort to correct the pollution and habitat damages that have reduced fertile topsoil and species distribution about 50% in the past 100 years. This means better cooperation among biologists and landowners as well as governmental agencies to help solve such problems as soil erosion, toxic pesticide residues, habitat destruction, etc.

What are your favorite natural areas in Iowa and the Midwest? What areas do you return to constantly, and what’s your favorite newly visited area?
I have several favorite natural areas in Iowa; one of them is a very disrupted habitat of abandoned strip mines where coal was removed. I enjoyed these areas in Kansas where I grew up, and I was glad to see similar habitats in Iowa. I found excellent fossil plants dating back to the Pennsylvanian era, about 350 million years ago. I saw many of the same fossils I had seen earlier and am glad that many of these are now in museum collections around the Midwest and beyond.

Another favorite natural area for me includes a number of the Iowa state parks in which we can find remnants of forested areas. These tend to have excellent mushroom habitats, and if I had to choose a favorite, it would be one from northeast Iowa such as Palisades State Park or Backbone State Park. I enjoy each type of state park but must admit a preference for the more mature forested areas.

My favorite newly visited area is the Loess Hills of northwest Iowa. I have not done serious collecting of mushrooms there, but I am attracted to the unique properties of this area.

You’ve been working on a very interesting blog-related project called BINGO ENGLISH. Tell us more.
BINGO ENGLISH is part of an online program to teach the English language in China. My first year of teaching in China was in mycology, but there was a greater need for English teachers than for biology teachers. I joined my wife in teaching writing and conversation at Zhejiang University in Hangzhou. We taught 8 semesters in China, then were invited to join a writing team preparing a series of English-language textbooks for Chinese university-level students. This resulted in the publication of New College English (NCE), for which both my wife and I wrote and edited. We served as English editors through two editions of this comprehensive series—one book for each of 6 semesters of English—and to date NCE has sold more than 2 million copies and has been adopted by more than 550 universities and colleges in China.

BINGO ENGLISH is an online version of English-language instruction using the NCE books but targeted at noncollege individuals who wish to learn at their own pace with their choice of instructional packages.

My wife and I wrote many blogs about U.S. culture for inclusion in BINGO ENGLISH. Our colleague Ying Huilan showed some of these blogs to the editor of the Foreign Language Teaching and Research Press in Beijing. That resulted in about 80 of the blogs being included in the book Inside U.S. Culture and Life, recently published by that press as a supplemental book for English-language instruction in China.
 

Marasmius oreades (Bolt.: Fr.) Fr. (plate 87); edible
Fairy Ring Mushroom
    Cap 1–5 cm broad, rounded, maturing to bell-shaped to flat, often with prominent blunt knob; cream to reddish tan, fading when dry; dry, smooth; margin sometimes striate at maturity. Flesh thin; white or tan.
    Gills adnexed to nearly free, well separated; paler than cap, creamy white to buff.
    Stalk 2–7 cm long, 2–4.5 mm thick, equal; buff at top, darker brown at bottom, with dense white hairs at base; tough.
    Spores 7–10 x 3.5–6 µm, elliptical, tapered at one end, smooth; spore print white.
    Common, in groups or in fairy rings on lawns, pastures, and grasslands; spring, summer, fall.
    This is one of three species that commonly grow in fairy rings in grasslands such as lawns, golf greens, and pastures. The other two, Chlorophyllum molybdites and Agaricus campestris, are quite different and not likely to be confused with M. oreades. While A. campestris and M. oreades are highly recommended edible species, however, C. molybdites is poisonous. The pesticide history of the area should be known and considered, because M. oreades may take up some lawn pesticides. Clitocybe dealbata, a poisonous species, may be found in the same area with M. oreades. Thus M. oreades should be collected and identified carefully.

Thursday, March 25, 2010

An Interview with Donald Huffman: Part 2

Tell us about the history of Mushrooms and Other Fungi of the Midcontinental United States and about your coauthors.
 
I became interested in preparing a book about Iowa mushrooms about 1980 after several years of attending forays held by the North American Mycological Association, an organization with perhaps 25 professional mycologists who encouraged and worked with serious amateurs. 
     

My initial intent was to publish a small guide to some of the common mushrooms in Iowa. I had accumulated a fair-size collection of photos and thought I could prepare a book similar to those which NAMA members had published in other states. As I began to organize the book, I realized that if I attempted it alone, it would take me several years to complete.
    

For several years I had exchanged mushroom information with Lois Tiffany at Iowa State University. I called her to ask whether she would be interested in joining a mushroom book project. As usual, Lois was positive in her response. She asked if we could include George Knaphus, a botany teacher at ISU and a talented photographer who took the majority of mushroom photos which she used in her teaching materials. Beginning in 1981, we met nearly every month to look at photos, discuss the organization of the book, and share mushroom interests. 
    

It became evident that Dr. K’s mushroom photos were much better than most of mine. We realized that our area of collection was actually larger than Iowa alone, so we developed the concept of a regional book that would include the habitats we had collected from most heavily. Iowa State University Press published the book in 1989, and the 3,500 copies were sold out by about 1995.
     

In 2003, Holly Carver of the University of Iowa Press asked whether we would be interested in preparing a laminated guide to common mushrooms of Iowa. Lois and I agreed to prepare this, and it has been in print since 2004. George Knaphus had passed away, and Lois suggested that Rosanne Healy, a graduate student and departmental employee at ISU, join us in our effort. Holly then asked whether we’d consider preparing a 2d edition of Mushrooms and Other Fungi of the Midcontinental United States. Rosanne Healy had by that time become a talented mushroom collector and photographer. Lois and I agreed that if Rosanne would join the project, we would prepare the 2d edition of MOFMUS.
    

After many meetings, the 2d edition of our MOFMUS was published by the University of Iowa Press in March 2008. We included George Knaphus as a collaborative author because of his major contributions of the 1st edition, and we added Rosanne as an author because of her excellent photos, her descriptions of truffles and false truffles, and her major editorial and photographic contributions.


What has changed in the outdoor world since your first days of trying to learn about it and protect it?
My earliest memories regarding environmental problems are related to the Dust Bowl Days in Kansas, where I grew up. On several occasions we were sent home from school as the dusty winds darkened skies and left their mark on the Midwest. I remember placing damp cloths on window sills and at the base of doors to keep dust from blowing into the house. Our parents told us that these storms were the result of unwise agricultural practices in the Midwest along with an elongated drought.


It seems to me that we had greater access to natural areas when I was young. There were fewer fences, and we picnicked or hiked nearly anywhere without feeling like intruders. I think we have greater and better governmental oversight of natural areas than we had in my early years. I am not sure whether this has actually improved the respect and care of natural areas, but it at least reflects society’s concern to avoid unnecessary neglect and misuse of natural resources.


I have been sensitized to a greater extent to the problem of overpopulation; throughout the world, this remains a major problem regarding environmental damage and adequate food for everyone. I see this concern as a moral imperative, and I hope I stressed this sufficiently in my last years of teaching university-level biology.




 

Hypsizygus ulmarius (Bull.) Redhead (plate 81); edible
Elm Pleurotus
    Cap 8–12 cm broad, rounded to flattened to somewhat depressed; white to buff; small scales on surface; margin inrolled at first. Flesh firm; white.
    Gills adnexed, moderately separated, broad; white to cream.
    Stalk 5–10 cm long, 1.5–2.5 cm thick, nearly equal but sometimes expanded at base; white to sometimes yellowish at maturity; dry whitish hairs at top to nearly smooth in lower area.
    Spores 5–8 x 4.5–7 µm, nearly round, smooth; spore print white to buff.
    Single to clusters of two or three on hardwoods, particularly from branch scar sites on living or dead elms and box elders; fall.
    This edible species has a very tough stalk. The flavor is somewhat like that of Pleurotus ostreatus, which we consider a good edible mushroom. This late fall mushroom dries well and can be seen on trees into the winter. It was formerly called Pleurotus ulmarius.

Photograph & caption from Mushrooms and Other Fungi of the Midcontinental United States: Second Edition

Wednesday, March 24, 2010

Plant of the Week

 

Prairie turnip
Psoralea esculenta Pursh
scientific name, 2008: Pediomelum esculentum (Pursh) Rydb.
other common names: breadroot, pomme blanche, pomme de prairie, prairie potato, tipsin, tipsinna
Psoralea: from Greek, meaning “scurfy” or “scabby,” from the glandular spots on the leaves, stem, and calyx
Esculenta: from Latin esculentus, meaning “fit for food”
Legume family: Fabaceae (Leguminosae)

Monday, March 22, 2010

An Interview with Donald Huffman: Part 1

What was the catalyst—the magic moment—that brought you to appreciate mushrooms in the first place? How long have you been studying them?

I grew up as one of seven children of a father who was a high school biology teacher, but I didn’t pay much attention to mushrooms until I encountered them in a college course called Plant Morphology. I can remember being fascinated with the varied novelties in life cycles of the fungi we studied, and I wondered at that time why the life cycles of other “plants” were less interesting. At the time I was preparing for graduate work in plant pathology, and I kept this as my goal throughout my graduate work.
    

At Iowa State University, I enrolled in a three-quarter-term sequence of mycology taught by Dr. Joseph Gilman. Lois Tiffany, a recent PhD who had studied mycology under Gilman, was in a lab with 3 other graduate students and me. Professor Gilman increased my interest in morphological variability in fungi with lots of time spent on the microscopic aspects of fungi. Lois assisted most of us grad students with more exposure to mushrooms, and by the time I finished my PhD in plant pathology I found fungi to be more interesting than plant pathology. 

Two years after taking a position at Kansas State University in plant pathology, I accepted a position as biologist at Central College in Pella, Iowa. Teaching botany and genetics, I spent a lot of time in the field and found some interesting mushrooms. It became clear to me that in my teaching position, it was advantageous to work more with fungi and less with plant diseases, which required extensive field studies. In 1961 I accepted an National Institutes of Health postdoctoral position at Columbia University with the well-known mycologist Lindsay Olive. After that I began studying mushrooms seriously.
So the “magic moment” for me was spread over quite a period of time. Appreciation of mushrooms really gelled for me while working on the 1st edition of Mushrooms and Other Fungi of the Midcontinental United States, with the very supportive collaboration of Lois Tiffany and George Knaphus.

Agaricus campestris L.: Fr. (plate 7); edible
Meadow Mushroom, Pink Bottom
    Cap 3–10 cm broad, convex to nearly flat at maturity; white, becoming light brown or darker; smooth to fibrillose. Flesh firm; white or brownish, unchanging or slowly turning brownish when cut.
    Gills free, crowded, narrow; pink, maturing to purple brown.
    Stalk 3–6 cm long, 1–2.5 cm thick, equal; white and smooth above annulus, white and hairy below; same color as cap at maturity.
    Annulus one single layer, thin, sometimes disappearing.
    Spores 6–7.5 x 4–5 µm, ovoid to elliptical; spore print dark chocolate brown.
    Scattered to abundant in lawns, meadows, and pastures following rains and cool weather; spring, summer, fall.
    This delicious common mushroom is closely related to the cultivar A. hortensis, which is grown commercially. The characteristic bright pink, free gills and the brown spore print clearly distinguish this mushroom from the white-spored Amanitas.


Beyond mycology, what other plants and animals are you especially interested in?
I’ve been interested in only a few other organisms, and for the most part I had these interests well before I became a biologist. I did not find much interest in green plants or in birds, both of which my father enjoyed studying.
    

When I was 4 or 5 years old, my brothers and I kept pet box turtles. We painted our initials or numbers on the top of each shell. This made it possible to have turtle races in the basement in winter and in the backyard in warmer weather. I don’t really think I was much interested in them except for the thrill of the races. From about age 12 until 16, I was quite interested in snakes. I kept a few in captivity, mostly blue racers, milk snakes, garter snakes, and black snakes.  One of my prize snakes was not a snake but a glass snake, a legless lizard with a shiny body that broke off its tail section when threatened. I kept the glass snake for more than a year, but the regrowth of the tail was very slow. Later in life I really had no interest in snakes, though I encountered them plenty of times while hiking. I was never very happy to be bitten by a snake.
    

Our family had a series of bulldogs—Boston bulls—and I really was interested in them, not only as pets but as companions in the hiking and camping we did in the summers. My main interests were in training the dogs to do specific tasks. I’m still fond of dogs and can’t imagine being without one. 
    














It has always amazed me how interested some people can be in a given group of organisms. I’d bet most of this interest came from an outstanding teacher who emphasized experimental studies in research efforts.

Wednesday, March 17, 2010

This Week in Iowa Nature

Red-winged blackbird males arrive when the snow melts; females follow two weeks later.

Jean C. Prior and James Sandrock, The Iowa Nature Calendar

Monday, March 15, 2010

An Interview with Cornelia F. Mutel: Part 2

How toxic were the floodwaters? Can we safely farm and garden and picnic in areas that were flooded?

We have an entire chapter discussing the many pollutants picked up by floodwaters—ranging from farm chemicals (e.g., pesticides, fertilizers, animal waste and all its bacteria and hormones) to complex urban chemicals, including industrial and residential chemical contaminants and the overflow from wastewater treatment plants. Tests of 2008 floodwaters indicated that the total amount of these contaminants was very large. The effect of this “chemical cocktail” of contaminants was worrisome for both humans and wildlife who came in contact with floodwaters. However, these contaminants would have been diluted by the tremendous volume of floodwater. Ongoing tests do not indicate any harmful accumulation of toxics in Cedar Rapids soil. Thus people can consider it safe to garden, farm, and picnic in previously flooded areas. 



Were there any positive results from the flooding?
John Pearson’s chapter on nature’s response points out that floods have always been part of our landscape and that flooding is positive for floodplain ecosystems. Native floodplain species are adapted to the disruption caused by floods, and some even require periodic flooding for successful reproduction. Floods are considered destructive because we put ourselves and our structures in the wrong places at the wrong times.


On another level, data on climate indicate that midwestern weather is intensifying and becoming more extreme. The result is likely to be more extreme floods. The 2008 floods can serve as our wake-up call, prompting us to take steps that will reduce future flood damage. If we act appropriately, we could have a far better response to the future flooding that is sure to come—and that would indeed be a positive result.



A Watershed Year will appeal to a wide range of general readers. What can the average citizen of Iowa and the Corn Belt do to help prevent floods?Each of us can take steps in our own manner. Some people may work to reduce runoff, for example, by increasing soil health and water infiltration on our own property or by installing a rain garden or native plantings. Some may put pressure on public officials to revise flood policies or to prevent new construction in floodplains. Some may work to restore wetlands and uplands so they absorb and hold water more effectively. While only a few of us can address future flooding through our professions, all of us can continue to raise awareness of the potential damage of future floods.  I do believe that if each one of us took a few small steps to address future flooding, the results would be tremendous.



City planners, engineers, and policy makers will be particularly interested in this book. What’s the main message that A Watershed Year conveys to these specialists?

Don’t try to return to business as usual. By doing so, we return to an unacceptable vulnerability to future extreme floods, which are not only likely to continue but also (according to climate change predictions) likely to increase. Treat the 1993 and 2008 flooding as wake-up calls. Section 4 of A Watershed Year gives many recommendations for preventing or reducing the magnitude of future flood damage. The time to act on these recommendations is now.

—Cornelia F. Mutel, editor, A Watershed Year: Anatomy of the Iowa Floods of 2008