Linda Haugen's Images
Title: Plant PathologistOrganization: USDA Forest Service
Unit: Forest Health Protection
Country: United States
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| 84 Images of 51 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 1400113 | chestnut blight or canker | Cryphonectria parasitica | Canker on main stem; note dead branch in center of canker, discolored bark, and orange bumps (stroma) breaking through killed bark. |
| 1400098 | Armillaria root rots | Armillaria spp. | Rhizomorphs on dead oak |
| 1400112 | chestnut blight or canker | Cryphonectria parasitica | Lethal canker on main stem, with bark discoloration and orange stroma. |
| 1400114 | chestnut blight or canker | Cryphonectria parasitica | Orange stroma of cryphonectria emerging through bark of canker. |
| 1400124 | cedar-apple rust | Gymnosporangium juniperi-virginianae | telial horns from galls on cedar, southeast Minnesota in spring following moist weather. |
| 1400035 | hemlock varnish shelf | Ganoderma tsugae | conks on dead hemlock, Sylvania Wilderness, Ottawa National Forest, Michigan. |
| 1400048 | pine marten | Martes americana | Ottawa National Forest |
| 1400087 | clubmoss | Lycopodium spp. | "ground pine" (clubmoss) in northern Minnesota woodland. |
| 1400164 | oriental bittersweet | Celastrus orbiculatus | North Carolina |
| 1400144 | Eutypella canker | Eutypella parasitica | canker on maple in a Wisconsin sugarbush stand. |
| 1400149 | eastern newt | Notophthalmus viridescens | red eft stage |
| 1400158 | garlic mustard | Alliaria petiolata | |
| 1400156 | wild parsnip | Pastinaca sativa | |
| 1400120 | Phomopsis cankers and twig blights | Phomopsis spp. | Phomopsis galls on the main stem of bitternut hickory in Wisconsin. |
| 1400137 | periodical cicada | Magicicada septendecim | Branch flagging on bur oak due to oviposition damage by the 1997 brood emergence of the periodical (17 year) cicada in central Iowa. |
| 1400108 | Hypoxylon cankers | Hypoxylon spp. | Canker (discolored, sunken area on bark) on aspen |
| 1400103 | Armillaria root rots | Armillaria spp. | Dying aspen, Nicolet National Forest, Wisconsin. Bark cut away to show strip kill on stem. Bark on root cut away to show armillaria rhizomorphs. See image #1400102. |
| 1400092 | eastern white pine | Pinus strobus | Regeneration in small canopy opening. Superior National Forest |
| 1400094 | skunkcabbage | Symplocarpus foetidus | in Upper Peninsula of Michigan, May. |
| 1400084 | fly agaric | Amanita muscaria | |
| 1400009 | Diplodia blight | Sphaeropsis sapinea | Following tornado damage, Upper Peninsula, Michigan. |
| 1400025 | birch conk | Piptoporus betulinus | conks on dead paper birch in northern Minnesota. |
| 1400041 | clinker polypore | Inonotus obliquus | Conk on live paper birch, Ottawa National Forest, Michigan. |
| 1400026 | birch conk | Piptoporus betulinus | conk on dead paper birch, northern Minnesota. |
| 1400023 | yellow cap fungi | Pholiota spp. | Inside cavity of living basswood. |
| 1400024 | white heartwood rot | Phellinus tremulae | Nicolet National Forest |
| 1400014 | frost and winter injury (general) | Bark cut away to show freeze damage and subsequent cankering (killed cambium) from winter 1993 freeze event in Southeast Minnesota. | |
| 1400010 | Diplodia blight | Sphaeropsis sapinea | Following tornado damage in Upper Peninsula of Michigan. See image 1400011 for cut away view. |
| 1400040 | clinker polypore | Inonotus obliquus | conk on live paper birch, Ottawa National Forest, Michigan. |
| 1400126 | gall rust of jack pine | Cronartium quercuum f.sp. banksianae | Pycnial stage (honey-like droplets on the gall) of gall rust on jack pine in Wisconsin in spring. |
| 1400076 | purple loosestrife | Lythrum salicaria | Southeast Minnesota, September. |
| 1400086 | pink lady's-slipper | Cypripedium acaule | In northern Wisconsin pine woods, June. |
| 1400036 | northern tooth | Climacodon septentrionalis | Upper Peninsula, Michigan |
| 1400034 | hemlock varnish shelf | Ganoderma tsugae | on dead hemlock, Sylvania Wilderness, Ottawa National Forest, Michigan. |
| 1400096 | yellow marsh marigold | Caltha palustris | in Upper Peninsula of Michigan, May. |
| 1400142 | Septoria leaf spot and cankers | Septoria spp. | On a susceptible clone of hybrid poplar. |
| 1400039 | yellow cap fungi | Pholiota spp. | Sylvania Wilderness |
| 1400109 | black rot | Ceratocystis fimbriata | Canker on high elevation aspen, Bristlecone Trail, Toiyabe National Forest. |
| 1400118 | hickory decline | Bitternut hickory decline and mortality in Northeast Iowa. Cause was unidentified, but hickory bark beetle and/or Ceratocystis sp. were likely involved. | |
| 1400159 | garlic mustard | Alliaria petiolata | |
| 1400173 | zonate leaf spot | Grovesinia pyramidalis | |
| 1400011 | Diplodia blight | Sphaeropsis sapinea | Bark cut away from canker (see image 1400010) to show necrosis of cambium due to diplodia blight. |
| 1400155 | beech bark disease | Nectria coccinea | Cankered stem of beech following attack by beech scale and infection by Neonectria (beech bark disease complex) in Ontario. |
| 1400090 | yellow lady's slipper | Cypripedium parviflorum | in Wisconsin woodland, May. |
| 1400091 | yellow lady's slipper | Cypripedium parviflorum | in Wisconsin woodland, May. |
| 1400021 | northern tooth | Climacodon septentrionalis | |
| 1400071 | fly agaric | Amanita muscaria | |
| 1400107 | Hypoxylon cankers | Hypoxylon spp. | Stroma |
| 1400147 | oyster mushroom | Pleurotus ostreatus | |
| 1400152 | Dutch elm disease | Ophiostoma ulmi | |
| 1400154 | garlic mustard | Alliaria petiolata | |
| 1400106 | Hypoxylon cankers | Hypoxylon spp. | (on broken stem), |
| 1400104 | Nectria canker | Nectria spp. | "target canker" on aspen, Nicolet National Forest, Wisconsin. |
| 1400166 | lightning | on golf course | |
| 1400163 | oriental bittersweet | Celastrus orbiculatus | |
| 1400060 | wild turkey | Meleagris gallopavo | Eggs in nest. |
| 1400057 | yellow lady's slipper | Cypripedium parviflorum | in Wisconsin Woodlands, May. |
| 1400056 | yellow lady's slipper | Cypripedium parviflorum | in Wisconsin woodlands (May). |
| 1400162 | oriental bittersweet | Celastrus orbiculatus | |
| 1400153 | Dutch elm disease | Ophiostoma ulmi | Dying elm, marked for removal. July |
| 1400052 | eastern white pine | Pinus strobus | |
| 1400157 | garlic mustard | Alliaria petiolata | |
| 1400059 | showy orchid | Galearis spectabilis | in Wisconsin woodland, May. |
| 1400037 | northern tooth | Climacodon septentrionalis | On live sugar maple in Sylvania Wilderness, Upper Peninsula, Michigan. |
| 1400116 | basal cankers | Swollen butt and woodpecker damage. At the time this photo was taken, this tree had no signs of chestnut blight. The swollen butt and woodpecker damage seemed to be unrelated to chestnut blight. The tree has since succombed to the disease. | |
| 1400121 | southwestern white-spored gall rust | Peridermium (An undescribed species) | White-spored gall rust on Ponderosa pine, Toiyabe National Forest, Nevada. Although previously thought to be a white-spored variation of western gall rust, this rust is probably a distinctly separate species. This photo was taken on a field trip in 1998. At that time the researchers who selected the site clearly explained that white-spored gall rust was distinctly different from typical orange-spored western gall rust, and that this was a site with the white-spored type. A species description and valid scientific name is still pending. Mycologia, 90(2), 1998, pp244-257. http://www.jstor.org/stable/3761300 |
| 1400042 | stem girdling roots | Linden with girdling roots. | |
| 1400031 | milk-white toothed polypore | Irpex lacteus | |
| 1400078 | frost and winter injury (general) | Frost | |
| 1400079 | Ramaria fungi | Ramaria spp. | coral fungus on rotting log, Michigan maple forest in August. |
| 1400081 | national forest | aerial view of riparian area, Hiawatha National Forest | |
| 1400063 | clubmoss | Lycopodium spp. | Upper Peninsula of Michigan, October. |
| 1400089 | rainbow | Rainbow over Lake Superior,northern Minnesota. | |
| 1400123 | black knot | Apiosporina morbosa | Ottawa National Forest |
| 1400133 | Zimmerman pine moth | Dioryctria zimmermani | Pitch masses |
| 1400115 | American chestnut | Castanea dentata | Wisconsin State Champion Chestnut. 1995 |
| 1400148 | Phytophthora root and crown rots | Phytophthora spp. | Fraser fir Christmas tree killed by phytophthora root disease in poorly drained portion of plantation, North Carolina. |
| 1400145 | oyster mushroom | Pleurotus ostreatus | |
| 1400101 | Armillaria root rots | Armillaria spp. | Armillaria mushrooms in a Wisconsin hardwood stand, autumn. Note one mushroom flipped over to show gills. |
| 1400093 | eastern white pine | Pinus strobus | Large cone crop. Superior National Forest |
| 1400110 | American chestnut | Castanea dentata | Tree protectors |
| 1400111 | chestnut blight or canker | Cryphonectria parasitica | orange colored stroma of cryphonectria on main stem around base of dead branch. |
| 1400165 | lightning | on golf course | |
| 1400174 | Dutch elm disease | Ophiostoma ulmi | American elm tree removal |
