Arnica Montana
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---------------------------------------------------------------------------------------------------------------- Common name Scientific name Limitations----------------------------------------------------------------------------------------------------------------Aloe............................................. Aloe perryi Baker, A. barbadensis Mill., A. ferox Mill., and hybrids of this sp. with A. africana Mill. and A. spicata Baker.Althea root and flowers.......................... Althea officinalis L........Amyris (West Indian sandalwood).................. Amyris balsamifera L........Angola weed...................................... Roccella fuciformis Ach..... In alcoholic beverages onlyArnica flowers................................... Arnica montana L., A. Do. fulgens Pursh, A. sororia Greene, or A. cordifolia Hooker.Artemisia (wormwood)............................. Artemisia spp............... Finished food thujone free\1Artichoke leaves................................. Cynara s ... [Read More]
Melanoplus bruneri fact sheet
In the western United States, the species inhabits mountain meadowswhere populations irrupt at irregular intervals and cause severe damageto forage. An early record of forage destruction tells of the impact ofa heavy infestation of M. bruneri in eastcentral Nevada in the HumboldtNational Forest. The infested area consisted of tableland lying at an elevationof 11,000 feet, vegetated by bunch grasses and forbs, and grazed by sheep.High numbers of grasshoppers were reported from 1936 to 1938. In mid September1937, densities were estimated at 20 adults per square yard. In an attemptto control this infestation, poison bait was transported to the sheep rangeby pack mules in 1937 and spread by hand. A large population, still presentin 1938, was decimated by a midsummer hail storm. Records reveal outbreaksand damage in the mountains of Montana, Utah, and Wyoming. In the CrazyMountains of Park County, Montana, severe damage to meadow grasses wasinflicted by high numbers of Camnula pellucida a ... [Read More]
Geology significant in determining vegetation growth in Yellowstone--National Park Service--WASO-INFO
After 10 years, plots on andesitic soils had a thick ground cover with plants overlapping to cover 120–140% of the surface. On the rhyolitic soils, cover was only 35–90%, but even this was greater than the prefire ground cover of 20–60%. Douglas-fir seedlings predominated on the low-elevation andesitic sites, while lodgepole pine dominated at higher elevations and on all the rhyolitic sites. On average, 20 to 25 different species per plot were documented on andesite, while only 12 to 17 species occurred on the rhyolitic sites. Plants grew faster on the warmer, lower elevations, and a given level of plant cover was reached earlier than on higher elevations. Some flowers and grasses, such as dragon's tongue and heart-leafed arnica, did better in the early years and became less conspicuous as time went on, while others, such as pine grass and showy aster, steadily increased. Seeds of two species that had not been frequently observed in the park were waiting in the soil for ... [Read More]
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