Photo by Bill Reynolds
Sigmoid prominent (Clostera albosigma) is a medium-sized, heavy-bodied, nocturnal moth. It is the most common of the four Clostera species found in Minnesota. Adult moths are found from mid-May to mid-August in deciduous woodlands and forests, and in shrubby wetlands and fields.
A sigmoid prominent adult has grayish-brown wings, a dark brown head and upper thorax, and on the male, a dark brown tuft at the end of the abdomen. The wings are crossed by four pale lines. A dark, chestnut-brown area near the end of the forewing is sharply delineated by a prominent white “S”-shaped bar. The species name albosigma means “white S” and refers to this marking. Spring individuals are darker with more highly contrasting markings. Summer individuals are paler and less conspicuously marked.
The caterpillar feeds mostly on quaking aspen, but also on poplar and willow, and sometimes on alder, birch, maple, and elm. It is a solitary feeder. During the day it curls up a leaf of a host plant and sticks it together with silk webbing, make a shelter where it can feed in safety. Adults do not feed.
Photo by Kirk Nelson
Morel mushrooms (Morchella spp.) are some of the best known and most sought after wild mushrooms in North America. They are particularly abundant in the upper Midwest. They are edible, considered delicious, and are hunted for in deciduous woodlands every spring. False morels (Gyromitra spp.) look superficially similar and appear at the same time of year in roughly the same areas. However, false morels are poisonous. They contain the chemical gyromitrin, which is metabolized in the body into a volatile chemical used as a rocket propellant.
Gabled False Morel (Gyromitra brunnea) is the most common false morel in Minnesota and Wisconsin. It is found in the spring, alone or in groups, on the ground under hardwood trees. The cap is tan to reddish-brown, 2″ to 4″ wide, and loosely wrinkled. It is usually saddle-shaped or winged, divided into 2 or 3 strongly projecting lobes that are fused to each other.
Snow Morel (Gyromitra gigas) is a common early mushroom in forests of North America. It is called a “false morel” due to its similarity in appearance and seasonality to true morels. It is found in the spring and early summer alone, scattered, or in groups, on the ground or on rotten wood, under coniferous or hardwood trees, often poking through leaf litter. It is saprobic, obtaining nutrients from rotting wood, and might also be mycorrhizal, having a mutually beneficial relationship with the tiny rootlets of trees. It may exhibit both traits at different parts of its life cycle.
Snow Morel is edible if sautéed but not edible when raw. Some authors suggest that it be avoided due to its similarity in appearance to the poisonous False Morel (Gyromitra esculenta).
Snow Morel is identified by the squarish, blocky, convoluted cap that is compact and rarely has projecting lobes; and the massive, ribbed or longitudinally wrinkled stem that is often mostly or completely hidden by the closely appressed cap.