Coniferous trees are the dominant plants of the taiga biome. A very few species in four main genera are found: the evergreen spruce, fir and pine, and the deciduous larch. In North America, one or two species of fir and one or two species of spruce are dominant.lthough the taiga is dominated by coniferous forests, some broadleaf trees also occur, notably birch, aspen, willow, and rowan. Many smaller herbaceous plants, such as ferns and occasionally ramps grow closer to the ground.
Top 100 Most Prescribed, Top Selling Drugs. The hypothyroid medication levothyroxine (Synthroid, AbbVie) continues to be the nation's most prescribed drug, and the antipsychotic aripiprazole (Abilify, Otsuka Pharmaceutical) continues to have the highest sales, at nearly $6.9 billion, according to the latest data from research firm IMS Health.
- Pure opium, as well as opium-based and opium-derived drugs, ranks second only to alcohol as the most addictive substances on the market. Some of the most commonly used opium drugs include: Heroin Morphine Codeine Oxycontin Demerol Hydrocodone Even in prescription form, the dangers of opium use are really no different than those associated with heroin ...